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Netsikker nu! 2008
 
FreeBSD UFS "ufs_dirbad()" Local Denial of Service
Secunia Advisory: SA23721
Release Date: 2007-01-16
Popularity: 7,921 views

Critical:
Not critical
Impact: DoS
Where: Local system
Solution Status: Unpatched

OS:FreeBSD 6.x

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Description:
LMH has reported a vulnerability in FreeBSD, which can be exploited by malicious, local users to cause a DoS (Denial of Service).

The vulnerability is caused due to an error within the "ufs_dirbad()" function when handling corrupted UFS images and can be exploited to cause a kernel panic.

The vulnerability is reported in FreeBSD 6.1. Other versions may also be affected.

Solution:
Allow only trusted users to mount UFS images.

Provided and/or discovered by:
LMH

Original Advisory:
http://projects.info-pull.com/moab/MOAB-12-01-2007.html


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