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=========================================================== Ubuntu Security Notice USN-459-1 May 14, 2007 pptpd vulnerability CVE-2007-0244 =========================================================== 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: pptpd 1.2.3-1ubuntu0.1 Ubuntu 6.10: pptpd 1.3.0-1ubuntu1.1 Ubuntu 7.04: pptpd 1.3.0-2ubuntu2.1 In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: A flaw was discovered in the PPTP tunnel server. Remote attackers could send a specially crafted packet and disrupt established PPTP tunnels, leading to a denial of service.