USN-2497-1: NTP vulnerabilities

Ubuntu Security Notice USN-2497-1

9th 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

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 version:

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: http://bit.ly/1aJDvTw.

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

References

CVE-2014-9297, CVE-2014-9298

from Ubuntu Security Notices http://bit.ly/1Fqv8MC