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Insecure Library Loading

Secunia Advisory SA36945

FreeBSD Devfs / VFS NULL Pointer Dereference Privilege Escalation
Secunia Advisory SA36945
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Release Date 2009-10-05
   
Popularity 1,602 view
Comments 0 comments

Criticality level Less criticalLess critical
Impact Privilege escalation
DoS
Where Local system
Authentication level Available in Customer Area
   
Report reliability Available in Customer Area
Solution Status Vendor Patch
   
Systems affected Available in Customer Area
Approve distribution Available in Customer Area
   
Operating System
FreeBSD 7.1
Secunia CVSS Score Available in Customer Area
CVE Reference(s) No CVE references.
  

Description

A vulnerability has been reported in FreeBSD, which can be exploited by malicious, local users to cause a DoS (Denial of Service) and potentially gain escalated privileges.

The vulnerability is caused due to a NULL pointer dereference error caused by a race condition within the devfs and VFS interaction. This can be exploited to e.g. execute arbitrary code with kernel privileges.

NOTE: Additionally, the vendor provides an enhancement against NULL pointer exploits.


Solution
Update FreeBSD or apply patches.
Further details available in Customer Area

Provided and/or discovered by
The vendor credits Przemyslaw Frasunek.

Original Advisory
http://security.freebsd.org/advisories/FreeBSD-SA-09:14.devfs.asc
http://security.freebsd.org/advisories/FreeBSD-EN-09:05.null.asc

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: FreeBSD Devfs / VFS NULL Pointer Dereference Privilege Escalation
 
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