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Insecure Library Loading
Not critical

Linux Kernel SMP "/proc" Race Condition Denial of Service

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Release Date:  2006-05-31    Views:  13,602

Secunia Advisory SA20349

Where:

Local system

Impact:

DoS

Solution Status:

Unpatched

Operating System:

CVE Reference(s):

Description


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

The vulnerability is cause due to a memory corruption error in the "dentry_unused" list within the "prune_dcache()" function. This can be exploited to crash the kernel when running on SMP hardware by causing a race condition such that one or more tasks exit while another task is reading their /proc entries.

The vulnerability has been reported in versions 2.6.15 through 2.6.17. Other versions may also be affected.


Solution:
Grant only trusted users access to affected systems.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Tony Griffiths

Original Advisory:
http://marc.theaimsgroup.com/?l=linux-kernel&m=114860432801543&w=2

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 SMP "/proc" Race Condition Denial of Service

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