USN-705-1: NTP vulnerability

8 January 2009

ntp vulnerability

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

  • Ubuntu 8.10
  • Ubuntu 8.04 LTS
  • Ubuntu 7.10
  • Ubuntu 6.06 LTS

Software Description

  • ntp


It was discovered that NTP did not properly perform signature verification. A remote attacker could exploit this to bypass certificate validation via a malformed SSL/TLS signature.

Update instructions

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

Ubuntu 8.10
ntp - 1:4.2.4p4+dfsg-6ubuntu2.2
Ubuntu 8.04 LTS
ntp - 1:4.2.4p4+dfsg-3ubuntu2.1
Ubuntu 7.10
ntp - 1:4.2.4p0+dfsg-1ubuntu2.1
Ubuntu 6.06 LTS
ntp-refclock - 1:4.2.0a+stable-8.1ubuntu6.1
ntp-simple - 1:4.2.0a+stable-8.1ubuntu6.1

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the necessary changes.