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Linux Kernel "install_user_keyrings()" Race Condition Vulnerability

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Release Date:  2013-03-07    Last Update:  2014-02-13    Views:  2,208

Secunia Advisory SA52441

Where:

Local system

Impact:

DoS

Solution Status:

Vendor Patch

CVE Reference(s):

Description


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

A race condition error within the "install_user_keyrings()" function (security/keys/process_keys.c) when the "uid" and "uid-session" are not created can be exploited to dereference a NULL-pointer and cause a crash.

The vulnerability is reported in versions prior to 2.6.32.61, 2.6.34.15, and 3.8.3.


Solution:
Update to version 2.6.32.61, 2.6.34.15, or 3.8.3.

Further details available to Secunia VIM customers

Provided and/or discovered by:
The vendor credits Mateusz Guzik, Red Hat.

Original Advisory:
https://www.kernel.org/pub/linux/kernel/v2.6/longterm/v2.6.32/ChangeLog-2.6.32.61
https://www.kernel.org/pub/linux/kernel/v3.0/ChangeLog-3.8.3
https://lkml.org/lkml/2013/3/6/535
http://www.openwall.com/lists/oss-security/2013/03/07/1
https://www.kernel.org/pub/linux/kernel/v2.6/longterm/v2.6.34/ChangeLog-2.6.34.15

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 "install_user_keyrings()" Race Condition Vulnerability

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