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Apple Mac OS X UFS Denial of Service Vulnerabilities
Secunia Advisory: SA23725
Release Date: 2007-01-12
Last Update: 2007-03-16
Popularity: 9,143 views

Critical:
Not critical
Impact: DoS
Where: From remote
Solution Status: Vendor Patch

OS:Apple Macintosh OS X

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CVE reference:CVE-2007-0299


Description:
LMH has reported some vulnerabilities in Apple Mac OS X, which can be exploited by malicious people to cause a DoS (Denial of Service).

1) An integer overflow error in the "byte_swap_sbin()" function in bsd/ufs/ufs/ufs_byte_order.c can be exploited to cause a kernel panic.

2) An error exists in the "ufs_dirbad()" function when handling corrupted UFS DMG images and can be exploited to cause a kernel panic.

NOTE: These vulnerabilities are only remotely exploitable via the Safari web browser when the "opening safe files after downloading" option is enabled.

The vulnerabilities are reported on Mac OS X 10.4.8 running on a x86 platform. Other versions may also be affected.

Solution:
Update to Mac OS X 10.4.9 or install Security Update 2007-003.
http://docs.info.apple.com/article.html?artnum=305214

Provided and/or discovered by:
LMH

Changelog:
2007-01-16: Updated "Description" section. Added vulnerability #2.
2007-01-19: Added CVE reference.
2007-03-14: Updated "Solution" section.
2007-03-16: Added link to US-CERT.

Original Advisory:
http://projects.info-pull.com/moab/MOAB-11-01-2007.html
http://projects.info-pull.com/moab/MOAB-12-01-2007.html

Other References:
US-CERT VU#515792:
http://www.kb.cert.org/vuls/id/515792


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