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Linux Kernel Page Fault Handler Privilege Escalation
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Secunia Advisory:
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SA13822
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Release Date:
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2005-01-13
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Last Update:
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2005-06-14
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Popularity:
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12,995 views
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Critical:
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Less critical
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Impact:
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Privilege escalation
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Where:
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Local system
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Solution Status:
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Partial Fix
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| OS: | Linux Kernel 2.4.x
Linux Kernel 2.6.x
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| CVE reference: | CVE-2005-0001
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Description:
Paul Starzetz has reported a vulnerability in the Linux kernel, which can be exploited by malicious, local users to gain escalated privileges.
The vulnerability is caused due to a race condition in the page fault handler when two threads, which share the same virtual memory space, request a stack expansion simultaneously.
Successful exploitation may allow execution of arbitrary code with root privileges on multi-processor systems.
The vulnerability has been reported in versions 2.4 through 2.4.29-rc1 and 2.6 through 2.6.10.
Solution:
Update to version 2.6.11.
http://kernel.org/
Grant only trusted users access to affected systems.
Provided and/or discovered by:
Paul Starzetz
Changelog:
2005-06-14: Updated "Solution" section.
Original Advisory:
http://www.isec.pl/vulnerabilities/isec-0022-pagefault.txt
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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.
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