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Secunia Advisory SA11486

Linux Kernel Framebuffer Driver Direct Userspace Access Vulnerability
Secunia Advisory SA11486
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Release Date 2004-04-28
Last Update 2005-05-17
   
Popularity 15,101 views
Comments 0 comments

Criticality level Not criticalNot critical
Impact Security Bypass
DoS
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-2004-0229 CVSS available in Customer Area
  

Description

Arjan van de Ven has reported a vulnerability in the Linux Kernel, which can be exploited by malicious, local users to cause a DoS (Denial of Service).

The framebuffer driver reportedly uses the "fb_copy_cmap()" function incorrectly. The problem is that data is written to userspace directly instead of using the correct interfaces.

This may violate security boundaries and result in a DoS when copying data.


Solution
Update to version 2.6.6.
Further details available in Customer Area

Provided and/or discovered by
Arjan van de Ven

Changelog
Further details available in Customer Area

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 Framebuffer Driver Direct Userspace Access Vulnerability
 
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