4 Focus: Security, Bug fies, enhancements.
8 In addition to bug fixes and enhancements, this release fixes the
9 following 13 low- and medium-severity vulnerabilities:
11 * Incomplete vallen (value length) checks in ntp_crypto.c, leading
12 to potential crashes or potential code injection/information leakage.
14 References: Sec 2899, Sec 2671, CVE-2015-7691, CVE-2015-7692, CVE-2015-7702
15 Affects: All ntp-4 releases up to, but not including 4.2.8p4,
16 and 4.3.0 up to, but not including 4.3.77
17 CVSS: (AV:N/AC:H/Au:M/C:N/I:N/A:C) Base Score: 4.6
18 Summary: The fix for CVE-2014-9750 was incomplete in that there were
19 certain code paths where a packet with particular autokey operations
20 that contained malicious data was not always being completely
21 validated. Receipt of these packets can cause ntpd to crash.
24 Upgrade to 4.2.8p4, or later, from the NTP Project Download
25 Page or the NTP Public Services Project Download Page
26 Monitor your ntpd instances.
27 Credit: This weakness was discovered by Tenable Network Security.
29 * Clients that receive a KoD should validate the origin timestamp field.
31 References: Sec 2901 / CVE-2015-7704, CVE-2015-7705
32 Affects: All ntp-4 releases up to, but not including 4.2.8p4,
33 and 4.3.0 up to, but not including 4.3.77
34 CVSS: (AV:N/AC:M/Au:N/C:N/I:N/A:P) Base Score: 4.3-5.0 at worst
35 Summary: An ntpd client that honors Kiss-of-Death responses will honor
36 KoD messages that have been forged by an attacker, causing it to
37 delay or stop querying its servers for time updates. Also, an
38 attacker can forge packets that claim to be from the target and
39 send them to servers often enough that a server that implements
40 KoD rate limiting will send the target machine a KoD response to
41 attempt to reduce the rate of incoming packets, or it may also
42 trigger a firewall block at the server for packets from the target
43 machine. For either of these attacks to succeed, the attacker must
44 know what servers the target is communicating with. An attacker
45 can be anywhere on the Internet and can frequently learn the
46 identity of the target's time source by sending the target a
50 Upgrade to 4.2.8p4, or later, from the NTP Project Download Page
51 or the NTP Public Services Project Download Page
52 If you can't upgrade, restrict who can query ntpd to learn who
53 its servers are, and what IPs are allowed to ask your system
54 for the time. This mitigation is heavy-handed.
55 Monitor your ntpd instances.
57 4.2.8p4 protects against the first attack. For the second attack,
58 all we can do is warn when it is happening, which we do in 4.2.8p4.
59 Credit: This weakness was discovered by Aanchal Malhotra,
60 Issac E. Cohen, and Sharon Goldberg of Boston University.
62 * configuration directives to change "pidfile" and "driftfile" should
63 only be allowed locally.
65 References: Sec 2902 / CVE-2015-5196
66 Affects: All ntp-4 releases up to, but not including 4.2.8p4,
67 and 4.3.0 up to, but not including 4.3.77
68 CVSS: (AV:N/AC:H/Au:M/C:N/I:C/A:C) Base Score: 6.2 worst case
69 Summary: If ntpd is configured to allow for remote configuration,
70 and if the (possibly spoofed) source IP address is allowed to
71 send remote configuration requests, and if the attacker knows
72 the remote configuration password, it's possible for an attacker
73 to use the "pidfile" or "driftfile" directives to potentially
74 overwrite other files.
77 Upgrade to 4.2.8p4, or later, from the NTP Project Download
78 Page or the NTP Public Services Project Download Page
79 If you cannot upgrade, don't enable remote configuration.
80 If you must enable remote configuration and cannot upgrade,
81 remote configuration of NTF's ntpd requires:
82 - an explicitly configured trustedkey, and you should also
83 configure a controlkey.
84 - access from a permitted IP. You choose the IPs.
85 - authentication. Don't disable it. Practice secure key safety.
86 Monitor your ntpd instances.
87 Credit: This weakness was discovered by Miroslav Lichvar of Red Hat.
89 * Slow memory leak in CRYPTO_ASSOC
91 References: Sec 2909 / CVE-2015-7701
92 Affects: All ntp-4 releases that use autokey up to, but not
93 including 4.2.8p4, and 4.3.0 up to, but not including 4.3.77
94 CVSS: (AV:N/AC:H/Au:M/C:N/I:N/A:C) Base Score: 0.0 best/usual case,
96 Summary: If ntpd is configured to use autokey, then an attacker can
97 send packets to ntpd that will, after several days of ongoing
98 attack, cause it to run out of memory.
101 Upgrade to 4.2.8p4, or later, from the NTP Project Download
102 Page or the NTP Public Services Project Download Page
103 Monitor your ntpd instances.
104 Credit: This weakness was discovered by Tenable Network Security.
106 * mode 7 loop counter underrun
108 References: Sec 2913 / CVE-2015-7848 / TALOS-CAN-0052
109 Affects: All ntp-4 releases up to, but not including 4.2.8p4,
110 and 4.3.0 up to, but not including 4.3.77
111 CVSS: (AV:N/AC:H/Au:M/C:N/I:N/A:C) Base Score: 4.6
112 Summary: If ntpd is configured to enable mode 7 packets, and if the
113 use of mode 7 packets is not properly protected thru the use of
114 the available mode 7 authentication and restriction mechanisms,
115 and if the (possibly spoofed) source IP address is allowed to
116 send mode 7 queries, then an attacker can send a crafted packet
117 to ntpd that will cause it to crash.
120 Upgrade to 4.2.8p4, or later, from the NTP Project Download
121 Page or the NTP Public Services Project Download Page.
122 If you are unable to upgrade:
123 In ntp-4.2.8, mode 7 is disabled by default. Don't enable it.
124 If you must enable mode 7:
125 configure the use of a requestkey to control who can issue
127 configure restrict noquery to further limit mode 7 requests
129 Monitor your ntpd instances.
130 Credit: This weakness was discovered by Aleksandar Nikolic of Cisco Talos.
132 * memory corruption in password store
134 References: Sec 2916 / CVE-2015-7849 / TALOS-CAN-0054
135 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
136 CVSS: (AV:N/AC:H/Au:M/C:N/I:C/A:C) Base Score: 6.8, worst case
137 Summary: If ntpd is configured to allow remote configuration, and if
138 the (possibly spoofed) source IP address is allowed to send
139 remote configuration requests, and if the attacker knows the
140 remote configuration password or if ntpd was configured to
141 disable authentication, then an attacker can send a set of
142 packets to ntpd that may cause a crash or theoretically
143 perform a code injection attack.
146 Upgrade to 4.2.8p4, or later, from the NTP Project Download
147 Page or the NTP Public Services Project Download Page.
148 If you are unable to upgrade, remote configuration of NTF's
150 an explicitly configured "trusted" key. Only configure
152 access from a permitted IP address. You choose the IPs.
153 authentication. Don't disable it. Practice secure key safety.
154 Monitor your ntpd instances.
155 Credit: This weakness was discovered by Yves Younan of Cisco Talos.
157 * Infinite loop if extended logging enabled and the logfile and
158 keyfile are the same.
160 References: Sec 2917 / CVE-2015-7850 / TALOS-CAN-0055
161 Affects: All ntp-4 releases up to, but not including 4.2.8p4,
162 and 4.3.0 up to, but not including 4.3.77
163 CVSS: (AV:N/AC:H/Au:M/C:N/I:N/A:C) Base Score: 4.6, worst case
164 Summary: If ntpd is configured to allow remote configuration, and if
165 the (possibly spoofed) source IP address is allowed to send
166 remote configuration requests, and if the attacker knows the
167 remote configuration password or if ntpd was configured to
168 disable authentication, then an attacker can send a set of
169 packets to ntpd that will cause it to crash and/or create a
170 potentially huge log file. Specifically, the attacker could
171 enable extended logging, point the key file at the log file,
172 and cause what amounts to an infinite loop.
175 Upgrade to 4.2.8p4, or later, from the NTP Project Download
176 Page or the NTP Public Services Project Download Page.
177 If you are unable to upgrade, remote configuration of NTF's ntpd
179 an explicitly configured "trusted" key. Only configure this
181 access from a permitted IP address. You choose the IPs.
182 authentication. Don't disable it. Practice secure key safety.
183 Monitor your ntpd instances.
184 Credit: This weakness was discovered by Yves Younan of Cisco Talos.
186 * Potential path traversal vulnerability in the config file saving of
189 References: Sec 2918 / CVE-2015-7851 / TALOS-CAN-0062
190 Affects: All ntp-4 releases running under VMS up to, but not
191 including 4.2.8p4, and 4.3.0 up to, but not including 4.3.77
192 CVSS: (AV:N/AC:H/Au:M/C:N/I:P/A:C) Base Score: 5.2, worst case
193 Summary: If ntpd is configured to allow remote configuration, and if
194 the (possibly spoofed) IP address is allowed to send remote
195 configuration requests, and if the attacker knows the remote
196 configuration password or if ntpd was configured to disable
197 authentication, then an attacker can send a set of packets to
198 ntpd that may cause ntpd to overwrite files.
201 Upgrade to 4.2.8p4, or later, from the NTP Project Download
202 Page or the NTP Public Services Project Download Page.
203 If you are unable to upgrade, remote configuration of NTF's ntpd
205 an explicitly configured "trusted" key. Only configure
207 access from permitted IP addresses. You choose the IPs.
208 authentication. Don't disable it. Practice key security safety.
209 Monitor your ntpd instances.
210 Credit: This weakness was discovered by Yves Younan of Cisco Talos.
212 * ntpq atoascii() potential memory corruption
214 References: Sec 2919 / CVE-2015-7852 / TALOS-CAN-0063
215 Affects: All ntp-4 releases running up to, but not including 4.2.8p4,
216 and 4.3.0 up to, but not including 4.3.77
217 CVSS: (AV:N/AC:H/Au:N/C:N/I:P/A:P) Base Score: 4.0, worst case
218 Summary: If an attacker can figure out the precise moment that ntpq
219 is listening for data and the port number it is listening on or
220 if the attacker can provide a malicious instance ntpd that
221 victims will connect to then an attacker can send a set of
222 crafted mode 6 response packets that, if received by ntpq,
223 can cause ntpq to crash.
226 Upgrade to 4.2.8p4, or later, from the NTP Project Download
227 Page or the NTP Public Services Project Download Page.
228 If you are unable to upgrade and you run ntpq against a server
229 and ntpq crashes, try again using raw mode. Build or get a
230 patched ntpq and see if that fixes the problem. Report new
231 bugs in ntpq or abusive servers appropriately.
232 If you use ntpq in scripts, make sure ntpq does what you expect
234 Credit: This weakness was discovered by Yves Younan and
235 Aleksander Nikolich of Cisco Talos.
237 * Invalid length data provided by a custom refclock driver could cause
240 References: Sec 2920 / CVE-2015-7853 / TALOS-CAN-0064
241 Affects: Potentially all ntp-4 releases running up to, but not
242 including 4.2.8p4, and 4.3.0 up to, but not including 4.3.77
243 that have custom refclocks
244 CVSS: (AV:L/AC:H/Au:M/C:C/I:C/A:C) Base Score: 0.0 usual case,
245 5.9 unusual worst case
246 Summary: A negative value for the datalen parameter will overflow a
247 data buffer. NTF's ntpd driver implementations always set this
248 value to 0 and are therefore not vulnerable to this weakness.
249 If you are running a custom refclock driver in ntpd and that
250 driver supplies a negative value for datalen (no custom driver
251 of even minimal competence would do this) then ntpd would
252 overflow a data buffer. It is even hypothetically possible
253 in this case that instead of simply crashing ntpd the attacker
254 could effect a code injection attack.
256 Upgrade to 4.2.8p4, or later, from the NTP Project Download
257 Page or the NTP Public Services Project Download Page.
258 If you are unable to upgrade:
259 If you are running custom refclock drivers, make sure
260 the signed datalen value is either zero or positive.
261 Monitor your ntpd instances.
262 Credit: This weakness was discovered by Yves Younan of Cisco Talos.
264 * Password Length Memory Corruption Vulnerability
266 References: Sec 2921 / CVE-2015-7854 / TALOS-CAN-0065
267 Affects: All ntp-4 releases up to, but not including 4.2.8p4, and
268 4.3.0 up to, but not including 4.3.77
269 CVSS: (AV:N/AC:H/Au:M/C:C/I:C/A:C) Base Score: 0.0 best case,
270 1.7 usual case, 6.8, worst case
271 Summary: If ntpd is configured to allow remote configuration, and if
272 the (possibly spoofed) source IP address is allowed to send
273 remote configuration requests, and if the attacker knows the
274 remote configuration password or if ntpd was (foolishly)
275 configured to disable authentication, then an attacker can
276 send a set of packets to ntpd that may cause it to crash,
277 with the hypothetical possibility of a small code injection.
280 Upgrade to 4.2.8p4, or later, from the NTP Project Download
281 Page or the NTP Public Services Project Download Page.
282 If you are unable to upgrade, remote configuration of NTF's
284 an explicitly configured "trusted" key. Only configure
286 access from a permitted IP address. You choose the IPs.
287 authentication. Don't disable it. Practice secure key safety.
288 Monitor your ntpd instances.
289 Credit: This weakness was discovered by Yves Younan and
290 Aleksander Nikolich of Cisco Talos.
292 * decodenetnum() will ASSERT botch instead of returning FAIL on some
295 References: Sec 2922 / CVE-2015-7855
296 Affects: All ntp-4 releases up to, but not including 4.2.8p4, and
297 4.3.0 up to, but not including 4.3.77
298 CVSS: (AV:N/AC:H/Au:M/C:N/I:N/A:C) Base Score: 4.6, worst case
299 Summary: If ntpd is fed a crafted mode 6 or mode 7 packet containing
300 an unusually long data value where a network address is expected,
301 the decodenetnum() function will abort with an assertion failure
302 instead of simply returning a failure condition.
305 Upgrade to 4.2.8p4, or later, from the NTP Project Download
306 Page or the NTP Public Services Project Download Page.
307 If you are unable to upgrade:
308 mode 7 is disabled by default. Don't enable it.
309 Use restrict noquery to limit who can send mode 6
311 Configure and use the controlkey and requestkey
312 authentication directives to limit who can
313 send mode 6 and mode 7 requests.
314 Monitor your ntpd instances.
315 Credit: This weakness was discovered by John D "Doug" Birdwell of IDA.org.
317 * NAK to the Future: Symmetric association authentication bypass via
320 References: Sec 2941 / CVE-2015-7871
321 Affects: All ntp-4 releases between 4.2.5p186 up to but not including
322 4.2.8p4, and 4.3.0 up to but not including 4.3.77
323 CVSS: (AV:N/AC:L/Au:N/C:N/I:P/A:P) Base Score: 6.4
324 Summary: Crypto-NAK packets can be used to cause ntpd to accept time
325 from unauthenticated ephemeral symmetric peers by bypassing the
326 authentication required to mobilize peer associations. This
327 vulnerability appears to have been introduced in ntp-4.2.5p186
328 when the code handling mobilization of new passive symmetric
329 associations (lines 1103-1165) was refactored.
332 Upgrade to 4.2.8p4, or later, from the NTP Project Download
333 Page or the NTP Public Services Project Download Page.
334 If you are unable to upgrade:
335 Apply the patch to the bottom of the "authentic" check
336 block around line 1136 of ntp_proto.c.
337 Monitor your ntpd instances.
338 Credit: This weakness was discovered by Stephen Gray <stepgray@cisco.com>.
340 Backward-Incompatible changes:
341 * [Bug 2817] Default on Linux is now "rlimit memlock -1".
342 While the general default of 32M is still the case, under Linux
343 the default value has been changed to -1 (do not lock ntpd into
344 memory). A value of 0 means "lock ntpd into memory with whatever
345 memory it needs." If your ntp.conf file has an explicit "rlimit memlock"
346 value in it, that value will continue to be used.
348 * [Bug 2886] Misspelling: "outlyer" should be "outlier".
349 If you've written a script that looks for this case in, say, the
350 output of ntpq, you probably want to change your regex matches
351 from 'outlyer' to 'outl[iy]er'.
353 New features in this release:
354 * 'rlimit memlock' now has finer-grained control. A value of -1 means
355 "don't lock ntpd into memore". This is the default for Linux boxes.
356 A value of 0 means "lock ntpd into memory" with no limits. Otherwise
357 the value is the number of megabytes of memory to lock. The default
360 * The old Google Test framework has been replaced with a new framework,
361 based on http://www.throwtheswitch.org/unity/ .
363 Bug Fixes and Improvements:
364 * [Bug 2332] (reopened) Exercise thread cancellation once before dropping
365 privileges and limiting resources in NTPD removes the need to link
366 forcefully against 'libgcc_s' which does not always work. J.Perlinger
367 * [Bug 2595] ntpdate man page quirks. Hal Murray, Harlan Stenn.
368 * [Bug 2625] Deprecate flag1 in local refclock. Hal Murray, Harlan Stenn.
369 * [Bug 2817] Stop locking ntpd into memory by default under Linux. H.Stenn.
370 * [Bug 2821] minor build issues: fixed refclock_gpsdjson.c. perlinger@ntp.org
371 * [Bug 2823] ntpsweep with recursive peers option doesn't work. H.Stenn.
372 * [Bug 2849] Systems with more than one default route may never
373 synchronize. Brian Utterback. Note that this patch might need to
374 be reverted once Bug 2043 has been fixed.
375 * [Bug 2864] 4.2.8p3 fails to compile on Windows. Juergen Perlinger
376 * [Bug 2866] segmentation fault at initgroups(). Harlan Stenn.
377 * [Bug 2867] ntpd with autokey active crashed by 'ntpq -crv'. J.Perlinger
378 * [Bug 2873] libevent should not include .deps/ in the tarball. H.Stenn
379 * [Bug 2874] Don't distribute generated sntp/tests/fileHandlingTest.h. H.Stenn
380 * [Bug 2875] sntp/Makefile.am: Get rid of DIST_SUBDIRS. libevent must
381 be configured for the distribution targets. Harlan Stenn.
382 * [Bug 2883] ntpd crashes on exit with empty driftfile. Miroslav Lichvar.
383 * [Bug 2886] Mis-spelling: "outlyer" should be "outlier". dave@horsfall.org
384 * [Bug 2888] streamline calendar functions. perlinger@ntp.org
385 * [Bug 2889] ntp-dev-4.3.67 does not build on Windows. perlinger@ntp.org
386 * [Bug 2890] Ignore ENOBUFS on routing netlink socket. Konstantin Khlebnikov.
387 * [Bug 2906] make check needs better support for pthreads. Harlan Stenn.
388 * [Bug 2907] dist* build targets require our libevent/ to be enabled. HStenn.
389 * [Bug 2912] no munlockall() under Windows. David Taylor, Harlan Stenn.
390 * libntp/emalloc.c: Remove explicit include of stdint.h. Harlan Stenn.
391 * Put Unity CPPFLAGS items in unity_config.h. Harlan Stenn.
392 * tests/ntpd/g_leapsec.cpp typo fix. Harlan Stenn.
393 * Phase 1 deprecation of google test in sntp/tests/. Harlan Stenn.
394 * On some versions of HP-UX, inttypes.h does not include stdint.h. H.Stenn.
395 * top_srcdir can change based on ntp v. sntp. Harlan Stenn.
396 * sntp/tests/ function parameter list cleanup. Damir Tomić.
397 * tests/libntp/ function parameter list cleanup. Damir Tomić.
398 * tests/ntpd/ function parameter list cleanup. Damir Tomić.
399 * sntp/unity/unity_config.h: handle stdint.h. Harlan Stenn.
400 * sntp/unity/unity_internals.h: handle *INTPTR_MAX on old Solaris. H.Stenn.
401 * tests/libntp/timevalops.c and timespecops.c fixed error printing. D.Tomić.
402 * tests/libntp/ improvements in code and fixed error printing. Damir Tomić.
403 * tests/libntp: a_md5encrypt.c, authkeys.c, buftvtots.c, calendar.c, caljulian.c,
404 caltontp.c, clocktime.c, humandate.c, hextolfp.c, decodenetnum.c - fixed
405 formatting; first declaration, then code (C90); deleted unnecessary comments;
406 changed from sprintf to snprintf; fixed order of includes. Tomasz Flendrich
407 * tests/libntp/lfpfunc.c remove unnecessary include, remove old comments,
408 fix formatting, cleanup. Tomasz Flendrich
409 * tests/libntp/lfptostr.c remove unnecessary include, add consts, fix formatting.
411 * tests/libntp/statestr.c remove empty functions, remove unnecessary include,
412 fix formatting. Tomasz Flendrich
413 * tests/libntp/modetoa.c fixed formatting. Tomasz Flendrich
414 * tests/libntp/msyslog.c fixed formatting. Tomasz Flendrich
415 * tests/libntp/numtoa.c deleted unnecessary empty functions, fixed formatting.
417 * tests/libntp/numtohost.c added const, fixed formatting. Tomasz Flendrich
418 * tests/libntp/refnumtoa.c fixed formatting. Tomasz Flendrich
419 * tests/libntp/ssl_init.c fixed formatting. Tomasz Flendrich
420 * tests/libntp/tvtots.c fixed a bug, fixed formatting. Tomasz Flendrich
421 * tests/libntp/uglydate.c removed an unnecessary include. Tomasz Flendrich
422 * tests/libntp/vi64ops.c removed an unnecessary comment, fixed formatting.
423 * tests/libntp/ymd3yd.c removed an empty function and an unnecessary include,
424 fixed formatting. Tomasz Flendrich
425 * tests/libntp/timespecops.c fixed formatting, fixed the order of includes,
426 removed unnecessary comments, cleanup. Tomasz Flendrich
427 * tests/libntp/timevalops.c fixed the order of includes, deleted unnecessary
428 comments, cleanup. Tomasz Flendrich
429 * tests/libntp/sockaddrtest.h making it agree to NTP's conventions of formatting.
431 * tests/libntp/lfptest.h cleanup. Tomasz Flendrich
432 * tests/libntp/test-libntp.c fix formatting. Tomasz Flendrich
433 * sntp/tests/crypto.c is now using proper Unity's assertions, fixed formatting.
435 * sntp/tests/kodDatabase.c added consts, deleted empty function,
436 fixed formatting. Tomasz Flendrich
437 * sntp/tests/kodFile.c cleanup, fixed formatting. Tomasz Flendrich
438 * sntp/tests/packetHandling.c is now using proper Unity's assertions,
439 fixed formatting, deleted unused variable. Tomasz Flendrich
440 * sntp/tests/keyFile.c is now using proper Unity's assertions, fixed formatting.
442 * sntp/tests/packetProcessing.c changed from sprintf to snprintf,
443 fixed formatting. Tomasz Flendrich
444 * sntp/tests/utilities.c is now using proper Unity's assertions, changed
445 the order of includes, fixed formatting, removed unnecessary comments.
447 * sntp/tests/sntptest.h fixed formatting. Tomasz Flendrich
448 * sntp/tests/fileHandlingTest.h.in fixed a possible buffer overflow problem,
449 made one function do its job, deleted unnecessary prints, fixed formatting.
451 * sntp/unity/Makefile.am added a missing header. Tomasz Flendrich
452 * sntp/unity/unity_config.h: Distribute it. Harlan Stenn.
453 * sntp/libevent/evconfig-private.h: remove generated filefrom SCM. H.Stenn.
454 * sntp/unity/Makefile.am: fix some broken paths. Harlan Stenn.
455 * sntp/unity/unity.c: Clean up a printf(). Harlan Stenn.
456 * Phase 1 deprecation of google test in tests/libntp/. Harlan Stenn.
457 * Don't build sntp/libevent/sample/. Harlan Stenn.
458 * tests/libntp/test_caltontp needs -lpthread. Harlan Stenn.
459 * br-flock: --enable-local-libevent. Harlan Stenn.
460 * Wrote tests for ntpd/ntp_prio_q.c. Tomasz Flendrich
461 * scripts/lib/NTP/Util.pm: stratum output is version-dependent. Harlan Stenn.
462 * Get rid of the NTP_ prefix on our assertion macros. Harlan Stenn.
463 * Code cleanup. Harlan Stenn.
464 * libntp/icom.c: Typo fix. Harlan Stenn.
465 * util/ntptime.c: initialization nit. Harlan Stenn.
466 * ntpd/ntp_peer.c:newpeer(): added a DEBUG_REQUIRE(srcadr). Harlan Stenn.
467 * Add std_unity_tests to various Makefile.am files. Harlan Stenn.
468 * ntpd/ntp_restrict.c: added a few assertions, created tests for this file.
470 * Changed progname to be const in many files - now it's consistent. Tomasz
472 * Typo fix for GCC warning suppression. Harlan Stenn.
473 * Added tests/ntpd/ntp_scanner.c test. Damir Tomić.
474 * Added declarations to all Unity tests, and did minor fixes to them.
475 Reduced the number of warnings by half. Damir Tomić.
476 * Updated generate_test_runner.rb and updated the sntp/unity/auto directory
477 with the latest Unity updates from Mark. Damir Tomić.
478 * Retire google test - phase I. Harlan Stenn.
479 * Unity test cleanup: move declaration of 'initializing'. Harlan Stenn.
480 * Update the NEWS file. Harlan Stenn.
481 * Autoconf cleanup. Harlan Stenn.
482 * Unit test dist cleanup. Harlan Stenn.
483 * Cleanup various test Makefile.am files. Harlan Stenn.
484 * Pthread autoconf macro cleanup. Harlan Stenn.
485 * Fix progname definition in unity runner scripts. Harlan Stenn.
486 * Clean trailing whitespace in tests/ntpd/Makefile.am. Harlan Stenn.
487 * Update the patch for bug 2817. Harlan Stenn.
488 * More updates for bug 2817. Harlan Stenn.
489 * Fix bugs in tests/ntpd/ntp_prio_q.c. Harlan Stenn.
490 * gcc on older HPUX may need +allowdups. Harlan Stenn.
491 * Adding missing MCAST protection. Harlan Stenn.
492 * Disable certain test programs on certain platforms. Harlan Stenn.
493 * Implement --enable-problem-tests (on by default). Harlan Stenn.
494 * build system tweaks. Harlan Stenn.
497 NTP 4.2.8p3 (Harlan Stenn <stenn@ntp.org>, 2015/06/29)
499 Focus: 1 Security fix. Bug fixes and enhancements. Leap-second improvements.
505 * [Sec 2853] Crafted remote config packet can crash some versions of
506 ntpd. Aleksis Kauppinen, Juergen Perlinger, Harlan Stenn.
508 Under specific circumstances an attacker can send a crafted packet to
509 cause a vulnerable ntpd instance to crash. This requires each of the
510 following to be true:
512 1) ntpd set up to allow remote configuration (not allowed by default), and
513 2) knowledge of the configuration password, and
514 3) access to a computer entrusted to perform remote configuration.
516 This vulnerability is considered low-risk.
518 New features in this release:
520 Optional (disabled by default) support to have ntpd provide smeared
521 leap second time. A specially built and configured ntpd will only
522 offer smeared time in response to client packets. These response
523 packets will also contain a "refid" of 254.a.b.c, where the 24 bits
524 of a, b, and c encode the amount of smear in a 2:22 integer:fraction
525 format. See README.leapsmear and http://bugs.ntp.org/2855 for more
528 *IF YOU CHOOSE TO CONFIGURE NTPD TO PROVIDE LEAP SMEAR TIME*
529 *BE SURE YOU DO NOT OFFER THAT TIME ON PUBLIC TIMESERVERS.*
531 We've imported the Unity test framework, and have begun converting
532 the existing google-test items to this new framework. If you want
533 to write new tests or change old ones, you'll need to have ruby
534 installed. You don't need ruby to run the test suite.
536 Bug Fixes and Improvements:
538 * CID 739725: Fix a rare resource leak in libevent/listener.c.
539 * CID 1295478: Quiet a pedantic potential error from the fix for Bug 2776.
540 * CID 1296235: Fix refclock_jjy.c and correcting type of the driver40-ja.html
541 * CID 1269537: Clean up a line of dead code in getShmTime().
542 * [Bug 1060] Buffer overruns in libparse/clk_rawdcf.c. Helge Oldach.
543 * [Bug 2590] autogen-5.18.5.
544 * [Bug 2612] restrict: Warn when 'monitor' can't be disabled because
546 * [Bug 2650] fix includefile processing.
547 * [Bug 2745] ntpd -x steps clock on leap second
548 Fixed an initial-value problem that caused misbehaviour in absence of
549 any leapsecond information.
550 Do leap second stepping only of the step adjustment is beyond the
551 proper jump distance limit and step correction is allowed at all.
552 * [Bug 2750] build for Win64
553 Building for 32bit of loopback ppsapi needs def file
554 * [Bug 2776] Improve ntpq's 'help keytype'.
555 * [Bug 2778] Implement "apeers" ntpq command to include associd.
556 * [Bug 2782] Refactor refclock_shm.c, add memory barrier protection.
557 * [Bug 2792] If the IFF_RUNNING interface flag is supported then an
558 interface is ignored as long as this flag is not set since the
559 interface is not usable (e.g., no link).
560 * [Bug 2794] Clean up kernel clock status reports.
561 * [Bug 2800] refclock_true.c true_debug() can't open debug log because
562 of incompatible open/fdopen parameters.
563 * [Bug 2804] install-local-data assumes GNU 'find' semantics.
564 * [Bug 2805] ntpd fails to join multicast group.
565 * [Bug 2806] refclock_jjy.c supports the Telephone JJY.
566 * [Bug 2808] GPSD_JSON driver enhancements, step 1.
567 Fix crash during cleanup if GPS device not present and char device.
568 Increase internal token buffer to parse all JSON data, even SKY.
569 Defer logging of errors during driver init until the first unit is
570 started, so the syslog is not cluttered when the driver is not used.
571 Various improvements, see http://bugs.ntp.org/2808 for details.
572 Changed libjsmn to a more recent version.
573 * [Bug 2810] refclock_shm.c memory barrier code needs tweaks for QNX.
574 * [Bug 2813] HP-UX needs -D__STDC_VERSION__=199901L and limits.h.
575 * [Bug 2815] net-snmp before v5.4 has circular library dependencies.
576 * [Bug 2821] Add a missing NTP_PRINTF and a missing const.
577 * [Bug 2822] New leap column in sntp broke NTP::Util.pm.
578 * [Bug 2824] Convert update-leap to perl. (also see 2769)
579 * [Bug 2825] Quiet file installation in html/ .
580 * [Bug 2830] ntpd doesn't always transfer the correct TAI offset via autokey
581 NTPD transfers the current TAI (instead of an announcement) now.
582 This might still needed improvement.
583 Update autokey data ASAP when 'sys_tai' changes.
584 Fix unit test that was broken by changes for autokey update.
585 Avoid potential signature length issue and use DPRINTF where possible
587 * [Bug 2832] refclock_jjy.c supports the TDC-300.
588 * [Bug 2834] Correct a broken html tag in html/refclock.html
589 * [Bug 2836] DFC77 patches from Frank Kardel to make decoding more
590 robust, and require 2 consecutive timestamps to be consistent.
591 * [Bug 2837] Allow a configurable DSCP value.
592 * [Bug 2837] add test for DSCP to ntpd/complete.conf.in
593 * [Bug 2842] Glitch in ntp.conf.def documentation stanza.
594 * [Bug 2842] Bug in mdoc2man.
595 * [Bug 2843] make check fails on 4.3.36
596 Fixed compiler warnings about numeric range overflow
597 (The original topic was fixed in a byplay to bug#2830)
598 * [Bug 2845] Harden memory allocation in ntpd.
599 * [Bug 2852] 'make check' can't find unity.h. Hal Murray.
600 * [Bug 2854] Missing brace in libntp/strdup.c. Masanari Iida.
601 * [Bug 2855] Parser fix for conditional leap smear code. Harlan Stenn.
602 * [Bug 2855] Report leap smear in the REFID. Harlan Stenn.
603 * [Bug 2855] Implement conditional leap smear code. Martin Burnicki.
604 * [Bug 2856] ntpd should wait() on terminated child processes. Paul Green.
605 * [Bug 2857] Stratus VOS does not support SIGIO. Paul Green.
606 * [Bug 2859] Improve raw DCF77 robustness deconding. Frank Kardel.
607 * [Bug 2860] ntpq ifstats sanity check is too stringent. Frank Kardel.
608 * html/drivers/driver22.html: typo fix. Harlan Stenn.
609 * refidsmear test cleanup. Tomasz Flendrich.
610 * refidsmear function support and tests. Harlan Stenn.
611 * sntp/tests/Makefile.am: remove g_nameresolution.cpp as it tested
612 something that was only in the 4.2.6 sntp. Harlan Stenn.
613 * Modified tests/bug-2803/Makefile.am so it builds Unity framework tests.
615 * Modified tests/libtnp/Makefile.am so it builds Unity framework tests.
617 * Modified sntp/tests/Makefile.am so it builds Unity framework tests.
619 * tests/sandbox/smeartest.c: Harlan Stenn, Damir Tomic, Juergen Perlinger.
620 * Converted from gtest to Unity: tests/bug-2803/. Damir Tomić
621 * Converted from gtest to Unity: tests/libntp/ a_md5encrypt, atoint.c,
622 atouint.c, authkeys.c, buftvtots.c, calendar.c, caljulian.c,
623 calyearstart.c, clocktime.c, hextoint.c, lfpfunc.c, modetoa.c,
624 numtoa.c, numtohost.c, refnumtoa.c, ssl_init.c, statestr.c,
625 timespecops.c, timevalops.c, uglydate.c, vi64ops.c, ymd2yd.c.
627 * Converted from gtest to Unity: sntp/tests/ kodDatabase.c, kodFile.c,
628 networking.c, keyFile.c, utilities.cpp, sntptest.h,
629 fileHandlingTest.h. Damir Tomić
630 * Initial support for experimental leap smear code. Harlan Stenn.
631 * Fixes to sntp/tests/fileHandlingTest.h.in. Harlan Stenn.
632 * Report select() debug messages at debug level 3 now.
633 * sntp/scripts/genLocInfo: treat raspbian as debian.
634 * Unity test framework fixes.
635 ** Requires ruby for changes to tests.
636 * Initial support for PACKAGE_VERSION tests.
637 * sntp/libpkgver belongs in EXTRA_DIST, not DIST_SUBDIRS.
638 * tests/bug-2803/Makefile.am must distribute bug-2803.h.
639 * Add an assert to the ntpq ifstats code.
640 * Clean up the RLIMIT_STACK code.
641 * Improve the ntpq documentation around the controlkey keyid.
643 * Windows port build cleanup.
646 NTP 4.2.8p2 (Harlan Stenn <stenn@ntp.org>, 2015/04/07)
648 Focus: Security and Bug fixes, enhancements.
652 In addition to bug fixes and enhancements, this release fixes the
653 following medium-severity vulnerabilities involving private key
656 * [Sec 2779] ntpd accepts unauthenticated packets with symmetric key crypto.
658 References: Sec 2779 / CVE-2015-1798 / VU#374268
659 Affects: All NTP4 releases starting with ntp-4.2.5p99 up to but not
660 including ntp-4.2.8p2 where the installation uses symmetric keys
661 to authenticate remote associations.
662 CVSS: (AV:A/AC:M/Au:N/C:P/I:P/A:P) Base Score: 5.4
663 Date Resolved: Stable (4.2.8p2) 07 Apr 2015
664 Summary: When ntpd is configured to use a symmetric key to authenticate
665 a remote NTP server/peer, it checks if the NTP message
666 authentication code (MAC) in received packets is valid, but not if
667 there actually is any MAC included. Packets without a MAC are
668 accepted as if they had a valid MAC. This allows a MITM attacker to
669 send false packets that are accepted by the client/peer without
670 having to know the symmetric key. The attacker needs to know the
671 transmit timestamp of the client to match it in the forged reply
672 and the false reply needs to reach the client before the genuine
673 reply from the server. The attacker doesn't necessarily need to be
674 relaying the packets between the client and the server.
676 Authentication using autokey doesn't have this problem as there is
677 a check that requires the key ID to be larger than NTP_MAXKEY,
678 which fails for packets without a MAC.
680 Upgrade to 4.2.8p2, or later, from the NTP Project Download Page
681 or the NTP Public Services Project Download Page
682 Configure ntpd with enough time sources and monitor it properly.
683 Credit: This issue was discovered by Miroslav Lichvar, of Red Hat.
685 * [Sec 2781] Authentication doesn't protect symmetric associations against
688 References: Sec 2781 / CVE-2015-1799 / VU#374268
689 Affects: All NTP releases starting with at least xntp3.3wy up to but
690 not including ntp-4.2.8p2 where the installation uses symmetric
692 CVSS: (AV:A/AC:M/Au:N/C:P/I:P/A:P) Base Score: 5.4
693 Note: the CVSS base Score for this issue could be 4.3 or lower, and
694 it could be higher than 5.4.
695 Date Resolved: Stable (4.2.8p2) 07 Apr 2015
696 Summary: An attacker knowing that NTP hosts A and B are peering with
697 each other (symmetric association) can send a packet to host A
698 with source address of B which will set the NTP state variables
699 on A to the values sent by the attacker. Host A will then send
700 on its next poll to B a packet with originate timestamp that
701 doesn't match the transmit timestamp of B and the packet will
702 be dropped. If the attacker does this periodically for both
703 hosts, they won't be able to synchronize to each other. This is
704 a known denial-of-service attack, described at
705 https://www.eecis.udel.edu/~mills/onwire.html .
707 According to the document the NTP authentication is supposed to
708 protect symmetric associations against this attack, but that
709 doesn't seem to be the case. The state variables are updated even
710 when authentication fails and the peers are sending packets with
711 originate timestamps that don't match the transmit timestamps on
714 This seems to be a very old problem, dating back to at least
715 xntp3.3wy. It's also in the NTPv3 (RFC 1305) and NTPv4 (RFC 5905)
716 specifications, so other NTP implementations with support for
717 symmetric associations and authentication may be vulnerable too.
718 An update to the NTP RFC to correct this error is in-process.
720 Upgrade to 4.2.8p2, or later, from the NTP Project Download Page
721 or the NTP Public Services Project Download Page
722 Note that for users of autokey, this specific style of MITM attack
723 is simply a long-known potential problem.
724 Configure ntpd with appropriate time sources and monitor ntpd.
725 Alert your staff if problems are detected.
726 Credit: This issue was discovered by Miroslav Lichvar, of Red Hat.
728 * New script: update-leap
729 The update-leap script will verify and if necessary, update the
730 leap-second definition file.
731 It requires the following commands in order to work:
733 wget logger tr sed shasum
735 Some may choose to run this from cron. It needs more portability testing.
737 Bug Fixes and Improvements:
739 * [Bug 1787] DCF77's formerly "antenna" bit is "call bit" since 2003.
740 * [Bug 1960] setsockopt IPV6_MULTICAST_IF: Invalid argument.
741 * [Bug 2346] "graceful termination" signals do not do peer cleanup.
742 * [Bug 2728] See if C99-style structure initialization works.
743 * [Bug 2747] Upgrade libevent to 2.1.5-beta.
744 * [Bug 2749] ntp/lib/NTP/Util.pm needs update for ntpq -w, IPv6, .POOL. .
745 * [Bug 2751] jitter.h has stale copies of l_fp macros.
746 * [Bug 2756] ntpd hangs in startup with gcc 3.3.5 on ARM.
747 * [Bug 2757] Quiet compiler warnings.
748 * [Bug 2759] Expose nonvolatile/clk_wander_threshold to ntpq.
749 * [Bug 2763] Allow different thresholds for forward and backward steps.
750 * [Bug 2766] ntp-keygen output files should not be world-readable.
751 * [Bug 2767] ntp-keygen -M should symlink to ntp.keys.
752 * [Bug 2771] nonvolatile value is documented in wrong units.
753 * [Bug 2773] Early leap announcement from Palisade/Thunderbolt
754 * [Bug 2774] Unreasonably verbose printout - leap pending/warning
755 * [Bug 2775] ntp-keygen.c fails to compile under Windows.
756 * [Bug 2777] Fixed loops and decoding of Meinberg GPS satellite info.
757 Removed non-ASCII characters from some copyright comments.
758 Removed trailing whitespace.
759 Updated definitions for Meinberg clocks from current Meinberg header files.
760 Now use C99 fixed-width types and avoid non-ASCII characters in comments.
761 Account for updated definitions pulled from Meinberg header files.
762 Updated comments on Meinberg GPS receivers which are not only called GPS16x.
763 Replaced some constant numbers by defines from ntp_calendar.h
764 Modified creation of parse-specific variables for Meinberg devices
766 Reworked mk_utcinfo() to avoid printing of ambiguous leap second dates.
767 Modified mbg_tm_str() which now expexts an additional parameter controlling
768 if the time status shall be printed.
769 * [Sec 2779] ntpd accepts unauthenticated packets with symmetric key crypto.
770 * [Sec 2781] Authentication doesn't protect symmetric associations against
772 * [Bug 2783] Quiet autoconf warnings about missing AC_LANG_SOURCE.
773 * [Bug 2789] Quiet compiler warnings from libevent.
774 * [Bug 2790] If ntpd sets the Windows MM timer highest resolution
775 pause briefly before measuring system clock precision to yield
777 * Comment from Juergen Perlinger in ntp_calendar.c to make the code clearer.
778 * Use predefined function types for parse driver functions
779 used to set up function pointers.
780 Account for changed prototype of parse_inp_fnc_t functions.
781 Cast parse conversion results to appropriate types to avoid
783 Let ioctl() for Windows accept a (void *) to avoid compiler warnings
784 when called with pointers to different types.
787 NTP 4.2.8p1 (Harlan Stenn <stenn@ntp.org>, 2015/02/04)
789 Focus: Security and Bug fixes, enhancements.
793 In addition to bug fixes and enhancements, this release fixes the
794 following high-severity vulnerabilities:
796 * vallen is not validated in several places in ntp_crypto.c, leading
797 to a potential information leak or possibly a crash
799 References: Sec 2671 / CVE-2014-9297 / VU#852879
800 Affects: All NTP4 releases before 4.2.8p1 that are running autokey.
801 CVSS: (AV:N/AC:L/Au:N/C:P/I:P/A:P) Base Score: 7.5
802 Date Resolved: Stable (4.2.8p1) 04 Feb 2015
803 Summary: The vallen packet value is not validated in several code
804 paths in ntp_crypto.c which can lead to information leakage
805 or perhaps a crash of the ntpd process.
807 Upgrade to 4.2.8p1, or later, from the NTP Project Download Page
808 or the NTP Public Services Project Download Page.
809 Disable Autokey Authentication by removing, or commenting out,
810 all configuration directives beginning with the "crypto"
811 keyword in your ntp.conf file.
812 Credit: This vulnerability was discovered by Stephen Roettger of the
813 Google Security Team, with additional cases found by Sebastian
814 Krahmer of the SUSE Security Team and Harlan Stenn of Network
817 * ::1 can be spoofed on some OSes, so ACLs based on IPv6 ::1 addresses
820 References: Sec 2672 / CVE-2014-9298 / VU#852879
821 Affects: All NTP4 releases before 4.2.8p1, under at least some
822 versions of MacOS and Linux. *BSD has not been seen to be vulnerable.
823 CVSS: (AV:N/AC:L/Au:N/C:P/I:P/A:C) Base Score: 9
824 Date Resolved: Stable (4.2.8p1) 04 Feb 2014
825 Summary: While available kernels will prevent 127.0.0.1 addresses
826 from "appearing" on non-localhost IPv4 interfaces, some kernels
827 do not offer the same protection for ::1 source addresses on
828 IPv6 interfaces. Since NTP's access control is based on source
829 address and localhost addresses generally have no restrictions,
830 an attacker can send malicious control and configuration packets
831 by spoofing ::1 addresses from the outside. Note Well: This is
832 not really a bug in NTP, it's a problem with some OSes. If you
833 have one of these OSes where ::1 can be spoofed, ALL ::1 -based
834 ACL restrictions on any application can be bypassed!
836 Upgrade to 4.2.8p1, or later, from the NTP Project Download Page
837 or the NTP Public Services Project Download Page
838 Install firewall rules to block packets claiming to come from
839 ::1 from inappropriate network interfaces.
840 Credit: This vulnerability was discovered by Stephen Roettger of
841 the Google Security Team.
843 Additionally, over 30 bugfixes and improvements were made to the codebase.
844 See the ChangeLog for more information.
847 NTP 4.2.8 (Harlan Stenn <stenn@ntp.org>, 2014/12/18)
849 Focus: Security and Bug fixes, enhancements.
853 In addition to bug fixes and enhancements, this release fixes the
854 following high-severity vulnerabilities:
856 ************************** vv NOTE WELL vv *****************************
858 The vulnerabilities listed below can be significantly mitigated by
859 following the BCP of putting
861 restrict default ... noquery
863 in the ntp.conf file. With the exception of:
865 receive(): missing return on error
866 References: Sec 2670 / CVE-2014-9296 / VU#852879
868 below (which is a limited-risk vulnerability), none of the recent
869 vulnerabilities listed below can be exploited if the source IP is
870 restricted from sending a 'query'-class packet by your ntp.conf file.
872 ************************** ^^ NOTE WELL ^^ *****************************
874 * Weak default key in config_auth().
876 References: [Sec 2665] / CVE-2014-9293 / VU#852879
877 CVSS: (AV:N/AC:L/Au:M/C:P/I:P/A:C) Base Score: 7.3
878 Vulnerable Versions: all releases prior to 4.2.7p11
879 Date Resolved: 28 Jan 2010
881 Summary: If no 'auth' key is set in the configuration file, ntpd
882 would generate a random key on the fly. There were two
883 problems with this: 1) the generated key was 31 bits in size,
884 and 2) it used the (now weak) ntp_random() function, which was
885 seeded with a 32-bit value and could only provide 32 bits of
886 entropy. This was sufficient back in the late 1990s when the
887 code was written. Not today.
890 - Upgrade to 4.2.7p11 or later.
891 - Follow BCP and put 'restrict ... noquery' in your ntp.conf file.
893 Credit: This vulnerability was noticed in ntp-4.2.6 by Neel Mehta
894 of the Google Security Team.
896 * Non-cryptographic random number generator with weak seed used by
897 ntp-keygen to generate symmetric keys.
899 References: [Sec 2666] / CVE-2014-9294 / VU#852879
900 CVSS: (AV:N/AC:L/Au:M/C:P/I:P/A:C) Base Score: 7.3
901 Vulnerable Versions: All NTP4 releases before 4.2.7p230
902 Date Resolved: Dev (4.2.7p230) 01 Nov 2011
904 Summary: Prior to ntp-4.2.7p230 ntp-keygen used a weak seed to
905 prepare a random number generator that was of good quality back
906 in the late 1990s. The random numbers produced was then used to
907 generate symmetric keys. In ntp-4.2.8 we use a current-technology
908 cryptographic random number generator, either RAND_bytes from
909 OpenSSL, or arc4random().
912 - Upgrade to 4.2.7p230 or later.
913 - Follow BCP and put 'restrict ... noquery' in your ntp.conf file.
915 Credit: This vulnerability was discovered in ntp-4.2.6 by
916 Stephen Roettger of the Google Security Team.
918 * Buffer overflow in crypto_recv()
920 References: Sec 2667 / CVE-2014-9295 / VU#852879
921 CVSS: (AV:N/AC:L/Au:N/C:P/I:P/A:P) Base Score: 7.5
922 Versions: All releases before 4.2.8
923 Date Resolved: Stable (4.2.8) 18 Dec 2014
925 Summary: When Autokey Authentication is enabled (i.e. the ntp.conf
926 file contains a 'crypto pw ...' directive) a remote attacker
927 can send a carefully crafted packet that can overflow a stack
928 buffer and potentially allow malicious code to be executed
929 with the privilege level of the ntpd process.
932 - Upgrade to 4.2.8, or later, or
933 - Disable Autokey Authentication by removing, or commenting out,
934 all configuration directives beginning with the crypto keyword
935 in your ntp.conf file.
937 Credit: This vulnerability was discovered by Stephen Roettger of the
938 Google Security Team.
940 * Buffer overflow in ctl_putdata()
942 References: Sec 2668 / CVE-2014-9295 / VU#852879
943 CVSS: (AV:N/AC:L/Au:N/C:P/I:P/A:P) Base Score: 7.5
944 Versions: All NTP4 releases before 4.2.8
945 Date Resolved: Stable (4.2.8) 18 Dec 2014
947 Summary: A remote attacker can send a carefully crafted packet that
948 can overflow a stack buffer and potentially allow malicious
949 code to be executed with the privilege level of the ntpd process.
952 - Upgrade to 4.2.8, or later.
953 - Follow BCP and put 'restrict ... noquery' in your ntp.conf file.
955 Credit: This vulnerability was discovered by Stephen Roettger of the
956 Google Security Team.
958 * Buffer overflow in configure()
960 References: Sec 2669 / CVE-2014-9295 / VU#852879
961 CVSS: (AV:N/AC:L/Au:N/C:P/I:P/A:P) Base Score: 7.5
962 Versions: All NTP4 releases before 4.2.8
963 Date Resolved: Stable (4.2.8) 18 Dec 2014
965 Summary: A remote attacker can send a carefully crafted packet that
966 can overflow a stack buffer and potentially allow malicious
967 code to be executed with the privilege level of the ntpd process.
970 - Upgrade to 4.2.8, or later.
971 - Follow BCP and put 'restrict ... noquery' in your ntp.conf file.
973 Credit: This vulnerability was discovered by Stephen Roettger of the
974 Google Security Team.
976 * receive(): missing return on error
978 References: Sec 2670 / CVE-2014-9296 / VU#852879
979 CVSS: (AV:N/AC:L/Au:N/C:N/I:N/A:P) Base Score: 5.0
980 Versions: All NTP4 releases before 4.2.8
981 Date Resolved: Stable (4.2.8) 18 Dec 2014
983 Summary: Code in ntp_proto.c:receive() was missing a 'return;' in
984 the code path where an error was detected, which meant
985 processing did not stop when a specific rare error occurred.
986 We haven't found a way for this bug to affect system integrity.
987 If there is no way to affect system integrity the base CVSS
988 score for this bug is 0. If there is one avenue through which
989 system integrity can be partially affected, the base score
990 becomes a 5. If system integrity can be partially affected
991 via all three integrity metrics, the CVSS base score become 7.5.
994 - Upgrade to 4.2.8, or later,
995 - Remove or comment out all configuration directives
996 beginning with the crypto keyword in your ntp.conf file.
998 Credit: This vulnerability was discovered by Stephen Roettger of the
999 Google Security Team.
1001 See http://support.ntp.org/security for more information.
1003 New features / changes in this release:
1007 * Internal NTP Era counters
1009 The internal counters that track the "era" (range of years) we are in
1010 rolls over every 136 years'. The current "era" started at the stroke of
1011 midnight on 1 Jan 1900, and ends just before the stroke of midnight on
1013 In the past, we have used the "midpoint" of the range to decide which
1014 era we were in. Given the longevity of some products, it became clear
1015 that it would be more functional to "look back" less, and "look forward"
1016 more. We now compile a timestamp into the ntpd executable and when we
1017 get a timestamp we us the "built-on" to tell us what era we are in.
1018 This check "looks back" 10 years, and "looks forward" 126 years.
1020 * ntpdc responses disabled by default
1024 For a long time, ntpq and its mostly text-based mode 6 (control)
1025 protocol have been preferred over ntpdc and its mode 7 (private
1026 request) protocol for runtime queries and configuration. There has
1027 been a goal of deprecating ntpdc, previously held back by numerous
1028 capabilities exposed by ntpdc with no ntpq equivalent. I have been
1029 adding commands to ntpq to cover these cases, and I believe I've
1030 covered them all, though I've not compared command-by-command
1033 As I've said previously, the binary mode 7 protocol involves a lot of
1034 hand-rolled structure layout and byte-swapping code in both ntpd and
1035 ntpdc which is hard to get right. As ntpd grows and changes, the
1036 changes are difficult to expose via ntpdc while maintaining forward
1037 and backward compatibility between ntpdc and ntpd. In contrast,
1038 ntpq's text-based, label=value approach involves more code reuse and
1039 allows compatible changes without extra work in most cases.
1041 Mode 7 has always been defined as vendor/implementation-specific while
1042 mode 6 is described in RFC 1305 and intended to be open to interoperate
1043 with other implementations. There is an early draft of an updated
1044 mode 6 description that likely will join the other NTPv4 RFCs
1045 eventually. (http://tools.ietf.org/html/draft-odonoghue-ntpv4-control-01)
1047 For these reasons, ntpd 4.2.7p230 by default disables processing of
1048 ntpdc queries, reducing ntpd's attack surface and functionally
1049 deprecating ntpdc. If you are in the habit of using ntpdc for certain
1050 operations, please try the ntpq equivalent. If there's no equivalent,
1051 please open a bug report at http://bugs.ntp.org./
1053 In addition to the above, over 1100 issues have been resolved between
1054 the 4.2.6 branch and 4.2.8. The ChangeLog file in the distribution
1058 NTP 4.2.6p5 (Harlan Stenn <stenn@ntp.org>, 2011/12/24)
1064 This is a recommended upgrade.
1066 This release updates sys_rootdisp and sys_jitter calculations to match the
1067 RFC specification, fixes a potential IPv6 address matching error for the
1068 "nic" and "interface" configuration directives, suppresses the creation of
1069 extraneous ephemeral associations for certain broadcastclient and
1070 multicastclient configurations, cleans up some ntpq display issues, and
1071 includes improvements to orphan mode, minor bugs fixes and code clean-ups.
1073 New features / changes in this release:
1077 * Updated "nic" and "interface" IPv6 address handling to prevent
1078 mismatches with localhost [::1] and wildcard [::] which resulted from
1079 using the address/prefix format (e.g. fe80::/64)
1080 * Fix orphan mode stratum incorrectly counting to infinity
1081 * Orphan parent selection metric updated to includes missing ntohl()
1082 * Non-printable stratum 16 refid no longer sent to ntp
1083 * Duplicate ephemeral associations suppressed for broadcastclient and
1084 multicastclient without broadcastdelay
1085 * Exclude undetermined sys_refid from use in loopback TEST12
1086 * Exclude MODE_SERVER responses from KoD rate limiting
1087 * Include root delay in clock_update() sys_rootdisp calculations
1088 * get_systime() updated to exclude sys_residual offset (which only
1089 affected bits "below" sys_tick, the precision threshold)
1090 * sys.peer jitter weighting corrected in sys_jitter calculation
1094 * -n option extended to include the billboard "server" column
1095 * IPv6 addresses in the local column truncated to prevent overruns
1098 NTP 4.2.6p4 (Harlan Stenn <stenn@ntp.org>, 2011/09/22)
1100 Focus: Bug fixes and portability improvements
1104 This is a recommended upgrade.
1106 This release includes build infrastructure updates, code
1107 clean-ups, minor bug fixes, fixes for a number of minor
1108 ref-clock issues, and documentation revisions.
1110 Portability improvements affect AIX, HP-UX, Linux, OS X and 64-bit time_t.
1112 New features / changes in this release:
1116 * Fix checking for struct rtattr
1117 * Update config.guess and config.sub for AIX
1118 * Upgrade required version of autogen and libopts for building
1119 from our source code repository
1123 * Back-ported several fixes for Coverity warnings from ntp-dev
1124 * Fix a rare boundary condition in UNLINK_EXPR_SLIST()
1125 * Allow "logconfig =allall" configuration directive
1126 * Bind tentative IPv6 addresses on Linux
1127 * Correct WWVB/Spectracom driver to timestamp CR instead of LF
1128 * Improved tally bit handling to prevent incorrect ntpq peer status reports
1129 * Exclude the Undisciplined Local Clock and ACTS drivers from the initial
1130 candidate list unless they are designated a "prefer peer"
1131 * Prevent the consideration of Undisciplined Local Clock or ACTS drivers for
1132 selection during the 'tos orphanwait' period
1133 * Prefer an Orphan Mode Parent over the Undisciplined Local Clock or ACTS
1135 * Improved support of the Parse Refclock trusttime flag in Meinberg mode
1136 * Back-port utility routines from ntp-dev: mprintf(), emalloc_zero()
1137 * Added the NTPD_TICKADJ_PPM environment variable for specifying baseline
1138 clock slew on Microsoft Windows
1139 * Code cleanup in libntpq
1143 * Fix timerstats reporting
1147 * Reduce time required to set clock
1148 * Allow a timeout greater than 2 seconds
1152 * Backward incompatible command-line option change:
1153 -l/--filelog changed -l/--logfile (to be consistent with ntpd)
1157 * Update html2man. Fix some tags in the .html files
1158 * Distribute ntp-wait.html
1161 NTP 4.2.6p3 (Harlan Stenn <stenn@ntp.org>, 2011/01/03)
1163 Focus: Bug fixes and portability improvements
1167 This is a recommended upgrade.
1169 This release includes build infrastructure updates, code
1170 clean-ups, minor bug fixes, fixes for a number of minor
1171 ref-clock issues, and documentation revisions.
1173 Portability improvements in this release affect AIX, Atari FreeMiNT,
1174 FreeBSD4, Linux and Microsoft Windows.
1176 New features / changes in this release:
1179 * Use lsb_release to get information about Linux distributions.
1180 * 'test' is in /usr/bin (instead of /bin) on some systems.
1181 * Basic sanity checks for the ChangeLog file.
1182 * Source certain build files with ./filename for systems without . in PATH.
1183 * IRIX portability fix.
1184 * Use a single copy of the "libopts" code.
1185 * autogen/libopts upgrade.
1186 * configure.ac m4 quoting cleanup.
1189 * Do not bind to IN6_IFF_ANYCAST addresses.
1190 * Log the reason for exiting under Windows.
1191 * Multicast fixes for Windows.
1192 * Interpolation fixes for Windows.
1193 * IPv4 and IPv6 Multicast fixes.
1194 * Manycast solicitation fixes and general repairs.
1195 * JJY refclock cleanup.
1196 * NMEA refclock improvements.
1197 * Oncore debug message cleanup.
1198 * Palisade refclock now builds under Linux.
1199 * Give RAWDCF more baud rates.
1200 * Support Truetime Satellite clocks under Windows.
1201 * Support Arbiter 1093C Satellite clocks under Windows.
1202 * Make sure that the "filegen" configuration command defaults to "enable".
1203 * Range-check the status codes (plus other cleanup) in the RIPE-NCC driver.
1204 * Prohibit 'includefile' directive in remote configuration command.
1205 * Fix 'nic' interface bindings.
1206 * Fix the way we link with openssl if openssl is installed in the base
1211 * OpenSSL version display cleanup.
1214 * Many counters should be treated as unsigned.
1217 * Do not ignore replies with equal receive and transmit timestamps.
1220 * libntpq warning cleanup.
1223 * Correct SNMP type for "precision" and "resolution".
1224 * Update the MIB from the draft version to RFC-5907.
1227 * Display timezone offset when showing time for sntp in the local
1229 * Pay proper attention to RATE KoD packets.
1230 * Fix a miscalculation of the offset.
1231 * Properly parse empty lines in the key file.
1233 * Use tv_usec correctly in set_time().
1234 * Documentation cleanup.
1237 NTP 4.2.6p2 (Harlan Stenn <stenn@ntp.org>, 2010/07/08)
1239 Focus: Bug fixes and portability improvements
1243 This is a recommended upgrade.
1245 This release includes build infrastructure updates, code
1246 clean-ups, minor bug fixes, fixes for a number of minor
1247 ref-clock issues, improved KOD handling, OpenSSL related
1248 updates and documentation revisions.
1250 Portability improvements in this release affect Irix, Linux,
1251 Mac OS, Microsoft Windows, OpenBSD and QNX6
1253 New features / changes in this release:
1256 * Range syntax for the trustedkey configuration directive
1257 * Unified IPv4 and IPv6 restrict lists
1260 * Rate limiting and KOD handling
1263 * default connection to net-snmpd via a unix-domain socket
1264 * command-line 'socket name' option
1267 * support for the "passwd ..." syntax
1268 * key-type specific password prompts
1271 * MD5 authentication of an ntpd
1272 * Broadcast and crypto
1276 NTP 4.2.6p1 (Harlan Stenn <stenn@ntp.org>, 2010/04/09)
1278 Focus: Bug fixes, portability fixes, and documentation improvements
1282 This is a recommended upgrade.
1285 NTP 4.2.6 (Harlan Stenn <stenn@ntp.org>, 2009/12/08)
1287 Focus: enhancements and bug fixes.
1290 NTP 4.2.4p8 (Harlan Stenn <stenn@ntp.org>, 2009/12/08)
1292 Focus: Security Fixes
1296 This release fixes the following high-severity vulnerability:
1298 * [Sec 1331] DoS with mode 7 packets - CVE-2009-3563.
1300 See http://support.ntp.org/security for more information.
1302 NTP mode 7 (MODE_PRIVATE) is used by the ntpdc query and control utility.
1303 In contrast, ntpq uses NTP mode 6 (MODE_CONTROL), while routine NTP time
1304 transfers use modes 1 through 5. Upon receipt of an incorrect mode 7
1305 request or a mode 7 error response from an address which is not listed
1306 in a "restrict ... noquery" or "restrict ... ignore" statement, ntpd will
1307 reply with a mode 7 error response (and log a message). In this case:
1309 * If an attacker spoofs the source address of ntpd host A in a
1310 mode 7 response packet sent to ntpd host B, both A and B will
1311 continuously send each other error responses, for as long as
1312 those packets get through.
1314 * If an attacker spoofs an address of ntpd host A in a mode 7
1315 response packet sent to ntpd host A, A will respond to itself
1316 endlessly, consuming CPU and logging excessively.
1318 Credit for finding this vulnerability goes to Robin Park and Dmitri
1319 Vinokurov of Alcatel-Lucent.
1321 THIS IS A STRONGLY RECOMMENDED UPGRADE.
1324 ntpd now syncs to refclocks right away.
1326 Backward-Incompatible changes:
1328 ntpd no longer accepts '-v name' or '-V name' to define internal variables.
1329 Use '--var name' or '--dvar name' instead. (Bug 817)
1332 NTP 4.2.4p7 (Harlan Stenn <stenn@ntp.org>, 2009/05/04)
1334 Focus: Security and Bug Fixes
1338 This release fixes the following high-severity vulnerability:
1340 * [Sec 1151] Remote exploit if autokey is enabled. CVE-2009-1252
1342 See http://support.ntp.org/security for more information.
1344 If autokey is enabled (if ntp.conf contains a "crypto pw whatever"
1345 line) then a carefully crafted packet sent to the machine will cause
1346 a buffer overflow and possible execution of injected code, running
1347 with the privileges of the ntpd process (often root).
1349 Credit for finding this vulnerability goes to Chris Ries of CMU.
1351 This release fixes the following low-severity vulnerabilities:
1353 * [Sec 1144] limited (two byte) buffer overflow in ntpq. CVE-2009-0159
1354 Credit for finding this vulnerability goes to Geoff Keating of Apple.
1356 * [Sec 1149] use SO_EXCLUSIVEADDRUSE on Windows
1357 Credit for finding this issue goes to Dave Hart.
1359 This release fixes a number of bugs and adds some improvements:
1362 * Fix many compiler warnings
1363 * Many fixes and improvements for Windows
1364 * Adds support for AIX 6.1
1365 * Resolves some issues under MacOS X and Solaris
1367 THIS IS A STRONGLY RECOMMENDED UPGRADE.
1370 NTP 4.2.4p6 (Harlan Stenn <stenn@ntp.org>, 2009/01/07)
1376 This release fixes oCERT.org's CVE-2009-0021, a vulnerability affecting
1377 the OpenSSL library relating to the incorrect checking of the return
1378 value of EVP_VerifyFinal function.
1380 Credit for finding this issue goes to the Google Security Team for
1381 finding the original issue with OpenSSL, and to ocert.org for finding
1382 the problem in NTP and telling us about it.
1384 This is a recommended upgrade.
1386 NTP 4.2.4p5 (Harlan Stenn <stenn@ntp.org>, 2008/08/17)
1388 Focus: Minor Bugfixes
1390 This release fixes a number of Windows-specific ntpd bugs and
1391 platform-independent ntpdate bugs. A logging bugfix has been applied
1392 to the ONCORE driver.
1394 The "dynamic" keyword and is now obsolete and deferred binding to local
1395 interfaces is the new default. The minimum time restriction for the
1396 interface update interval has been dropped.
1398 A number of minor build system and documentation fixes are included.
1400 This is a recommended upgrade for Windows.
1403 NTP 4.2.4p4 (Harlan Stenn <stenn@ntp.org>, 2007/09/10)
1405 Focus: Minor Bugfixes
1407 This release updates certain copyright information, fixes several display
1408 bugs in ntpdc, avoids SIGIO interrupting malloc(), cleans up file descriptor
1409 shutdown in the parse refclock driver, removes some lint from the code,
1410 stops accessing certain buffers immediately after they were freed, fixes
1411 a problem with non-command-line specification of -6, and allows the loopback
1412 interface to share addresses with other interfaces.
1415 NTP 4.2.4p3 (Harlan Stenn <stenn@ntp.org>, 2007/06/29)
1417 Focus: Minor Bugfixes
1419 This release fixes a bug in Windows that made it difficult to
1420 terminate ntpd under windows.
1421 This is a recommended upgrade for Windows.
1424 NTP 4.2.4p2 (Harlan Stenn <stenn@ntp.org>, 2007/06/19)
1426 Focus: Minor Bugfixes
1428 This release fixes a multicast mode authentication problem,
1429 an error in NTP packet handling on Windows that could lead to
1430 ntpd crashing, and several other minor bugs. Handling of
1431 multicast interfaces and logging configuration were improved.
1432 The required versions of autogen and libopts were incremented.
1433 This is a recommended upgrade for Windows and multicast users.
1436 NTP 4.2.4 (Harlan Stenn <stenn@ntp.org>, 2006/12/31)
1438 Focus: enhancements and bug fixes.
1440 Dynamic interface rescanning was added to simplify the use of ntpd in
1441 conjunction with DHCP. GNU AutoGen is used for its command-line options
1442 processing. Separate PPS devices are supported for PARSE refclocks, MD5
1443 signatures are now provided for the release files. Drivers have been
1444 added for some new ref-clocks and have been removed for some older
1445 ref-clocks. This release also includes other improvements, documentation
1448 K&R C is no longer supported as of NTP-4.2.4. We are now aiming for ANSI
1452 NTP 4.2.0 (Harlan Stenn <stenn@ntp.org>, 2003/10/15)
1454 Focus: enhancements and bug fixes.
projects / FreeBSD / releng / 10.2.git / blob