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=========================================================== Ubuntu Security Notice USN-539-1 November 06, 2007 cupsys vulnerability CVE-2007-4351 =========================================================== 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: cupsys 1.2.2-0ubuntu0.6.06.4 Ubuntu 6.10: cupsys 1.2.4-2ubuntu3.1 Ubuntu 7.04: cupsys 1.2.8-0ubuntu8.1 Ubuntu 7.10: cupsys 1.3.2-1ubuntu7.1 In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: Alin Rad Pop discovered that CUPS did not correctly validate buffer lengths when processing IPP tags. Remote attackers successfully exploiting this vulnerability would gain access to the non-root CUPS user in Ubuntu 6.06 LTS, 6.10, and 7.04. In Ubuntu 7.10, attackers would be isolated by the AppArmor CUPS profile.