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=========================================================== Ubuntu Security Notice USN-383-1 November 16, 2006 libpng vulnerability CVE-2006-5793 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 5.10 Ubuntu 6.06 LTS Ubuntu 6.10 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 5.10: libpng10-0 1.0.18-1ubuntu3.1 Ubuntu 6.06 LTS: libpng12-0 1.2.8rel-5ubuntu0.1 Ubuntu 6.10: libpng12-0 1.2.8rel-5.1ubuntu0.1 After a standard system upgrade you need to reboot your computer to effect the necessary changes. Details follow: Tavis Ormandy discovered that libpng did not correctly calculate the size of sPLT structures when reading an image. By tricking a user or an automated system into processing a specially crafted PNG file, an attacker could exploit this weakness to crash the application using the library.