Stephane Chazelas discovered the bytecode engine of ClamAV improperly handled recursion under certain circumstances. This could allow a remote attacker to craft a file that could cause ClamAV to crash, resulting in a denial of service. Updated packages are available from security.ubuntu.com.
========================================================================== Ubuntu Security Notice USN-1258-1 November 10, 2011 clamav vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 11.10 - Ubuntu 11.04 - Ubuntu 10.10 - Ubuntu 10.04 LTS Summary: ClamAV could be made to crash or run programs as your login if it opened a specially crafted file. Software Description: - clamav: Anti-virus utility for Unix Details: Stephane Chazelas discovered the bytecode engine of ClamAV improperly handled recursion under certain circumstances. This could allow a remote attacker to craft a file that could cause ClamAV to crash, resulting in a denial of service. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 11.10: libclamav6 0.97.3+dfsg-1ubuntu0.11.10.1 Ubuntu 11.04: libclamav6 0.97.3+dfsg-1ubuntu0.11.04.1 Ubuntu 10.10: libclamav6 0.96.5+dfsg-1ubuntu18.104.22.168 Ubuntu 10.04 LTS: libclamav6 0.96.5+dfsg-1ubuntu1.10.04.3 In general, a standard system update will make all the necessary changes. References: http://www.ubuntu.com/usn/usn-1258-1 CVE-2011-3627 Package Information: https://launchpad.net/ubuntu/+source/clamav/0.97.3+dfsg-1ubuntu0.11.10.1 https://launchpad.net/ubuntu/+source/clamav/0.97.3+dfsg-1ubuntu0.11.04.1 https://launchpad.net/ubuntu/+source/clamav/0.96.5+dfsg-1ubuntu22.214.171.124 https://launchpad.net/ubuntu/+source/clamav/0.96.5+dfsg-1ubuntu1.10.04.3