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TITLE:
Linux Kernel "PER_CLEAR_ON_SETID" Security Issue

SECUNIA ADVISORY ID:
SA35801

VERIFY ADVISORY:
http://secunia.com/advisories/35801/

DESCRIPTION:
A security issue has been reported in the Linux Kernel, which can be
exploited by malicious, local users to bypass certain security
restriction.

The security issue is caused due to the PER_CLEAR_ON_SETID mask not
containing MMAP_PAGE_ZERO and ADDR_COMPAT_LAYOUT, which potentially
can be used to e.g. bypass the mmap_min_addr protection or disable
certain ASLR (Address Space Layout Randomization) features.

SOLUTION:
Fixed in the GIT repository.
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=f9fabcb58a6d26d6efde842d1703ac7cfa9427b6

PROVIDED AND/OR DISCOVERED BY:
Julien Tinnes and Tavis Ormandy

ORIGINAL ADVISORY:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=f9fabcb58a6d26d6efde842d1703ac7cfa9427b6

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