=========================================================================Ubuntu Security Notice USN-2497-1
February 09, 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

Summary:

Several security issues were fixed in NTP.

Software Description:
- ntp: Network Time Protocol daemon and utility programs

Details:

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

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

References:
  https://ubuntu.com/security/notices/USN-2497-1
  CVE-2014-9297, CVE-2014-9298

Package Information:
  https://launchpad.net/ubuntu/+source/ntp/1:4.2.6.p5+dfsg-3ubuntu2.14.10.2
  https://launchpad.net/ubuntu/+source/ntp/1:4.2.6.p5+dfsg-3ubuntu2.14.04.2
  https://launchpad.net/ubuntu/+source/ntp/1:4.2.6.p3+dfsg-1ubuntu3.3
  https://launchpad.net/ubuntu/+source/ntp/1:4.2.4p8+dfsg-1ubuntu2.3