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Linux Kernel FASYNC Use-After-Free Privilege Escalation Vulnerability

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Release Date:  2010-01-14    Last Update:  2010-01-19    Views:  7,044

Secunia Advisory SA38199

Where:

Local system

Impact:

Privilege escalation

Solution Status:

Vendor Patch

Operating System:

CVE Reference(s):

Description


A vulnerability has been reported in the Linux Kernel, which can be exploited by malicious, local users to gain escalated privileges.

The vulnerability is caused due to a use-after-free error within the handling of file descriptors with the FASYNC flag set. This can be exploited to e.g. cause a crash or execute arbitrary code with kernel privileges.

The vulnerability is reported in version 2.6.28 and later.


Solution:
Update to version 2.6.31.12 or 2.6.32.4.

Provided and/or discovered by:
Tavis Ormandy, Google.

Original Advisory:
http://archives.neohapsis.com/archives/fulldisclosure/2010-01/0252.html

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=log;h=53281b6d34d44308372d16acb7fb5327609f68b6

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Linux Kernel FASYNC Use-After-Free Privilege Escalation Vulnerability

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