r1 - 2015-10-23 - 09:03:11 - HarlanStennYou are here: NTP >  Main Web > SecurityNotice > NtpBug2899 > NtpBug2671
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ntp-4.2.8p10 was released on 21 March 2017. It addresses 6 medium- and 5 low-severity security issues, 4 informational security topics, 15 bugfixes, and contains other improvements over 4.2.8p9.

Please see the NTP Security Notice for vulnerability and mitigation details.

Are you using Autokey in production? If so, please contact Harlan - he's got some questions for you.

NTP Bug 2671

vallen is not validated in several places in ntp_crypto.c, leading to a potential info leak or possibly crashing ntpd.

  • References: Sec 2671 / CVE-2014-9297 / VU#852879
  • Affects: All NTP4 releases before 4.2.8p1 that are running autokey.
  • CVSS: (AV:N/AC:L/Au:N/C:P/I:P/A:P) Base Score: 7.5
  • Date Resolved: Stable (4.2.8p1) 04 Feb 2015
  • Summary: The vallen packet value is not validated in several code paths in ntp_crypto.c which can lead to information leakage or a possible crash of ntpd.
  • Mitigation - any of:
  • Credit: This vulnerability was discovered by Stephen Roettger of the Google Security Team, with additional cases found by Sebastian Krahmer of the SUSE Security Team and Harlan Stenn of Network Time Foundation.
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