5 Focus: Security, Bug fixes, enhancements.
9 In addition to bug fixes and enhancements, this release fixes the
10 following medium-severity vulnerability:
12 * Small-step/big-step. Close the panic gate earlier.
13 References: Sec 2956, CVE-2015-5300
14 Affects: All ntp-4 releases up to, but not including 4.2.8p5, and
15 4.3.0 up to, but not including 4.3.78
16 CVSS3: (AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:N/A:L) Base Score: 4.0, MEDIUM
17 Summary: If ntpd is always started with the -g option, which is
18 common and against long-standing recommendation, and if at the
19 moment ntpd is restarted an attacker can immediately respond to
20 enough requests from enough sources trusted by the target, which
21 is difficult and not common, there is a window of opportunity
22 where the attacker can cause ntpd to set the time to an
23 arbitrary value. Similarly, if an attacker is able to respond
24 to enough requests from enough sources trusted by the target,
25 the attacker can cause ntpd to abort and restart, at which
26 point it can tell the target to set the time to an arbitrary
27 value if and only if ntpd was re-started against long-standing
28 recommendation with the -g flag, or if ntpd was not given the
29 -g flag, the attacker can move the target system's time by at
30 most 900 seconds' time per attack.
32 Configure ntpd to get time from multiple sources.
33 Upgrade to 4.2.8p5, or later, from the NTP Project Download
34 Page or the NTP Public Services Project Download Page
35 As we've long documented, only use the -g option to ntpd in
36 cold-start situations.
37 Monitor your ntpd instances.
38 Credit: This weakness was discovered by Aanchal Malhotra,
39 Isaac E. Cohen, and Sharon Goldberg at Boston University.
41 NOTE WELL: The -g flag disables the limit check on the panic_gate
42 in ntpd, which is 900 seconds by default. The bug identified by
43 the researchers at Boston University is that the panic_gate
44 check was only re-enabled after the first change to the system
45 clock that was greater than 128 milliseconds, by default. The
46 correct behavior is that the panic_gate check should be
47 re-enabled after any initial time correction.
49 If an attacker is able to inject consistent but erroneous time
50 responses to your systems via the network or "over the air",
51 perhaps by spoofing radio, cellphone, or navigation satellite
52 transmissions, they are in a great position to affect your
53 system's clock. There comes a point where your very best
56 Configure ntpd to get time from multiple sources.
57 Monitor your ntpd instances.
61 * Coverity submission process updated from Coverity 5 to Coverity 7.
62 The NTP codebase has been undergoing regular Coverity scans on an
63 ongoing basis since 2006. As part of our recent upgrade from
64 Coverity 5 to Coverity 7, Coverity identified 16 nits in some of
65 the newly-written Unity test programs. These were fixed.
66 * [Bug 2829] Clean up pipe_fds in ntpd.c perlinger@ntp.org
67 * [Bug 2887] stratum -1 config results as showing value 99
68 - fudge stratum should only accept values [0..16]. perlinger@ntp.org
69 * [Bug 2932] Update leapsecond file info in miscopt.html. CWoodbury, HStenn.
70 * [Bug 2934] tests/ntpd/t-ntp_scanner.c has a magic constant wired in. HMurray
71 * [Bug 2944] errno is not preserved properly in ntpdate after sendto call.
72 - applied patch by Christos Zoulas. perlinger@ntp.org
73 * [Bug 2952] Peer associations broken by fix for Bug 2901/CVE-2015-7704.
74 * [Bug 2954] Version 4.2.8p4 crashes on startup on some OSes.
75 - fixed data race conditions in threaded DNS worker. perlinger@ntp.org
76 - limit threading warm-up to linux; FreeBSD bombs on it. perlinger@ntp.org
77 * [Bug 2957] 'unsigned int' vs 'size_t' format clash. perlinger@ntp.org
78 - accept key file only if there are no parsing errors
79 - fixed size_t/u_int format clash
80 - fixed wrong use of 'strlcpy'
81 * [Bug 2958] ntpq: fatal error messages need a final newline. Craig Leres.
82 * [Bug 2962] truncation of size_t/ptrdiff_t on 64bit targets. perlinger@ntp.org
83 - fixed several other warnings (cast-alignment, missing const, missing prototypes)
84 - promote use of 'size_t' for values that express a size
85 - use ptr-to-const for read-only arguments
86 - make sure SOCKET values are not truncated (win32-specific)
88 * [Bug 2965] Local clock didn't work since 4.2.8p4. Martin Burnicki.
89 * [Bug 2967] ntpdate command suffers an assertion failure
90 - fixed ntp_rfc2553.c to return proper address length. perlinger@ntp.org
91 * [Bug 2969] Seg fault from ntpq/mrulist when looking at server with
92 lots of clients. perlinger@ntp.org
93 * [Bug 2971] ntpq bails on ^C: select fails: Interrupted system call
94 - changed stacked/nested handling of CTRL-C. perlinger@ntp.org
95 * Unity cleanup for FreeBSD-6.4. Harlan Stenn.
96 * Unity test cleanup. Harlan Stenn.
97 * Libevent autoconf pthread fixes for FreeBSD-10. Harlan Stenn.
98 * Header cleanup in tests/sandbox/uglydate.c. Harlan Stenn.
99 * Header cleanup in tests/libntp/sfptostr.c. Harlan Stenn.
100 * Quiet a warning from clang. Harlan Stenn.
105 Focus: Security, Bug fixes, enhancements.
109 In addition to bug fixes and enhancements, this release fixes the
110 following 13 low- and medium-severity vulnerabilities:
112 * Incomplete vallen (value length) checks in ntp_crypto.c, leading
113 to potential crashes or potential code injection/information leakage.
115 References: Sec 2899, Sec 2671, CVE-2015-7691, CVE-2015-7692, CVE-2015-7702
116 Affects: All ntp-4 releases up to, but not including 4.2.8p4,
117 and 4.3.0 up to, but not including 4.3.77
118 CVSS: (AV:N/AC:H/Au:M/C:N/I:N/A:C) Base Score: 4.6
119 Summary: The fix for CVE-2014-9750 was incomplete in that there were
120 certain code paths where a packet with particular autokey operations
121 that contained malicious data was not always being completely
122 validated. Receipt of these packets can cause ntpd to crash.
125 Upgrade to 4.2.8p4, or later, from the NTP Project Download
126 Page or the NTP Public Services Project Download Page
127 Monitor your ntpd instances.
128 Credit: This weakness was discovered by Tenable Network Security.
130 * Clients that receive a KoD should validate the origin timestamp field.
132 References: Sec 2901 / CVE-2015-7704, CVE-2015-7705
133 Affects: All ntp-4 releases up to, but not including 4.2.8p4,
134 and 4.3.0 up to, but not including 4.3.77
135 CVSS: (AV:N/AC:M/Au:N/C:N/I:N/A:P) Base Score: 4.3-5.0 at worst
136 Summary: An ntpd client that honors Kiss-of-Death responses will honor
137 KoD messages that have been forged by an attacker, causing it to
138 delay or stop querying its servers for time updates. Also, an
139 attacker can forge packets that claim to be from the target and
140 send them to servers often enough that a server that implements
141 KoD rate limiting will send the target machine a KoD response to
142 attempt to reduce the rate of incoming packets, or it may also
143 trigger a firewall block at the server for packets from the target
144 machine. For either of these attacks to succeed, the attacker must
145 know what servers the target is communicating with. An attacker
146 can be anywhere on the Internet and can frequently learn the
147 identity of the target's time source by sending the target a
151 Upgrade to 4.2.8p4, or later, from the NTP Project Download Page
152 or the NTP Public Services Project Download Page
153 If you can't upgrade, restrict who can query ntpd to learn who
154 its servers are, and what IPs are allowed to ask your system
155 for the time. This mitigation is heavy-handed.
156 Monitor your ntpd instances.
158 4.2.8p4 protects against the first attack. For the second attack,
159 all we can do is warn when it is happening, which we do in 4.2.8p4.
160 Credit: This weakness was discovered by Aanchal Malhotra,
161 Issac E. Cohen, and Sharon Goldberg of Boston University.
163 * configuration directives to change "pidfile" and "driftfile" should
164 only be allowed locally.
166 References: Sec 2902 / CVE-2015-5196
167 Affects: All ntp-4 releases up to, but not including 4.2.8p4,
168 and 4.3.0 up to, but not including 4.3.77
169 CVSS: (AV:N/AC:H/Au:M/C:N/I:C/A:C) Base Score: 6.2 worst case
170 Summary: If ntpd is configured to allow for remote configuration,
171 and if the (possibly spoofed) source IP address is allowed to
172 send remote configuration requests, and if the attacker knows
173 the remote configuration password, it's possible for an attacker
174 to use the "pidfile" or "driftfile" directives to potentially
175 overwrite other files.
178 Upgrade to 4.2.8p4, or later, from the NTP Project Download
179 Page or the NTP Public Services Project Download Page
180 If you cannot upgrade, don't enable remote configuration.
181 If you must enable remote configuration and cannot upgrade,
182 remote configuration of NTF's ntpd requires:
183 - an explicitly configured trustedkey, and you should also
184 configure a controlkey.
185 - access from a permitted IP. You choose the IPs.
186 - authentication. Don't disable it. Practice secure key safety.
187 Monitor your ntpd instances.
188 Credit: This weakness was discovered by Miroslav Lichvar of Red Hat.
190 * Slow memory leak in CRYPTO_ASSOC
192 References: Sec 2909 / CVE-2015-7701
193 Affects: All ntp-4 releases that use autokey up to, but not
194 including 4.2.8p4, and 4.3.0 up to, but not including 4.3.77
195 CVSS: (AV:N/AC:H/Au:M/C:N/I:N/A:C) Base Score: 0.0 best/usual case,
197 Summary: If ntpd is configured to use autokey, then an attacker can
198 send packets to ntpd that will, after several days of ongoing
199 attack, cause it to run out of memory.
202 Upgrade to 4.2.8p4, or later, from the NTP Project Download
203 Page or the NTP Public Services Project Download Page
204 Monitor your ntpd instances.
205 Credit: This weakness was discovered by Tenable Network Security.
207 * mode 7 loop counter underrun
209 References: Sec 2913 / CVE-2015-7848 / TALOS-CAN-0052
210 Affects: All ntp-4 releases up to, but not including 4.2.8p4,
211 and 4.3.0 up to, but not including 4.3.77
212 CVSS: (AV:N/AC:H/Au:M/C:N/I:N/A:C) Base Score: 4.6
213 Summary: If ntpd is configured to enable mode 7 packets, and if the
214 use of mode 7 packets is not properly protected thru the use of
215 the available mode 7 authentication and restriction mechanisms,
216 and if the (possibly spoofed) source IP address is allowed to
217 send mode 7 queries, then an attacker can send a crafted packet
218 to ntpd that will cause it to crash.
221 Upgrade to 4.2.8p4, or later, from the NTP Project Download
222 Page or the NTP Public Services Project Download Page.
223 If you are unable to upgrade:
224 In ntp-4.2.8, mode 7 is disabled by default. Don't enable it.
225 If you must enable mode 7:
226 configure the use of a requestkey to control who can issue
228 configure restrict noquery to further limit mode 7 requests
230 Monitor your ntpd instances.
231 Credit: This weakness was discovered by Aleksandar Nikolic of Cisco Talos.
233 * memory corruption in password store
235 References: Sec 2916 / CVE-2015-7849 / TALOS-CAN-0054
236 Affects: All ntp-4 releases up to, but not including 4.2.8p4, and 4.3.0 up to, but not including 4.3.77
237 CVSS: (AV:N/AC:H/Au:M/C:N/I:C/A:C) Base Score: 6.8, worst case
238 Summary: If ntpd is configured to allow remote configuration, and if
239 the (possibly spoofed) source IP address is allowed to send
240 remote configuration requests, and if the attacker knows the
241 remote configuration password or if ntpd was configured to
242 disable authentication, then an attacker can send a set of
243 packets to ntpd that may cause a crash or theoretically
244 perform a code injection attack.
247 Upgrade to 4.2.8p4, or later, from the NTP Project Download
248 Page or the NTP Public Services Project Download Page.
249 If you are unable to upgrade, remote configuration of NTF's
251 an explicitly configured "trusted" key. Only configure
253 access from a permitted IP address. You choose the IPs.
254 authentication. Don't disable it. Practice secure key safety.
255 Monitor your ntpd instances.
256 Credit: This weakness was discovered by Yves Younan of Cisco Talos.
258 * Infinite loop if extended logging enabled and the logfile and
259 keyfile are the same.
261 References: Sec 2917 / CVE-2015-7850 / TALOS-CAN-0055
262 Affects: All ntp-4 releases up to, but not including 4.2.8p4,
263 and 4.3.0 up to, but not including 4.3.77
264 CVSS: (AV:N/AC:H/Au:M/C:N/I:N/A:C) Base Score: 4.6, worst case
265 Summary: If ntpd is configured to allow remote configuration, and if
266 the (possibly spoofed) source IP address is allowed to send
267 remote configuration requests, and if the attacker knows the
268 remote configuration password or if ntpd was configured to
269 disable authentication, then an attacker can send a set of
270 packets to ntpd that will cause it to crash and/or create a
271 potentially huge log file. Specifically, the attacker could
272 enable extended logging, point the key file at the log file,
273 and cause what amounts to an infinite loop.
276 Upgrade to 4.2.8p4, or later, from the NTP Project Download
277 Page or the NTP Public Services Project Download Page.
278 If you are unable to upgrade, remote configuration of NTF's ntpd
280 an explicitly configured "trusted" key. Only configure this
282 access from a permitted IP address. You choose the IPs.
283 authentication. Don't disable it. Practice secure key safety.
284 Monitor your ntpd instances.
285 Credit: This weakness was discovered by Yves Younan of Cisco Talos.
287 * Potential path traversal vulnerability in the config file saving of
290 References: Sec 2918 / CVE-2015-7851 / TALOS-CAN-0062
291 Affects: All ntp-4 releases running under VMS up to, but not
292 including 4.2.8p4, and 4.3.0 up to, but not including 4.3.77
293 CVSS: (AV:N/AC:H/Au:M/C:N/I:P/A:C) Base Score: 5.2, worst case
294 Summary: If ntpd is configured to allow remote configuration, and if
295 the (possibly spoofed) IP address is allowed to send remote
296 configuration requests, and if the attacker knows the remote
297 configuration password or if ntpd was configured to disable
298 authentication, then an attacker can send a set of packets to
299 ntpd that may cause ntpd to overwrite files.
302 Upgrade to 4.2.8p4, or later, from the NTP Project Download
303 Page or the NTP Public Services Project Download Page.
304 If you are unable to upgrade, remote configuration of NTF's ntpd
306 an explicitly configured "trusted" key. Only configure
308 access from permitted IP addresses. You choose the IPs.
309 authentication. Don't disable it. Practice key security safety.
310 Monitor your ntpd instances.
311 Credit: This weakness was discovered by Yves Younan of Cisco Talos.
313 * ntpq atoascii() potential memory corruption
315 References: Sec 2919 / CVE-2015-7852 / TALOS-CAN-0063
316 Affects: All ntp-4 releases running up to, but not including 4.2.8p4,
317 and 4.3.0 up to, but not including 4.3.77
318 CVSS: (AV:N/AC:H/Au:N/C:N/I:P/A:P) Base Score: 4.0, worst case
319 Summary: If an attacker can figure out the precise moment that ntpq
320 is listening for data and the port number it is listening on or
321 if the attacker can provide a malicious instance ntpd that
322 victims will connect to then an attacker can send a set of
323 crafted mode 6 response packets that, if received by ntpq,
324 can cause ntpq to crash.
327 Upgrade to 4.2.8p4, or later, from the NTP Project Download
328 Page or the NTP Public Services Project Download Page.
329 If you are unable to upgrade and you run ntpq against a server
330 and ntpq crashes, try again using raw mode. Build or get a
331 patched ntpq and see if that fixes the problem. Report new
332 bugs in ntpq or abusive servers appropriately.
333 If you use ntpq in scripts, make sure ntpq does what you expect
335 Credit: This weakness was discovered by Yves Younan and
336 Aleksander Nikolich of Cisco Talos.
338 * Invalid length data provided by a custom refclock driver could cause
341 References: Sec 2920 / CVE-2015-7853 / TALOS-CAN-0064
342 Affects: Potentially all ntp-4 releases running up to, but not
343 including 4.2.8p4, and 4.3.0 up to, but not including 4.3.77
344 that have custom refclocks
345 CVSS: (AV:L/AC:H/Au:M/C:C/I:C/A:C) Base Score: 0.0 usual case,
346 5.9 unusual worst case
347 Summary: A negative value for the datalen parameter will overflow a
348 data buffer. NTF's ntpd driver implementations always set this
349 value to 0 and are therefore not vulnerable to this weakness.
350 If you are running a custom refclock driver in ntpd and that
351 driver supplies a negative value for datalen (no custom driver
352 of even minimal competence would do this) then ntpd would
353 overflow a data buffer. It is even hypothetically possible
354 in this case that instead of simply crashing ntpd the attacker
355 could effect a code injection attack.
357 Upgrade to 4.2.8p4, or later, from the NTP Project Download
358 Page or the NTP Public Services Project Download Page.
359 If you are unable to upgrade:
360 If you are running custom refclock drivers, make sure
361 the signed datalen value is either zero or positive.
362 Monitor your ntpd instances.
363 Credit: This weakness was discovered by Yves Younan of Cisco Talos.
365 * Password Length Memory Corruption Vulnerability
367 References: Sec 2921 / CVE-2015-7854 / TALOS-CAN-0065
368 Affects: All ntp-4 releases up to, but not including 4.2.8p4, and
369 4.3.0 up to, but not including 4.3.77
370 CVSS: (AV:N/AC:H/Au:M/C:C/I:C/A:C) Base Score: 0.0 best case,
371 1.7 usual case, 6.8, worst case
372 Summary: If ntpd is configured to allow remote configuration, and if
373 the (possibly spoofed) source IP address is allowed to send
374 remote configuration requests, and if the attacker knows the
375 remote configuration password or if ntpd was (foolishly)
376 configured to disable authentication, then an attacker can
377 send a set of packets to ntpd that may cause it to crash,
378 with the hypothetical possibility of a small code injection.
381 Upgrade to 4.2.8p4, or later, from the NTP Project Download
382 Page or the NTP Public Services Project Download Page.
383 If you are unable to upgrade, remote configuration of NTF's
385 an explicitly configured "trusted" key. Only configure
387 access from a permitted IP address. You choose the IPs.
388 authentication. Don't disable it. Practice secure key safety.
389 Monitor your ntpd instances.
390 Credit: This weakness was discovered by Yves Younan and
391 Aleksander Nikolich of Cisco Talos.
393 * decodenetnum() will ASSERT botch instead of returning FAIL on some
396 References: Sec 2922 / CVE-2015-7855
397 Affects: All ntp-4 releases up to, but not including 4.2.8p4, and
398 4.3.0 up to, but not including 4.3.77
399 CVSS: (AV:N/AC:H/Au:M/C:N/I:N/A:C) Base Score: 4.6, worst case
400 Summary: If ntpd is fed a crafted mode 6 or mode 7 packet containing
401 an unusually long data value where a network address is expected,
402 the decodenetnum() function will abort with an assertion failure
403 instead of simply returning a failure condition.
406 Upgrade to 4.2.8p4, or later, from the NTP Project Download
407 Page or the NTP Public Services Project Download Page.
408 If you are unable to upgrade:
409 mode 7 is disabled by default. Don't enable it.
410 Use restrict noquery to limit who can send mode 6
412 Configure and use the controlkey and requestkey
413 authentication directives to limit who can
414 send mode 6 and mode 7 requests.
415 Monitor your ntpd instances.
416 Credit: This weakness was discovered by John D "Doug" Birdwell of IDA.org.
418 * NAK to the Future: Symmetric association authentication bypass via
421 References: Sec 2941 / CVE-2015-7871
422 Affects: All ntp-4 releases between 4.2.5p186 up to but not including
423 4.2.8p4, and 4.3.0 up to but not including 4.3.77
424 CVSS: (AV:N/AC:L/Au:N/C:N/I:P/A:P) Base Score: 6.4
425 Summary: Crypto-NAK packets can be used to cause ntpd to accept time
426 from unauthenticated ephemeral symmetric peers by bypassing the
427 authentication required to mobilize peer associations. This
428 vulnerability appears to have been introduced in ntp-4.2.5p186
429 when the code handling mobilization of new passive symmetric
430 associations (lines 1103-1165) was refactored.
433 Upgrade to 4.2.8p4, or later, from the NTP Project Download
434 Page or the NTP Public Services Project Download Page.
435 If you are unable to upgrade:
436 Apply the patch to the bottom of the "authentic" check
437 block around line 1136 of ntp_proto.c.
438 Monitor your ntpd instances.
439 Credit: This weakness was discovered by Stephen Gray <stepgray@cisco.com>.
441 Backward-Incompatible changes:
442 * [Bug 2817] Default on Linux is now "rlimit memlock -1".
443 While the general default of 32M is still the case, under Linux
444 the default value has been changed to -1 (do not lock ntpd into
445 memory). A value of 0 means "lock ntpd into memory with whatever
446 memory it needs." If your ntp.conf file has an explicit "rlimit memlock"
447 value in it, that value will continue to be used.
449 * [Bug 2886] Misspelling: "outlyer" should be "outlier".
450 If you've written a script that looks for this case in, say, the
451 output of ntpq, you probably want to change your regex matches
452 from 'outlyer' to 'outl[iy]er'.
454 New features in this release:
455 * 'rlimit memlock' now has finer-grained control. A value of -1 means
456 "don't lock ntpd into memore". This is the default for Linux boxes.
457 A value of 0 means "lock ntpd into memory" with no limits. Otherwise
458 the value is the number of megabytes of memory to lock. The default
461 * The old Google Test framework has been replaced with a new framework,
462 based on http://www.throwtheswitch.org/unity/ .
464 Bug Fixes and Improvements:
465 * [Bug 2332] (reopened) Exercise thread cancellation once before dropping
466 privileges and limiting resources in NTPD removes the need to link
467 forcefully against 'libgcc_s' which does not always work. J.Perlinger
468 * [Bug 2595] ntpdate man page quirks. Hal Murray, Harlan Stenn.
469 * [Bug 2625] Deprecate flag1 in local refclock. Hal Murray, Harlan Stenn.
470 * [Bug 2817] Stop locking ntpd into memory by default under Linux. H.Stenn.
471 * [Bug 2821] minor build issues: fixed refclock_gpsdjson.c. perlinger@ntp.org
472 * [Bug 2823] ntpsweep with recursive peers option doesn't work. H.Stenn.
473 * [Bug 2849] Systems with more than one default route may never
474 synchronize. Brian Utterback. Note that this patch might need to
475 be reverted once Bug 2043 has been fixed.
476 * [Bug 2864] 4.2.8p3 fails to compile on Windows. Juergen Perlinger
477 * [Bug 2866] segmentation fault at initgroups(). Harlan Stenn.
478 * [Bug 2867] ntpd with autokey active crashed by 'ntpq -crv'. J.Perlinger
479 * [Bug 2873] libevent should not include .deps/ in the tarball. H.Stenn
480 * [Bug 2874] Don't distribute generated sntp/tests/fileHandlingTest.h. H.Stenn
481 * [Bug 2875] sntp/Makefile.am: Get rid of DIST_SUBDIRS. libevent must
482 be configured for the distribution targets. Harlan Stenn.
483 * [Bug 2883] ntpd crashes on exit with empty driftfile. Miroslav Lichvar.
484 * [Bug 2886] Mis-spelling: "outlyer" should be "outlier". dave@horsfall.org
485 * [Bug 2888] streamline calendar functions. perlinger@ntp.org
486 * [Bug 2889] ntp-dev-4.3.67 does not build on Windows. perlinger@ntp.org
487 * [Bug 2890] Ignore ENOBUFS on routing netlink socket. Konstantin Khlebnikov.
488 * [Bug 2906] make check needs better support for pthreads. Harlan Stenn.
489 * [Bug 2907] dist* build targets require our libevent/ to be enabled. HStenn.
490 * [Bug 2912] no munlockall() under Windows. David Taylor, Harlan Stenn.
491 * libntp/emalloc.c: Remove explicit include of stdint.h. Harlan Stenn.
492 * Put Unity CPPFLAGS items in unity_config.h. Harlan Stenn.
493 * tests/ntpd/g_leapsec.cpp typo fix. Harlan Stenn.
494 * Phase 1 deprecation of google test in sntp/tests/. Harlan Stenn.
495 * On some versions of HP-UX, inttypes.h does not include stdint.h. H.Stenn.
496 * top_srcdir can change based on ntp v. sntp. Harlan Stenn.
497 * sntp/tests/ function parameter list cleanup. Damir Tomić.
498 * tests/libntp/ function parameter list cleanup. Damir Tomić.
499 * tests/ntpd/ function parameter list cleanup. Damir Tomić.
500 * sntp/unity/unity_config.h: handle stdint.h. Harlan Stenn.
501 * sntp/unity/unity_internals.h: handle *INTPTR_MAX on old Solaris. H.Stenn.
502 * tests/libntp/timevalops.c and timespecops.c fixed error printing. D.Tomić.
503 * tests/libntp/ improvements in code and fixed error printing. Damir Tomić.
504 * tests/libntp: a_md5encrypt.c, authkeys.c, buftvtots.c, calendar.c, caljulian.c,
505 caltontp.c, clocktime.c, humandate.c, hextolfp.c, decodenetnum.c - fixed
506 formatting; first declaration, then code (C90); deleted unnecessary comments;
507 changed from sprintf to snprintf; fixed order of includes. Tomasz Flendrich
508 * tests/libntp/lfpfunc.c remove unnecessary include, remove old comments,
509 fix formatting, cleanup. Tomasz Flendrich
510 * tests/libntp/lfptostr.c remove unnecessary include, add consts, fix formatting.
512 * tests/libntp/statestr.c remove empty functions, remove unnecessary include,
513 fix formatting. Tomasz Flendrich
514 * tests/libntp/modetoa.c fixed formatting. Tomasz Flendrich
515 * tests/libntp/msyslog.c fixed formatting. Tomasz Flendrich
516 * tests/libntp/numtoa.c deleted unnecessary empty functions, fixed formatting.
518 * tests/libntp/numtohost.c added const, fixed formatting. Tomasz Flendrich
519 * tests/libntp/refnumtoa.c fixed formatting. Tomasz Flendrich
520 * tests/libntp/ssl_init.c fixed formatting. Tomasz Flendrich
521 * tests/libntp/tvtots.c fixed a bug, fixed formatting. Tomasz Flendrich
522 * tests/libntp/uglydate.c removed an unnecessary include. Tomasz Flendrich
523 * tests/libntp/vi64ops.c removed an unnecessary comment, fixed formatting.
524 * tests/libntp/ymd3yd.c removed an empty function and an unnecessary include,
525 fixed formatting. Tomasz Flendrich
526 * tests/libntp/timespecops.c fixed formatting, fixed the order of includes,
527 removed unnecessary comments, cleanup. Tomasz Flendrich
528 * tests/libntp/timevalops.c fixed the order of includes, deleted unnecessary
529 comments, cleanup. Tomasz Flendrich
530 * tests/libntp/sockaddrtest.h making it agree to NTP's conventions of formatting.
532 * tests/libntp/lfptest.h cleanup. Tomasz Flendrich
533 * tests/libntp/test-libntp.c fix formatting. Tomasz Flendrich
534 * sntp/tests/crypto.c is now using proper Unity's assertions, fixed formatting.
536 * sntp/tests/kodDatabase.c added consts, deleted empty function,
537 fixed formatting. Tomasz Flendrich
538 * sntp/tests/kodFile.c cleanup, fixed formatting. Tomasz Flendrich
539 * sntp/tests/packetHandling.c is now using proper Unity's assertions,
540 fixed formatting, deleted unused variable. Tomasz Flendrich
541 * sntp/tests/keyFile.c is now using proper Unity's assertions, fixed formatting.
543 * sntp/tests/packetProcessing.c changed from sprintf to snprintf,
544 fixed formatting. Tomasz Flendrich
545 * sntp/tests/utilities.c is now using proper Unity's assertions, changed
546 the order of includes, fixed formatting, removed unnecessary comments.
548 * sntp/tests/sntptest.h fixed formatting. Tomasz Flendrich
549 * sntp/tests/fileHandlingTest.h.in fixed a possible buffer overflow problem,
550 made one function do its job, deleted unnecessary prints, fixed formatting.
552 * sntp/unity/Makefile.am added a missing header. Tomasz Flendrich
553 * sntp/unity/unity_config.h: Distribute it. Harlan Stenn.
554 * sntp/libevent/evconfig-private.h: remove generated filefrom SCM. H.Stenn.
555 * sntp/unity/Makefile.am: fix some broken paths. Harlan Stenn.
556 * sntp/unity/unity.c: Clean up a printf(). Harlan Stenn.
557 * Phase 1 deprecation of google test in tests/libntp/. Harlan Stenn.
558 * Don't build sntp/libevent/sample/. Harlan Stenn.
559 * tests/libntp/test_caltontp needs -lpthread. Harlan Stenn.
560 * br-flock: --enable-local-libevent. Harlan Stenn.
561 * Wrote tests for ntpd/ntp_prio_q.c. Tomasz Flendrich
562 * scripts/lib/NTP/Util.pm: stratum output is version-dependent. Harlan Stenn.
563 * Get rid of the NTP_ prefix on our assertion macros. Harlan Stenn.
564 * Code cleanup. Harlan Stenn.
565 * libntp/icom.c: Typo fix. Harlan Stenn.
566 * util/ntptime.c: initialization nit. Harlan Stenn.
567 * ntpd/ntp_peer.c:newpeer(): added a DEBUG_REQUIRE(srcadr). Harlan Stenn.
568 * Add std_unity_tests to various Makefile.am files. Harlan Stenn.
569 * ntpd/ntp_restrict.c: added a few assertions, created tests for this file.
571 * Changed progname to be const in many files - now it's consistent. Tomasz
573 * Typo fix for GCC warning suppression. Harlan Stenn.
574 * Added tests/ntpd/ntp_scanner.c test. Damir Tomić.
575 * Added declarations to all Unity tests, and did minor fixes to them.
576 Reduced the number of warnings by half. Damir Tomić.
577 * Updated generate_test_runner.rb and updated the sntp/unity/auto directory
578 with the latest Unity updates from Mark. Damir Tomić.
579 * Retire google test - phase I. Harlan Stenn.
580 * Unity test cleanup: move declaration of 'initializing'. Harlan Stenn.
581 * Update the NEWS file. Harlan Stenn.
582 * Autoconf cleanup. Harlan Stenn.
583 * Unit test dist cleanup. Harlan Stenn.
584 * Cleanup various test Makefile.am files. Harlan Stenn.
585 * Pthread autoconf macro cleanup. Harlan Stenn.
586 * Fix progname definition in unity runner scripts. Harlan Stenn.
587 * Clean trailing whitespace in tests/ntpd/Makefile.am. Harlan Stenn.
588 * Update the patch for bug 2817. Harlan Stenn.
589 * More updates for bug 2817. Harlan Stenn.
590 * Fix bugs in tests/ntpd/ntp_prio_q.c. Harlan Stenn.
591 * gcc on older HPUX may need +allowdups. Harlan Stenn.
592 * Adding missing MCAST protection. Harlan Stenn.
593 * Disable certain test programs on certain platforms. Harlan Stenn.
594 * Implement --enable-problem-tests (on by default). Harlan Stenn.
595 * build system tweaks. Harlan Stenn.
598 NTP 4.2.8p3 (Harlan Stenn <stenn@ntp.org>, 2015/06/29)
600 Focus: 1 Security fix. Bug fixes and enhancements. Leap-second improvements.
606 * [Sec 2853] Crafted remote config packet can crash some versions of
607 ntpd. Aleksis Kauppinen, Juergen Perlinger, Harlan Stenn.
609 Under specific circumstances an attacker can send a crafted packet to
610 cause a vulnerable ntpd instance to crash. This requires each of the
611 following to be true:
613 1) ntpd set up to allow remote configuration (not allowed by default), and
614 2) knowledge of the configuration password, and
615 3) access to a computer entrusted to perform remote configuration.
617 This vulnerability is considered low-risk.
619 New features in this release:
621 Optional (disabled by default) support to have ntpd provide smeared
622 leap second time. A specially built and configured ntpd will only
623 offer smeared time in response to client packets. These response
624 packets will also contain a "refid" of 254.a.b.c, where the 24 bits
625 of a, b, and c encode the amount of smear in a 2:22 integer:fraction
626 format. See README.leapsmear and http://bugs.ntp.org/2855 for more
629 *IF YOU CHOOSE TO CONFIGURE NTPD TO PROVIDE LEAP SMEAR TIME*
630 *BE SURE YOU DO NOT OFFER THAT TIME ON PUBLIC TIMESERVERS.*
632 We've imported the Unity test framework, and have begun converting
633 the existing google-test items to this new framework. If you want
634 to write new tests or change old ones, you'll need to have ruby
635 installed. You don't need ruby to run the test suite.
637 Bug Fixes and Improvements:
639 * CID 739725: Fix a rare resource leak in libevent/listener.c.
640 * CID 1295478: Quiet a pedantic potential error from the fix for Bug 2776.
641 * CID 1296235: Fix refclock_jjy.c and correcting type of the driver40-ja.html
642 * CID 1269537: Clean up a line of dead code in getShmTime().
643 * [Bug 1060] Buffer overruns in libparse/clk_rawdcf.c. Helge Oldach.
644 * [Bug 2590] autogen-5.18.5.
645 * [Bug 2612] restrict: Warn when 'monitor' can't be disabled because
647 * [Bug 2650] fix includefile processing.
648 * [Bug 2745] ntpd -x steps clock on leap second
649 Fixed an initial-value problem that caused misbehaviour in absence of
650 any leapsecond information.
651 Do leap second stepping only of the step adjustment is beyond the
652 proper jump distance limit and step correction is allowed at all.
653 * [Bug 2750] build for Win64
654 Building for 32bit of loopback ppsapi needs def file
655 * [Bug 2776] Improve ntpq's 'help keytype'.
656 * [Bug 2778] Implement "apeers" ntpq command to include associd.
657 * [Bug 2782] Refactor refclock_shm.c, add memory barrier protection.
658 * [Bug 2792] If the IFF_RUNNING interface flag is supported then an
659 interface is ignored as long as this flag is not set since the
660 interface is not usable (e.g., no link).
661 * [Bug 2794] Clean up kernel clock status reports.
662 * [Bug 2800] refclock_true.c true_debug() can't open debug log because
663 of incompatible open/fdopen parameters.
664 * [Bug 2804] install-local-data assumes GNU 'find' semantics.
665 * [Bug 2805] ntpd fails to join multicast group.
666 * [Bug 2806] refclock_jjy.c supports the Telephone JJY.
667 * [Bug 2808] GPSD_JSON driver enhancements, step 1.
668 Fix crash during cleanup if GPS device not present and char device.
669 Increase internal token buffer to parse all JSON data, even SKY.
670 Defer logging of errors during driver init until the first unit is
671 started, so the syslog is not cluttered when the driver is not used.
672 Various improvements, see http://bugs.ntp.org/2808 for details.
673 Changed libjsmn to a more recent version.
674 * [Bug 2810] refclock_shm.c memory barrier code needs tweaks for QNX.
675 * [Bug 2813] HP-UX needs -D__STDC_VERSION__=199901L and limits.h.
676 * [Bug 2815] net-snmp before v5.4 has circular library dependencies.
677 * [Bug 2821] Add a missing NTP_PRINTF and a missing const.
678 * [Bug 2822] New leap column in sntp broke NTP::Util.pm.
679 * [Bug 2824] Convert update-leap to perl. (also see 2769)
680 * [Bug 2825] Quiet file installation in html/ .
681 * [Bug 2830] ntpd doesn't always transfer the correct TAI offset via autokey
682 NTPD transfers the current TAI (instead of an announcement) now.
683 This might still needed improvement.
684 Update autokey data ASAP when 'sys_tai' changes.
685 Fix unit test that was broken by changes for autokey update.
686 Avoid potential signature length issue and use DPRINTF where possible
688 * [Bug 2832] refclock_jjy.c supports the TDC-300.
689 * [Bug 2834] Correct a broken html tag in html/refclock.html
690 * [Bug 2836] DFC77 patches from Frank Kardel to make decoding more
691 robust, and require 2 consecutive timestamps to be consistent.
692 * [Bug 2837] Allow a configurable DSCP value.
693 * [Bug 2837] add test for DSCP to ntpd/complete.conf.in
694 * [Bug 2842] Glitch in ntp.conf.def documentation stanza.
695 * [Bug 2842] Bug in mdoc2man.
696 * [Bug 2843] make check fails on 4.3.36
697 Fixed compiler warnings about numeric range overflow
698 (The original topic was fixed in a byplay to bug#2830)
699 * [Bug 2845] Harden memory allocation in ntpd.
700 * [Bug 2852] 'make check' can't find unity.h. Hal Murray.
701 * [Bug 2854] Missing brace in libntp/strdup.c. Masanari Iida.
702 * [Bug 2855] Parser fix for conditional leap smear code. Harlan Stenn.
703 * [Bug 2855] Report leap smear in the REFID. Harlan Stenn.
704 * [Bug 2855] Implement conditional leap smear code. Martin Burnicki.
705 * [Bug 2856] ntpd should wait() on terminated child processes. Paul Green.
706 * [Bug 2857] Stratus VOS does not support SIGIO. Paul Green.
707 * [Bug 2859] Improve raw DCF77 robustness deconding. Frank Kardel.
708 * [Bug 2860] ntpq ifstats sanity check is too stringent. Frank Kardel.
709 * html/drivers/driver22.html: typo fix. Harlan Stenn.
710 * refidsmear test cleanup. Tomasz Flendrich.
711 * refidsmear function support and tests. Harlan Stenn.
712 * sntp/tests/Makefile.am: remove g_nameresolution.cpp as it tested
713 something that was only in the 4.2.6 sntp. Harlan Stenn.
714 * Modified tests/bug-2803/Makefile.am so it builds Unity framework tests.
716 * Modified tests/libtnp/Makefile.am so it builds Unity framework tests.
718 * Modified sntp/tests/Makefile.am so it builds Unity framework tests.
720 * tests/sandbox/smeartest.c: Harlan Stenn, Damir Tomic, Juergen Perlinger.
721 * Converted from gtest to Unity: tests/bug-2803/. Damir Tomić
722 * Converted from gtest to Unity: tests/libntp/ a_md5encrypt, atoint.c,
723 atouint.c, authkeys.c, buftvtots.c, calendar.c, caljulian.c,
724 calyearstart.c, clocktime.c, hextoint.c, lfpfunc.c, modetoa.c,
725 numtoa.c, numtohost.c, refnumtoa.c, ssl_init.c, statestr.c,
726 timespecops.c, timevalops.c, uglydate.c, vi64ops.c, ymd2yd.c.
728 * Converted from gtest to Unity: sntp/tests/ kodDatabase.c, kodFile.c,
729 networking.c, keyFile.c, utilities.cpp, sntptest.h,
730 fileHandlingTest.h. Damir Tomić
731 * Initial support for experimental leap smear code. Harlan Stenn.
732 * Fixes to sntp/tests/fileHandlingTest.h.in. Harlan Stenn.
733 * Report select() debug messages at debug level 3 now.
734 * sntp/scripts/genLocInfo: treat raspbian as debian.
735 * Unity test framework fixes.
736 ** Requires ruby for changes to tests.
737 * Initial support for PACKAGE_VERSION tests.
738 * sntp/libpkgver belongs in EXTRA_DIST, not DIST_SUBDIRS.
739 * tests/bug-2803/Makefile.am must distribute bug-2803.h.
740 * Add an assert to the ntpq ifstats code.
741 * Clean up the RLIMIT_STACK code.
742 * Improve the ntpq documentation around the controlkey keyid.
744 * Windows port build cleanup.
747 NTP 4.2.8p2 (Harlan Stenn <stenn@ntp.org>, 2015/04/07)
749 Focus: Security and Bug fixes, enhancements.
753 In addition to bug fixes and enhancements, this release fixes the
754 following medium-severity vulnerabilities involving private key
757 * [Sec 2779] ntpd accepts unauthenticated packets with symmetric key crypto.
759 References: Sec 2779 / CVE-2015-1798 / VU#374268
760 Affects: All NTP4 releases starting with ntp-4.2.5p99 up to but not
761 including ntp-4.2.8p2 where the installation uses symmetric keys
762 to authenticate remote associations.
763 CVSS: (AV:A/AC:M/Au:N/C:P/I:P/A:P) Base Score: 5.4
764 Date Resolved: Stable (4.2.8p2) 07 Apr 2015
765 Summary: When ntpd is configured to use a symmetric key to authenticate
766 a remote NTP server/peer, it checks if the NTP message
767 authentication code (MAC) in received packets is valid, but not if
768 there actually is any MAC included. Packets without a MAC are
769 accepted as if they had a valid MAC. This allows a MITM attacker to
770 send false packets that are accepted by the client/peer without
771 having to know the symmetric key. The attacker needs to know the
772 transmit timestamp of the client to match it in the forged reply
773 and the false reply needs to reach the client before the genuine
774 reply from the server. The attacker doesn't necessarily need to be
775 relaying the packets between the client and the server.
777 Authentication using autokey doesn't have this problem as there is
778 a check that requires the key ID to be larger than NTP_MAXKEY,
779 which fails for packets without a MAC.
781 Upgrade to 4.2.8p2, or later, from the NTP Project Download Page
782 or the NTP Public Services Project Download Page
783 Configure ntpd with enough time sources and monitor it properly.
784 Credit: This issue was discovered by Miroslav Lichvar, of Red Hat.
786 * [Sec 2781] Authentication doesn't protect symmetric associations against
789 References: Sec 2781 / CVE-2015-1799 / VU#374268
790 Affects: All NTP releases starting with at least xntp3.3wy up to but
791 not including ntp-4.2.8p2 where the installation uses symmetric
793 CVSS: (AV:A/AC:M/Au:N/C:P/I:P/A:P) Base Score: 5.4
794 Note: the CVSS base Score for this issue could be 4.3 or lower, and
795 it could be higher than 5.4.
796 Date Resolved: Stable (4.2.8p2) 07 Apr 2015
797 Summary: An attacker knowing that NTP hosts A and B are peering with
798 each other (symmetric association) can send a packet to host A
799 with source address of B which will set the NTP state variables
800 on A to the values sent by the attacker. Host A will then send
801 on its next poll to B a packet with originate timestamp that
802 doesn't match the transmit timestamp of B and the packet will
803 be dropped. If the attacker does this periodically for both
804 hosts, they won't be able to synchronize to each other. This is
805 a known denial-of-service attack, described at
806 https://www.eecis.udel.edu/~mills/onwire.html .
808 According to the document the NTP authentication is supposed to
809 protect symmetric associations against this attack, but that
810 doesn't seem to be the case. The state variables are updated even
811 when authentication fails and the peers are sending packets with
812 originate timestamps that don't match the transmit timestamps on
815 This seems to be a very old problem, dating back to at least
816 xntp3.3wy. It's also in the NTPv3 (RFC 1305) and NTPv4 (RFC 5905)
817 specifications, so other NTP implementations with support for
818 symmetric associations and authentication may be vulnerable too.
819 An update to the NTP RFC to correct this error is in-process.
821 Upgrade to 4.2.8p2, or later, from the NTP Project Download Page
822 or the NTP Public Services Project Download Page
823 Note that for users of autokey, this specific style of MITM attack
824 is simply a long-known potential problem.
825 Configure ntpd with appropriate time sources and monitor ntpd.
826 Alert your staff if problems are detected.
827 Credit: This issue was discovered by Miroslav Lichvar, of Red Hat.
829 * New script: update-leap
830 The update-leap script will verify and if necessary, update the
831 leap-second definition file.
832 It requires the following commands in order to work:
834 wget logger tr sed shasum
836 Some may choose to run this from cron. It needs more portability testing.
838 Bug Fixes and Improvements:
840 * [Bug 1787] DCF77's formerly "antenna" bit is "call bit" since 2003.
841 * [Bug 1960] setsockopt IPV6_MULTICAST_IF: Invalid argument.
842 * [Bug 2346] "graceful termination" signals do not do peer cleanup.
843 * [Bug 2728] See if C99-style structure initialization works.
844 * [Bug 2747] Upgrade libevent to 2.1.5-beta.
845 * [Bug 2749] ntp/lib/NTP/Util.pm needs update for ntpq -w, IPv6, .POOL. .
846 * [Bug 2751] jitter.h has stale copies of l_fp macros.
847 * [Bug 2756] ntpd hangs in startup with gcc 3.3.5 on ARM.
848 * [Bug 2757] Quiet compiler warnings.
849 * [Bug 2759] Expose nonvolatile/clk_wander_threshold to ntpq.
850 * [Bug 2763] Allow different thresholds for forward and backward steps.
851 * [Bug 2766] ntp-keygen output files should not be world-readable.
852 * [Bug 2767] ntp-keygen -M should symlink to ntp.keys.
853 * [Bug 2771] nonvolatile value is documented in wrong units.
854 * [Bug 2773] Early leap announcement from Palisade/Thunderbolt
855 * [Bug 2774] Unreasonably verbose printout - leap pending/warning
856 * [Bug 2775] ntp-keygen.c fails to compile under Windows.
857 * [Bug 2777] Fixed loops and decoding of Meinberg GPS satellite info.
858 Removed non-ASCII characters from some copyright comments.
859 Removed trailing whitespace.
860 Updated definitions for Meinberg clocks from current Meinberg header files.
861 Now use C99 fixed-width types and avoid non-ASCII characters in comments.
862 Account for updated definitions pulled from Meinberg header files.
863 Updated comments on Meinberg GPS receivers which are not only called GPS16x.
864 Replaced some constant numbers by defines from ntp_calendar.h
865 Modified creation of parse-specific variables for Meinberg devices
867 Reworked mk_utcinfo() to avoid printing of ambiguous leap second dates.
868 Modified mbg_tm_str() which now expexts an additional parameter controlling
869 if the time status shall be printed.
870 * [Sec 2779] ntpd accepts unauthenticated packets with symmetric key crypto.
871 * [Sec 2781] Authentication doesn't protect symmetric associations against
873 * [Bug 2783] Quiet autoconf warnings about missing AC_LANG_SOURCE.
874 * [Bug 2789] Quiet compiler warnings from libevent.
875 * [Bug 2790] If ntpd sets the Windows MM timer highest resolution
876 pause briefly before measuring system clock precision to yield
878 * Comment from Juergen Perlinger in ntp_calendar.c to make the code clearer.
879 * Use predefined function types for parse driver functions
880 used to set up function pointers.
881 Account for changed prototype of parse_inp_fnc_t functions.
882 Cast parse conversion results to appropriate types to avoid
884 Let ioctl() for Windows accept a (void *) to avoid compiler warnings
885 when called with pointers to different types.
888 NTP 4.2.8p1 (Harlan Stenn <stenn@ntp.org>, 2015/02/04)
890 Focus: Security and Bug fixes, enhancements.
894 In addition to bug fixes and enhancements, this release fixes the
895 following high-severity vulnerabilities:
897 * vallen is not validated in several places in ntp_crypto.c, leading
898 to a potential information leak or possibly a crash
900 References: Sec 2671 / CVE-2014-9297 / VU#852879
901 Affects: All NTP4 releases before 4.2.8p1 that are running autokey.
902 CVSS: (AV:N/AC:L/Au:N/C:P/I:P/A:P) Base Score: 7.5
903 Date Resolved: Stable (4.2.8p1) 04 Feb 2015
904 Summary: The vallen packet value is not validated in several code
905 paths in ntp_crypto.c which can lead to information leakage
906 or perhaps a crash of the ntpd process.
908 Upgrade to 4.2.8p1, or later, from the NTP Project Download Page
909 or the NTP Public Services Project Download Page.
910 Disable Autokey Authentication by removing, or commenting out,
911 all configuration directives beginning with the "crypto"
912 keyword in your ntp.conf file.
913 Credit: This vulnerability was discovered by Stephen Roettger of the
914 Google Security Team, with additional cases found by Sebastian
915 Krahmer of the SUSE Security Team and Harlan Stenn of Network
918 * ::1 can be spoofed on some OSes, so ACLs based on IPv6 ::1 addresses
921 References: Sec 2672 / CVE-2014-9298 / VU#852879
922 Affects: All NTP4 releases before 4.2.8p1, under at least some
923 versions of MacOS and Linux. *BSD has not been seen to be vulnerable.
924 CVSS: (AV:N/AC:L/Au:N/C:P/I:P/A:C) Base Score: 9
925 Date Resolved: Stable (4.2.8p1) 04 Feb 2014
926 Summary: While available kernels will prevent 127.0.0.1 addresses
927 from "appearing" on non-localhost IPv4 interfaces, some kernels
928 do not offer the same protection for ::1 source addresses on
929 IPv6 interfaces. Since NTP's access control is based on source
930 address and localhost addresses generally have no restrictions,
931 an attacker can send malicious control and configuration packets
932 by spoofing ::1 addresses from the outside. Note Well: This is
933 not really a bug in NTP, it's a problem with some OSes. If you
934 have one of these OSes where ::1 can be spoofed, ALL ::1 -based
935 ACL restrictions on any application can be bypassed!
937 Upgrade to 4.2.8p1, or later, from the NTP Project Download Page
938 or the NTP Public Services Project Download Page
939 Install firewall rules to block packets claiming to come from
940 ::1 from inappropriate network interfaces.
941 Credit: This vulnerability was discovered by Stephen Roettger of
942 the Google Security Team.
944 Additionally, over 30 bugfixes and improvements were made to the codebase.
945 See the ChangeLog for more information.
948 NTP 4.2.8 (Harlan Stenn <stenn@ntp.org>, 2014/12/18)
950 Focus: Security and Bug fixes, enhancements.
954 In addition to bug fixes and enhancements, this release fixes the
955 following high-severity vulnerabilities:
957 ************************** vv NOTE WELL vv *****************************
959 The vulnerabilities listed below can be significantly mitigated by
960 following the BCP of putting
962 restrict default ... noquery
964 in the ntp.conf file. With the exception of:
966 receive(): missing return on error
967 References: Sec 2670 / CVE-2014-9296 / VU#852879
969 below (which is a limited-risk vulnerability), none of the recent
970 vulnerabilities listed below can be exploited if the source IP is
971 restricted from sending a 'query'-class packet by your ntp.conf file.
973 ************************** ^^ NOTE WELL ^^ *****************************
975 * Weak default key in config_auth().
977 References: [Sec 2665] / CVE-2014-9293 / VU#852879
978 CVSS: (AV:N/AC:L/Au:M/C:P/I:P/A:C) Base Score: 7.3
979 Vulnerable Versions: all releases prior to 4.2.7p11
980 Date Resolved: 28 Jan 2010
982 Summary: If no 'auth' key is set in the configuration file, ntpd
983 would generate a random key on the fly. There were two
984 problems with this: 1) the generated key was 31 bits in size,
985 and 2) it used the (now weak) ntp_random() function, which was
986 seeded with a 32-bit value and could only provide 32 bits of
987 entropy. This was sufficient back in the late 1990s when the
988 code was written. Not today.
991 - Upgrade to 4.2.7p11 or later.
992 - Follow BCP and put 'restrict ... noquery' in your ntp.conf file.
994 Credit: This vulnerability was noticed in ntp-4.2.6 by Neel Mehta
995 of the Google Security Team.
997 * Non-cryptographic random number generator with weak seed used by
998 ntp-keygen to generate symmetric keys.
1000 References: [Sec 2666] / CVE-2014-9294 / VU#852879
1001 CVSS: (AV:N/AC:L/Au:M/C:P/I:P/A:C) Base Score: 7.3
1002 Vulnerable Versions: All NTP4 releases before 4.2.7p230
1003 Date Resolved: Dev (4.2.7p230) 01 Nov 2011
1005 Summary: Prior to ntp-4.2.7p230 ntp-keygen used a weak seed to
1006 prepare a random number generator that was of good quality back
1007 in the late 1990s. The random numbers produced was then used to
1008 generate symmetric keys. In ntp-4.2.8 we use a current-technology
1009 cryptographic random number generator, either RAND_bytes from
1010 OpenSSL, or arc4random().
1012 Mitigation - any of:
1013 - Upgrade to 4.2.7p230 or later.
1014 - Follow BCP and put 'restrict ... noquery' in your ntp.conf file.
1016 Credit: This vulnerability was discovered in ntp-4.2.6 by
1017 Stephen Roettger of the Google Security Team.
1019 * Buffer overflow in crypto_recv()
1021 References: Sec 2667 / CVE-2014-9295 / VU#852879
1022 CVSS: (AV:N/AC:L/Au:N/C:P/I:P/A:P) Base Score: 7.5
1023 Versions: All releases before 4.2.8
1024 Date Resolved: Stable (4.2.8) 18 Dec 2014
1026 Summary: When Autokey Authentication is enabled (i.e. the ntp.conf
1027 file contains a 'crypto pw ...' directive) a remote attacker
1028 can send a carefully crafted packet that can overflow a stack
1029 buffer and potentially allow malicious code to be executed
1030 with the privilege level of the ntpd process.
1032 Mitigation - any of:
1033 - Upgrade to 4.2.8, or later, or
1034 - Disable Autokey Authentication by removing, or commenting out,
1035 all configuration directives beginning with the crypto keyword
1036 in your ntp.conf file.
1038 Credit: This vulnerability was discovered by Stephen Roettger of the
1039 Google Security Team.
1041 * Buffer overflow in ctl_putdata()
1043 References: Sec 2668 / CVE-2014-9295 / VU#852879
1044 CVSS: (AV:N/AC:L/Au:N/C:P/I:P/A:P) Base Score: 7.5
1045 Versions: All NTP4 releases before 4.2.8
1046 Date Resolved: Stable (4.2.8) 18 Dec 2014
1048 Summary: A remote attacker can send a carefully crafted packet that
1049 can overflow a stack buffer and potentially allow malicious
1050 code to be executed with the privilege level of the ntpd process.
1052 Mitigation - any of:
1053 - Upgrade to 4.2.8, or later.
1054 - Follow BCP and put 'restrict ... noquery' in your ntp.conf file.
1056 Credit: This vulnerability was discovered by Stephen Roettger of the
1057 Google Security Team.
1059 * Buffer overflow in configure()
1061 References: Sec 2669 / CVE-2014-9295 / VU#852879
1062 CVSS: (AV:N/AC:L/Au:N/C:P/I:P/A:P) Base Score: 7.5
1063 Versions: All NTP4 releases before 4.2.8
1064 Date Resolved: Stable (4.2.8) 18 Dec 2014
1066 Summary: A remote attacker can send a carefully crafted packet that
1067 can overflow a stack buffer and potentially allow malicious
1068 code to be executed with the privilege level of the ntpd process.
1070 Mitigation - any of:
1071 - Upgrade to 4.2.8, or later.
1072 - Follow BCP and put 'restrict ... noquery' in your ntp.conf file.
1074 Credit: This vulnerability was discovered by Stephen Roettger of the
1075 Google Security Team.
1077 * receive(): missing return on error
1079 References: Sec 2670 / CVE-2014-9296 / VU#852879
1080 CVSS: (AV:N/AC:L/Au:N/C:N/I:N/A:P) Base Score: 5.0
1081 Versions: All NTP4 releases before 4.2.8
1082 Date Resolved: Stable (4.2.8) 18 Dec 2014
1084 Summary: Code in ntp_proto.c:receive() was missing a 'return;' in
1085 the code path where an error was detected, which meant
1086 processing did not stop when a specific rare error occurred.
1087 We haven't found a way for this bug to affect system integrity.
1088 If there is no way to affect system integrity the base CVSS
1089 score for this bug is 0. If there is one avenue through which
1090 system integrity can be partially affected, the base score
1091 becomes a 5. If system integrity can be partially affected
1092 via all three integrity metrics, the CVSS base score become 7.5.
1094 Mitigation - any of:
1095 - Upgrade to 4.2.8, or later,
1096 - Remove or comment out all configuration directives
1097 beginning with the crypto keyword in your ntp.conf file.
1099 Credit: This vulnerability was discovered by Stephen Roettger of the
1100 Google Security Team.
1102 See http://support.ntp.org/security for more information.
1104 New features / changes in this release:
1108 * Internal NTP Era counters
1110 The internal counters that track the "era" (range of years) we are in
1111 rolls over every 136 years'. The current "era" started at the stroke of
1112 midnight on 1 Jan 1900, and ends just before the stroke of midnight on
1114 In the past, we have used the "midpoint" of the range to decide which
1115 era we were in. Given the longevity of some products, it became clear
1116 that it would be more functional to "look back" less, and "look forward"
1117 more. We now compile a timestamp into the ntpd executable and when we
1118 get a timestamp we us the "built-on" to tell us what era we are in.
1119 This check "looks back" 10 years, and "looks forward" 126 years.
1121 * ntpdc responses disabled by default
1125 For a long time, ntpq and its mostly text-based mode 6 (control)
1126 protocol have been preferred over ntpdc and its mode 7 (private
1127 request) protocol for runtime queries and configuration. There has
1128 been a goal of deprecating ntpdc, previously held back by numerous
1129 capabilities exposed by ntpdc with no ntpq equivalent. I have been
1130 adding commands to ntpq to cover these cases, and I believe I've
1131 covered them all, though I've not compared command-by-command
1134 As I've said previously, the binary mode 7 protocol involves a lot of
1135 hand-rolled structure layout and byte-swapping code in both ntpd and
1136 ntpdc which is hard to get right. As ntpd grows and changes, the
1137 changes are difficult to expose via ntpdc while maintaining forward
1138 and backward compatibility between ntpdc and ntpd. In contrast,
1139 ntpq's text-based, label=value approach involves more code reuse and
1140 allows compatible changes without extra work in most cases.
1142 Mode 7 has always been defined as vendor/implementation-specific while
1143 mode 6 is described in RFC 1305 and intended to be open to interoperate
1144 with other implementations. There is an early draft of an updated
1145 mode 6 description that likely will join the other NTPv4 RFCs
1146 eventually. (http://tools.ietf.org/html/draft-odonoghue-ntpv4-control-01)
1148 For these reasons, ntpd 4.2.7p230 by default disables processing of
1149 ntpdc queries, reducing ntpd's attack surface and functionally
1150 deprecating ntpdc. If you are in the habit of using ntpdc for certain
1151 operations, please try the ntpq equivalent. If there's no equivalent,
1152 please open a bug report at http://bugs.ntp.org./
1154 In addition to the above, over 1100 issues have been resolved between
1155 the 4.2.6 branch and 4.2.8. The ChangeLog file in the distribution
1159 NTP 4.2.6p5 (Harlan Stenn <stenn@ntp.org>, 2011/12/24)
1165 This is a recommended upgrade.
1167 This release updates sys_rootdisp and sys_jitter calculations to match the
1168 RFC specification, fixes a potential IPv6 address matching error for the
1169 "nic" and "interface" configuration directives, suppresses the creation of
1170 extraneous ephemeral associations for certain broadcastclient and
1171 multicastclient configurations, cleans up some ntpq display issues, and
1172 includes improvements to orphan mode, minor bugs fixes and code clean-ups.
1174 New features / changes in this release:
1178 * Updated "nic" and "interface" IPv6 address handling to prevent
1179 mismatches with localhost [::1] and wildcard [::] which resulted from
1180 using the address/prefix format (e.g. fe80::/64)
1181 * Fix orphan mode stratum incorrectly counting to infinity
1182 * Orphan parent selection metric updated to includes missing ntohl()
1183 * Non-printable stratum 16 refid no longer sent to ntp
1184 * Duplicate ephemeral associations suppressed for broadcastclient and
1185 multicastclient without broadcastdelay
1186 * Exclude undetermined sys_refid from use in loopback TEST12
1187 * Exclude MODE_SERVER responses from KoD rate limiting
1188 * Include root delay in clock_update() sys_rootdisp calculations
1189 * get_systime() updated to exclude sys_residual offset (which only
1190 affected bits "below" sys_tick, the precision threshold)
1191 * sys.peer jitter weighting corrected in sys_jitter calculation
1195 * -n option extended to include the billboard "server" column
1196 * IPv6 addresses in the local column truncated to prevent overruns
1199 NTP 4.2.6p4 (Harlan Stenn <stenn@ntp.org>, 2011/09/22)
1201 Focus: Bug fixes and portability improvements
1205 This is a recommended upgrade.
1207 This release includes build infrastructure updates, code
1208 clean-ups, minor bug fixes, fixes for a number of minor
1209 ref-clock issues, and documentation revisions.
1211 Portability improvements affect AIX, HP-UX, Linux, OS X and 64-bit time_t.
1213 New features / changes in this release:
1217 * Fix checking for struct rtattr
1218 * Update config.guess and config.sub for AIX
1219 * Upgrade required version of autogen and libopts for building
1220 from our source code repository
1224 * Back-ported several fixes for Coverity warnings from ntp-dev
1225 * Fix a rare boundary condition in UNLINK_EXPR_SLIST()
1226 * Allow "logconfig =allall" configuration directive
1227 * Bind tentative IPv6 addresses on Linux
1228 * Correct WWVB/Spectracom driver to timestamp CR instead of LF
1229 * Improved tally bit handling to prevent incorrect ntpq peer status reports
1230 * Exclude the Undisciplined Local Clock and ACTS drivers from the initial
1231 candidate list unless they are designated a "prefer peer"
1232 * Prevent the consideration of Undisciplined Local Clock or ACTS drivers for
1233 selection during the 'tos orphanwait' period
1234 * Prefer an Orphan Mode Parent over the Undisciplined Local Clock or ACTS
1236 * Improved support of the Parse Refclock trusttime flag in Meinberg mode
1237 * Back-port utility routines from ntp-dev: mprintf(), emalloc_zero()
1238 * Added the NTPD_TICKADJ_PPM environment variable for specifying baseline
1239 clock slew on Microsoft Windows
1240 * Code cleanup in libntpq
1244 * Fix timerstats reporting
1248 * Reduce time required to set clock
1249 * Allow a timeout greater than 2 seconds
1253 * Backward incompatible command-line option change:
1254 -l/--filelog changed -l/--logfile (to be consistent with ntpd)
1258 * Update html2man. Fix some tags in the .html files
1259 * Distribute ntp-wait.html
1262 NTP 4.2.6p3 (Harlan Stenn <stenn@ntp.org>, 2011/01/03)
1264 Focus: Bug fixes and portability improvements
1268 This is a recommended upgrade.
1270 This release includes build infrastructure updates, code
1271 clean-ups, minor bug fixes, fixes for a number of minor
1272 ref-clock issues, and documentation revisions.
1274 Portability improvements in this release affect AIX, Atari FreeMiNT,
1275 FreeBSD4, Linux and Microsoft Windows.
1277 New features / changes in this release:
1280 * Use lsb_release to get information about Linux distributions.
1281 * 'test' is in /usr/bin (instead of /bin) on some systems.
1282 * Basic sanity checks for the ChangeLog file.
1283 * Source certain build files with ./filename for systems without . in PATH.
1284 * IRIX portability fix.
1285 * Use a single copy of the "libopts" code.
1286 * autogen/libopts upgrade.
1287 * configure.ac m4 quoting cleanup.
1290 * Do not bind to IN6_IFF_ANYCAST addresses.
1291 * Log the reason for exiting under Windows.
1292 * Multicast fixes for Windows.
1293 * Interpolation fixes for Windows.
1294 * IPv4 and IPv6 Multicast fixes.
1295 * Manycast solicitation fixes and general repairs.
1296 * JJY refclock cleanup.
1297 * NMEA refclock improvements.
1298 * Oncore debug message cleanup.
1299 * Palisade refclock now builds under Linux.
1300 * Give RAWDCF more baud rates.
1301 * Support Truetime Satellite clocks under Windows.
1302 * Support Arbiter 1093C Satellite clocks under Windows.
1303 * Make sure that the "filegen" configuration command defaults to "enable".
1304 * Range-check the status codes (plus other cleanup) in the RIPE-NCC driver.
1305 * Prohibit 'includefile' directive in remote configuration command.
1306 * Fix 'nic' interface bindings.
1307 * Fix the way we link with openssl if openssl is installed in the base
1312 * OpenSSL version display cleanup.
1315 * Many counters should be treated as unsigned.
1318 * Do not ignore replies with equal receive and transmit timestamps.
1321 * libntpq warning cleanup.
1324 * Correct SNMP type for "precision" and "resolution".
1325 * Update the MIB from the draft version to RFC-5907.
1328 * Display timezone offset when showing time for sntp in the local
1330 * Pay proper attention to RATE KoD packets.
1331 * Fix a miscalculation of the offset.
1332 * Properly parse empty lines in the key file.
1334 * Use tv_usec correctly in set_time().
1335 * Documentation cleanup.
1338 NTP 4.2.6p2 (Harlan Stenn <stenn@ntp.org>, 2010/07/08)
1340 Focus: Bug fixes and portability improvements
1344 This is a recommended upgrade.
1346 This release includes build infrastructure updates, code
1347 clean-ups, minor bug fixes, fixes for a number of minor
1348 ref-clock issues, improved KOD handling, OpenSSL related
1349 updates and documentation revisions.
1351 Portability improvements in this release affect Irix, Linux,
1352 Mac OS, Microsoft Windows, OpenBSD and QNX6
1354 New features / changes in this release:
1357 * Range syntax for the trustedkey configuration directive
1358 * Unified IPv4 and IPv6 restrict lists
1361 * Rate limiting and KOD handling
1364 * default connection to net-snmpd via a unix-domain socket
1365 * command-line 'socket name' option
1368 * support for the "passwd ..." syntax
1369 * key-type specific password prompts
1372 * MD5 authentication of an ntpd
1373 * Broadcast and crypto
1377 NTP 4.2.6p1 (Harlan Stenn <stenn@ntp.org>, 2010/04/09)
1379 Focus: Bug fixes, portability fixes, and documentation improvements
1383 This is a recommended upgrade.
1386 NTP 4.2.6 (Harlan Stenn <stenn@ntp.org>, 2009/12/08)
1388 Focus: enhancements and bug fixes.
1391 NTP 4.2.4p8 (Harlan Stenn <stenn@ntp.org>, 2009/12/08)
1393 Focus: Security Fixes
1397 This release fixes the following high-severity vulnerability:
1399 * [Sec 1331] DoS with mode 7 packets - CVE-2009-3563.
1401 See http://support.ntp.org/security for more information.
1403 NTP mode 7 (MODE_PRIVATE) is used by the ntpdc query and control utility.
1404 In contrast, ntpq uses NTP mode 6 (MODE_CONTROL), while routine NTP time
1405 transfers use modes 1 through 5. Upon receipt of an incorrect mode 7
1406 request or a mode 7 error response from an address which is not listed
1407 in a "restrict ... noquery" or "restrict ... ignore" statement, ntpd will
1408 reply with a mode 7 error response (and log a message). In this case:
1410 * If an attacker spoofs the source address of ntpd host A in a
1411 mode 7 response packet sent to ntpd host B, both A and B will
1412 continuously send each other error responses, for as long as
1413 those packets get through.
1415 * If an attacker spoofs an address of ntpd host A in a mode 7
1416 response packet sent to ntpd host A, A will respond to itself
1417 endlessly, consuming CPU and logging excessively.
1419 Credit for finding this vulnerability goes to Robin Park and Dmitri
1420 Vinokurov of Alcatel-Lucent.
1422 THIS IS A STRONGLY RECOMMENDED UPGRADE.
1425 ntpd now syncs to refclocks right away.
1427 Backward-Incompatible changes:
1429 ntpd no longer accepts '-v name' or '-V name' to define internal variables.
1430 Use '--var name' or '--dvar name' instead. (Bug 817)
1433 NTP 4.2.4p7 (Harlan Stenn <stenn@ntp.org>, 2009/05/04)
1435 Focus: Security and Bug Fixes
1439 This release fixes the following high-severity vulnerability:
1441 * [Sec 1151] Remote exploit if autokey is enabled. CVE-2009-1252
1443 See http://support.ntp.org/security for more information.
1445 If autokey is enabled (if ntp.conf contains a "crypto pw whatever"
1446 line) then a carefully crafted packet sent to the machine will cause
1447 a buffer overflow and possible execution of injected code, running
1448 with the privileges of the ntpd process (often root).
1450 Credit for finding this vulnerability goes to Chris Ries of CMU.
1452 This release fixes the following low-severity vulnerabilities:
1454 * [Sec 1144] limited (two byte) buffer overflow in ntpq. CVE-2009-0159
1455 Credit for finding this vulnerability goes to Geoff Keating of Apple.
1457 * [Sec 1149] use SO_EXCLUSIVEADDRUSE on Windows
1458 Credit for finding this issue goes to Dave Hart.
1460 This release fixes a number of bugs and adds some improvements:
1463 * Fix many compiler warnings
1464 * Many fixes and improvements for Windows
1465 * Adds support for AIX 6.1
1466 * Resolves some issues under MacOS X and Solaris
1468 THIS IS A STRONGLY RECOMMENDED UPGRADE.
1471 NTP 4.2.4p6 (Harlan Stenn <stenn@ntp.org>, 2009/01/07)
1477 This release fixes oCERT.org's CVE-2009-0021, a vulnerability affecting
1478 the OpenSSL library relating to the incorrect checking of the return
1479 value of EVP_VerifyFinal function.
1481 Credit for finding this issue goes to the Google Security Team for
1482 finding the original issue with OpenSSL, and to ocert.org for finding
1483 the problem in NTP and telling us about it.
1485 This is a recommended upgrade.
1487 NTP 4.2.4p5 (Harlan Stenn <stenn@ntp.org>, 2008/08/17)
1489 Focus: Minor Bugfixes
1491 This release fixes a number of Windows-specific ntpd bugs and
1492 platform-independent ntpdate bugs. A logging bugfix has been applied
1493 to the ONCORE driver.
1495 The "dynamic" keyword and is now obsolete and deferred binding to local
1496 interfaces is the new default. The minimum time restriction for the
1497 interface update interval has been dropped.
1499 A number of minor build system and documentation fixes are included.
1501 This is a recommended upgrade for Windows.
1504 NTP 4.2.4p4 (Harlan Stenn <stenn@ntp.org>, 2007/09/10)
1506 Focus: Minor Bugfixes
1508 This release updates certain copyright information, fixes several display
1509 bugs in ntpdc, avoids SIGIO interrupting malloc(), cleans up file descriptor
1510 shutdown in the parse refclock driver, removes some lint from the code,
1511 stops accessing certain buffers immediately after they were freed, fixes
1512 a problem with non-command-line specification of -6, and allows the loopback
1513 interface to share addresses with other interfaces.
1516 NTP 4.2.4p3 (Harlan Stenn <stenn@ntp.org>, 2007/06/29)
1518 Focus: Minor Bugfixes
1520 This release fixes a bug in Windows that made it difficult to
1521 terminate ntpd under windows.
1522 This is a recommended upgrade for Windows.
1525 NTP 4.2.4p2 (Harlan Stenn <stenn@ntp.org>, 2007/06/19)
1527 Focus: Minor Bugfixes
1529 This release fixes a multicast mode authentication problem,
1530 an error in NTP packet handling on Windows that could lead to
1531 ntpd crashing, and several other minor bugs. Handling of
1532 multicast interfaces and logging configuration were improved.
1533 The required versions of autogen and libopts were incremented.
1534 This is a recommended upgrade for Windows and multicast users.
1537 NTP 4.2.4 (Harlan Stenn <stenn@ntp.org>, 2006/12/31)
1539 Focus: enhancements and bug fixes.
1541 Dynamic interface rescanning was added to simplify the use of ntpd in
1542 conjunction with DHCP. GNU AutoGen is used for its command-line options
1543 processing. Separate PPS devices are supported for PARSE refclocks, MD5
1544 signatures are now provided for the release files. Drivers have been
1545 added for some new ref-clocks and have been removed for some older
1546 ref-clocks. This release also includes other improvements, documentation
1549 K&R C is no longer supported as of NTP-4.2.4. We are now aiming for ANSI
1553 NTP 4.2.0 (Harlan Stenn <stenn@ntp.org>, 2003/10/15)
1555 Focus: enhancements and bug fixes.
projects / FreeBSD / releng / 9.3.git / blob