CVE-2011-0726 Information

Description

The do_task_stat function in fs/proc/array.c in the Linux kernel before 2.6.39-rc1 does not perform an expected uid check which makes it easier for local users to defeat the ASLR protection mechanism by reading the start_code and end_code fields in the /proc//stat file for a process executing a PIE binary.

Reference

http://downloads.avaya.com/css/P8/documents/100145416 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5883f57ca0008ffc93e09cbb9847a1928e50c6f3 http://rhn.redhat.com/errata/RHSA-2011-0833.html http://www.kernel.org/pub/linux/kernel/v2.6/testing/v2.6.39/ChangeLog-2.6.39-rc1 http://www.securityfocus.com/bid/47791 http://www.spinics.net/lists/mm-commits/msg82726.html https://bugzilla.redhat.com/show_bug.cgi?id=684569 https://lkml.org/lkml/2011/3/11/380