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TITLE:
NetBSD x86 IRET Pre-Commit Failure Privilege Escalation

SECUNIA ADVISORY ID:
SA36775

VERIFY ADVISORY:
http://secunia.com/advisories/36775/

DESCRIPTION:
A vulnerability has been reported in NetBSD, which can be exploited
by malicious, local users to gain escalated privileges.

The vulnerability is caused due to the kernel incorrectly handling
pre-commit failures within the IRET instruction, which can be
exploited to e.g. gain escalated privileges.

Successful exploitation requires x86 systems.

SOLUTION:
Restrict access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Tavis Ormandy and Julien Tinnes, Google Security Team

ORIGINAL ADVISORY:
http://www.cr0.org/misc/CVE-2009-2793.txt

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