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=========================================================== Ubuntu Security Notice USN-461-1 May 17, 2007 quagga vulnerability CVE-2007-1995 =========================================================== 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: quagga 0.99.2-1ubuntu3.1 Ubuntu 6.10: quagga 0.99.4-4ubuntu1.1 Ubuntu 7.04: quagga 0.99.6-2ubuntu3.1 In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: It was discovered that Quagga did not correctly verify length information sent from configured peers. Remote malicious peers could send a specially crafted UPDATE message which would cause bgpd to abort, leading to a denial of service.