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=========================================================== Ubuntu Security Notice USN-550-1 December 03, 2007 libcairo vulnerability CVE-2007-5503 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 6.06 LTS Ubuntu 6.10 Ubuntu 7.04 Ubuntu 7.10 This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 6.06 LTS: libcairo2 1.0.4-0ubuntu1.1 Ubuntu 6.10: libcairo2 1.2.4-1ubuntu2.1 Ubuntu 7.04: libcairo2 1.4.2-0ubuntu1.1 Ubuntu 7.10: libcairo2 1.4.10-1ubuntu4.1 After a standard system upgrade you need to restart your session to effect the necessary changes. Details follow: Peter Valchev discovered that Cairo did not correctly decode PNG image data. By tricking a user or automated system into processing a specially crafted PNG with Cairo, a remote attacker could execute arbitrary code with user privileges.