1. Ubuntu Security Notices
  2. USN-2183-2

USN-2183-2: dpkg vulnerability

Publication date

1 May 2014

Overview

A malicious source package could write files outside the unpack directory.

Releases

Packages

  • dpkg - Debian package management system

Details

USN-2183-1 fixed a vulnerability in dpkg. Javier Serrano Polo discovered
that the fix introduced a vulnerability in releases with an older version
of the patch utility. This update fixes the problem.

Original advisory details:

Jakub Wilk discovered that dpkg incorrectly certain paths and symlinks when
unpacking source 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.

USN-2183-1 fixed a vulnerability in dpkg. Javier Serrano Polo discovered
that the fix introduced a vulnerability in releases with an older version
of the patch utility. This update fixes the problem.

Original advisory details:

Jakub Wilk discovered that dpkg incorrectly certain paths and symlinks when
unpacking source 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.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
14.04 trusty libdpkg-perl –  1.17.5ubuntu5.2
13.10 saucy libdpkg-perl –  1.16.12ubuntu1.2
12.10 quantal libdpkg-perl –  1.16.7ubuntu6.2
12.04 precise libdpkg-perl –  1.16.1.2ubuntu7.4
10.04 lucid dpkg-dev –  1.15.5.6ubuntu4.8

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References

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