The backend for XenSource Xen Para Virtualized Frame Buffer (PVFB) in Xen ioemu does not properly restrict the frame buffer size, which allows attackers to cause a denial of service (crash) by mapping an arbitrary amount of guest memory.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| http://secunia.com/advisories/32088 | third party advisory vendor advisory |
| http://www.openwall.com/lists/oss-security/2008/05/21/9 | mailing list patch |
| http://xenbits.xensource.com/xen-unstable.hg?rev/9044705960cb30cec385bdca7305bcf7db096721 | patch |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11189 | vdb entry signature |
| http://www.securitytracker.com/id?1020957 | vdb entry |
| http://lists.xensource.com/archives/html/xen-devel/2008-05/msg00421.html | mailing list |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/43362 | vdb entry |
| https://rhn.redhat.com/errata/RHSA-2008-0892.html | vendor advisory |
| http://www.securityfocus.com/bid/30646 | vdb entry |