USN-2242-1: dpkg vulnerabilities

Ubuntu Security Notice USN-2242-1

10th June, 2014

dpkg vulnerabilities

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

  • Ubuntu 14.04 LTS
  • Ubuntu 13.10
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS

Summary

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

Software description

  • dpkg - Debian package management system

Details

It was discovered that dpkg incorrectly handled certain patches 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

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

Ubuntu 14.04 LTS:
libdpkg-perl 1.17.5ubuntu5.3
Ubuntu 13.10:
libdpkg-perl 1.16.12ubuntu1.3
Ubuntu 12.04 LTS:
libdpkg-perl 1.16.1.2ubuntu7.5
Ubuntu 10.04 LTS:
dpkg-dev 1.15.5.6ubuntu4.9

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.

References

CVE-2014-3864, CVE-2014-3865