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Secunia Advisory SA13822

Linux Kernel Page Fault Handler Privilege Escalation
Secunia Advisory SA13822
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Release Date 2005-01-13
Last Update 2005-06-14
   
Popularity 16,981 views
Comments 0 comments

Criticality level Less criticalLess critical
Impact Privilege escalation
Where Local system
Authentication level Available in Customer Area
   
Report reliability Available in Customer Area
Solution Status Partial Fix
   
Systems affected Available in Customer Area
Approve distribution Available in Customer Area
   
Operating System
Linux Kernel 2.4.x
Linux Kernel 2.6.x

Secunia CVSS Score Available in Customer Area
CVE Reference(s) CVE-2005-0001 CVSS available in Customer Area
  

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.
Further details available in Customer Area

Provided and/or discovered by
Paul Starzetz

Changelog
Further details available in Customer Area

Original Advisory
http://www.isec.pl/vulnerabilities/isec-0022-pagefault.txt

Deep Links
Links available in Customer Area


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 Page Fault Handler Privilege Escalation
 
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