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=========================================================== Ubuntu Security Notice USN-696-1 December 18, 2008 avahi vulnerabilities CVE-2007-3372, CVE-2008-5081 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 6.06 LTS Ubuntu 7.10 Ubuntu 8.04 LTS Ubuntu 8.10 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: avahi-daemon 0.6.10-0ubuntu3.5 Ubuntu 7.10: avahi-daemon 0.6.20-2ubuntu3.4 Ubuntu 8.04 LTS: avahi-daemon 0.6.22-2ubuntu4.1 Ubuntu 8.10: avahi-daemon 0.6.23-2ubuntu2.1 In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: Emanuele Aina discovered that Avahi did not properly validate its input when processing data over D-Bus. A local attacker could send an empty TXT message via D-Bus and cause a denial of service (failed assertion). This issue only affected Ubuntu 6.06 LTS. (CVE-2007-3372) Hugo Dias discovered that Avahi did not properly verify its input when processing mDNS packets. A remote attacker could send a crafted mDNS packet and cause a denial of service (assertion failure). (CVE-2008-5081)