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FreeBSD UFS Integer Overflow Vulnerabilities
Secunia Advisory: SA22736
Release Date: 2006-11-06
Last Update: 2006-11-16
Popularity: 9,147 views

Critical:
Less critical
Impact: Privilege escalation
DoS
Where: Local system
Solution Status: Unpatched

OS:FreeBSD 6.x

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CVE reference:CVE-2006-5679
CVE-2006-5824


Description:
LMH has reported some vulnerabilities in FreeBSD, which can be exploited by malicious, local users to cause a DoS (Denial of Service) or gain escalated privileges.

The vulnerabilities are caused due to integer overflows within the "ffs_mountfs()" and "ffs_rdextattr()" functions. This can be exploited to crash the kernel or possibly execute arbitrary code by mounting a specially crafted UFS image.

The vulnerabilities are 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

Changelog:
2006-11-08: Added CVE reference.
2006-11-09: Added vulnerability in the "ffs_rdextattr()" function.
2006-11-16: Added CVE reference.

Original Advisory:
http://projects.info-pull.com/mokb/MOKB-03-11-2006.html
http://projects.info-pull.com/mokb/MOKB-08-11-2006.html


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