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Apple Mac OS X UFS ffs_mountfs() Integer Overflow
Secunia Advisory: SA23703
Release Date: 2007-01-11
Last Update: 2007-03-14
Popularity: 17,386 views

Critical:
Highly critical
Impact: DoS
System access
Where: From remote
Solution Status: Vendor Patch

OS:Apple Macintosh OS X

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CVE reference:CVE-2007-0229


Description:
LMH has reported a vulnerability in Mac OS X, which can potentially be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to an integer overflow error in the "ffs_mountfs()" function when handling UFS filesystem disc images. This can be exploited to cause a heap-based buffer overflow via a specially crafted UFS DMG image.

Successful exploitation may allow the execution of arbitrary code.

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

The vulnerability is reported in an updated Mac OS X 10.4.8. 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:
2007-01-17: Added link to US-CERT.
2007-01-17: Added CVE reference.
2007-03-14: Updated "Solution" section.

Original Advisory:
http://projects.info-pull.com/moab/MOAB-10-01-2007.html

Other References:
US-CERT VU#552136:
http://www.kb.cert.org/vuls/id/552136


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