REDHAT-BUG-447759

First published: Wed May 21 2008(Updated: )

Description of problem: The recent fix to validate the frontend's frame buffer description neglected to limit the frame buffer size correctly. This lets a malicious frontend make the backend attempt to map an arbitrary amount of guest memory, which could be useful for a denial of service attack against dom0. Proposed upstream patch: <a href="http://xenbits.xensource.com/xen-unstable.hg?rev/9044705960cb30cec385bdca7305bcf7db096721">http://xenbits.xensource.com/xen-unstable.hg?rev/9044705960cb30cec385bdca7305bcf7db096721</a>

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• alias/CVE-2008-1952
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