USN-349-1: gzip vulnerabilities

20 September 2006

gzip vulnerabilities

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

  • Ubuntu 6.06 LTS
  • Ubuntu 5.10
  • Ubuntu 5.04

Software Description


Tavis Ormandy discovered that gzip did not sufficiently verify the validity of gzip or compress archives while unpacking. By tricking an user or automated system into unpacking a specially crafted compressed file, this could be exploited to execute arbitrary code with the user’s privileges.

Update instructions

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

Ubuntu 6.06 LTS
gzip - 1.3.5-12ubuntu0.1
Ubuntu 5.10
gzip - 1.3.5-11ubuntu2.1
Ubuntu 5.04
gzip - 1.3.5-9ubuntu3.5

To update your system, please follow these instructions:

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