USN-642-1: Postfix vulnerability

10 September 2008

postfix vulnerability

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

  • Ubuntu 8.04 LTS
  • Ubuntu 7.10

Software Description

  • postfix


Wietse Venema discovered that Postfix leaked internal file descriptors when executing non-Postfix commands. A local attacker could exploit this to cause Postfix to run out of descriptors, leading to a denial of service.

Update instructions

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

Ubuntu 8.04 LTS
postfix - 2.5.1-2ubuntu1.2
Ubuntu 7.10
postfix - 2.4.5-3ubuntu1.3

To update your system, please follow these instructions:

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