USN-385-1: tar vulnerability

27 November 2006

tar vulnerability

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

  • Ubuntu 6.10
  • Ubuntu 6.06 LTS
  • Ubuntu 5.10

Software Description


Teemu Salmela discovered that tar still handled the deprecated GNUTYPE_NAMES record type. This record type could be used to create symlinks that would be followed while unpacking a tar archive. If a user or an automated system were tricked into unpacking a specially crafted tar file, arbitrary files could be overwritten with user privileges.

Update instructions

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

Ubuntu 6.10
tar - 1.15.91-2ubuntu0.3
Ubuntu 6.06 LTS
tar - 1.15.1-2ubuntu2.1
Ubuntu 5.10
tar - 1.15.1-2ubuntu0.2

To update your system, please follow these instructions:

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