USN-2497-1: NTP vulnerabilities

9 February 2015

ntp vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 14.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS


Several security issues were fixed in NTP.

Software Description

  • ntp - Network Time Protocol daemon and utility programs


Stephen Roettger, Sebastian Krahmer, and Harlan Stenn discovered that NTP incorrectly handled the length value in extension fields. A remote attacker could use this issue to possibly obtain leaked information, or cause the NTP daemon to crash, resulting in a denial of service. (CVE-2014-9297)

Stephen Roettger discovered that NTP incorrectly handled ACLs based on certain IPv6 addresses. (CVE-2014-9298)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 14.10
ntp - 1:4.2.6.p5+dfsg-3ubuntu2.14.10.2
Ubuntu 14.04 LTS
ntp - 1:4.2.6.p5+dfsg-3ubuntu2.14.04.2
Ubuntu 12.04 LTS
ntp - 1:4.2.6.p3+dfsg-1ubuntu3.3
Ubuntu 10.04 LTS
ntp - 1:4.2.4p8+dfsg-1ubuntu2.3

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.