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Linux Kernel SMP "/proc" Race Condition Denial of Service
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Secunia Advisory:
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SA20349
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Release Date:
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2006-05-31
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Popularity:
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9,066 views
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Critical:
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Not critical
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Impact:
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DoS
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Where:
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Local system
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Solution Status:
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Unpatched
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| OS: | Linux Kernel 2.6.x
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| CVE reference: | CVE-2006-2629
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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.
Secunia is currently not aware of an official version addressing this.
Provided and/or discovered by:
Tony Griffiths
Original Advisory:
http://marc.theaimsgroup.com/?l=linux-kernel&m=114860432801543&w=2
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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