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TITLE:
Linux Kernel "madvise_remove()" Use-After-Free Vulnerability

SECUNIA ADVISORY ID:
SA50310

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/50310/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=50310

RELEASE DATE:
2012-08-22

DISCUSS ADVISORY:
http://secunia.com/advisories/50310/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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 * Comments
 * Criticality Level
 * Impact
 * Where
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 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/50310/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=50310

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
A vulnerability has been reported in Linux Kernel, which can be
exploited by malicious, local users to cause a DoS (Denial of
Service).

The vulnerability is caused due to a use-after-free error in the
"madvise_remove()" function and can be exploited to dereference
already freed memory.

SOLUTION:
Update to version 3.0.37, 3.2.23, 3.4.5, or apply fix in the GIT
repository for version 2.6.x.

PROVIDED AND/OR DISCOVERED BY:
Andy Lutomirski

ORIGINAL ADVISORY:
Kernel.org:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=9ab4233dd08036fe34a89c7dc6f47a8bf2eb29eb
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.0.37
http://www.kernel.org/pub/linux/kernel/v3.0/ChangeLog-3.2.23
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.5

Red Hat:
https://bugzilla.redhat.com/show_bug.cgi?id=849734

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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