Description: Luke Hutchison has reported a vulnerability in XFree86, which potentially can be exploited by malicious, local users to gain escalated privileges.
The vulnerability is caused due to an integer overflow in the allocation of pixmaps. This can be exploited to cause a heap based buffer overflow by creating an overly large pixmap.
Successful exploitation may lead to execution of arbitrary code.
Solution: Grant only trusted users access to affected systems.
Provided and/or discovered by: Luke Hutchison
Changelog: 2005-09-26: Added link to US-CERT vulnerability note.
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