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=========================================================== Ubuntu Security Notice USN-513-1 September 18, 2007 qt-x11-free vulnerability CVE-2007-4137 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 6.06 LTS Ubuntu 6.10 Ubuntu 7.04 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: libqt3-mt 3:3.3.6-1ubuntu6.4 Ubuntu 6.10: libqt3-mt 3:3.3.6-3ubuntu3.3 Ubuntu 7.04: libqt3-mt 3:3.3.8really3.3.7-0ubuntu5.2 After a standard system upgrade you need to restart your session to effect the necessary changes. Details follow: Dirk Mueller discovered that UTF8 strings could be made to cause a small buffer overflow. A remote attacker could exploit this by sending specially crafted strings to applications that use the Qt3 library for UTF8 processing, potentially leading to arbitrary code execution with user privileges, or a denial of service.