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=========================================================== Ubuntu Security Notice USN-335-1 August 16, 2006 heartbeat vulnerability CVE-2006-3121 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 5.04 Ubuntu 5.10 Ubuntu 6.06 LTS 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 5.04: heartbeat 1.2.3-3ubuntu1.3 Ubuntu 5.10: heartbeat 1.2.3-12ubuntu0.2 Ubuntu 6.06 LTS: heartbeat 1.2.4-2ubuntu0.2 In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: Yan Rong Ge discovered that heartbeat did not sufficiently verify some packet input data, which could lead to an out-of-boundary memory access. A remote attacker could exploit this to crash the daemon (Denial of Service).