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NTP Bug 1593

ntpd abort in free() with logconfig syntax error

  • Date Resolved: Development (4.2.7p42) 18 Aug 2010, Stable (4.2.8) 19 Dec 2014
  • References: Bug 1593 / CVE-2015-5194
  • Affects: All ntp-4 releases up to and including 4.2.7p41.
  • CVSS: (AV:N/AC:H/Au:M/C:N/I:N/A:P) Base Score: 1.7 (worst case)
  • Summary: If ntpd is not built with OpenSSL cryptography and ntpd is told to configure cryptography statistics, ntpd will crash.
  • Mitigation:
    • Don't specify cryptography statistics directives in unpatched releases of ntpd if your ntpd doesn't support cryptography.
    • Upgrade to 4.2.8p4, or later, from the NTP Project Download Page or the NTP Public Services Project Download Page. Yes, you could upgrade to 4.2.7p42 or later, but why would you want to run an intermediate development version instead of the latest supported stable version?
    • Monitor your ntpd instances.
  • Credit: This issue was discovered and fixed by Dave Hart in 2010.


This topic: Main > SecurityNotice > NtpBug1593
Topic revision: r1 - 2015-10-23 - 08:58:28 - HarlanStenn
 
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