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=========================================================== Ubuntu Security Notice USN-835-1 September 21, 2009 neon, neon27 vulnerabilities CVE-2008-3746, CVE-2009-2474 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 6.06 LTS Ubuntu 8.04 LTS Ubuntu 8.10 Ubuntu 9.04 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: libneon25 0.25.5.dfsg-5ubuntu0.1 Ubuntu 8.04 LTS: libneon27 0.27.2-1ubuntu0.1 libneon27-gnutls 0.27.2-1ubuntu0.1 Ubuntu 8.10: libneon27 0.28.2-2ubuntu0.1 libneon27-gnutls 0.28.2-2ubuntu0.1 Ubuntu 9.04: libneon27 0.28.2-6.1ubuntu0.1 libneon27-gnutls 0.28.2-6.1ubuntu0.1 In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: Joe Orton discovered that neon did not correctly handle SSL certificates with zero bytes in the Common Name. A remote attacker could exploit this to perform a man in the middle attack to view sensitive information or alter encrypted communications.