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=========================================================== Ubuntu Security Notice USN-370-1 October 31, 2006 screen vulnerability CVE-2006-4573 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 5.04 Ubuntu 5.10 Ubuntu 6.06 LTS Ubuntu 6.10 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 5.04: screen 4.0.2-4.1ubuntu2.5.04 Ubuntu 5.10: screen 4.0.2-4.1ubuntu2.5.10 Ubuntu 6.06 LTS: screen 4.0.2-4.1ubuntu5.6.06 Ubuntu 6.10: screen 4.0.2-4.1ubuntu5.6.10 After a standard system upgrade you need to restart any running screen sessions to effect the necessary changes. Details follow: cstone and Rich Felker discovered a programming error in the UTF8 string handling code of "screen" leading to a denial of service. If a crafted string was displayed within a screen session, screen would crash or possibly execute arbitrary code.