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TITLE:
FreeBSD UFS "ufs_dirbad()" Local Denial of Service

SECUNIA ADVISORY ID:
SA23721

VERIFY ADVISORY:
http://secunia.com/advisories/23721/

CRITICAL:
Not critical

IMPACT:
DoS

WHERE:
Local system

OPERATING SYSTEM:
FreeBSD 6.x
http://secunia.com/product/6778/

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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