USN-1038-1: dpkg vulnerability
Ubuntu Security Notice USN-1038-1
6th January, 2011
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 9.10
A malicious source package could write files outside the unpack directory.
- dpkg - Debian package management system
Jakub Wilk and Raphael Hertzog discovered that dpkg-source did not
correctly handle certain paths and symlinks when unpacking source-format
version 3.0 packages. If a user or an automated system were tricked into
unpacking a specially crafted source package, a remote attacker could
modify files outside the target unpack directory, leading to a denial
of service or potentially gaining access to the system.
The problem can be corrected by updating your system to the following package version:
- Ubuntu 10.10:
- dpkg-dev 22.214.171.124ubuntu3.1
- Ubuntu 10.04 LTS:
- dpkg-dev 126.96.36.199ubuntu4.5
- Ubuntu 9.10:
- dpkg-dev 1.15.4ubuntu2.3
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.