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>> Linux Kernel "fcntl_setlk()" and "close()" Race Prevention Vulnerability

Title : Linux Kernel "fcntl_setlk()" and "close()" Race Prevention Vulnerability
VUPEN ID : VUPEN/ADV-2008-1451
CVE ID : CVE-2008-1669
CWE ID : VUPEN VNS Only
CVSS V2 : VUPEN VNS Only
Rated as : Moderate Risk 
Remotely Exploitable : No
Locally Exploitable : Yes
Release Date : 2008-05-08


Technical Description    Receive VUPEN Security alerts in a Text format  Receive VUPEN Security alerts in a PDF format  Receive VUPEN Security alerts in an XML format 

A vulnerability has been identified in Linux Kernel, which could be exploited by attackers to bypass security restrictions. This issue is caused by a race condition in the "fcntl_setlk()" function when handling locks on SMP systems, which could allow a process that belongs to a local unprivileged user to gain re-ordered access to the descriptor table.

Affected Products

Linux Kernel versions prior to 2.6.25.2

Solution

Upgrade to Linux Kernel version 2.6.25.2 :
http://www.kernel.org/

References

http://www.vupen.com/english/advisories/2008/1451
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.25.2

Credits

Vulnerability reported by the vendor.

ChangeLog

2008-05-08 : Initial release

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