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                     Secunia Research 21/03/2007

        - XMMS Integer Overflow and Underflow Vulnerabilities -

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Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

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1) Affected Software 

* xmms 1.2.10 (Linux)

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Moderately critical
Impact: System access
Where:  Remote

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3) Vendor's Description of Software 

"XMMS is a multimedia player for unix systems. XMMS stands for X
MultiMedia System and can play media files such as MP3, MOD's, WAV and
others with the use of Input plugins."

Product Link:
http://www.xmms.org 

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4) Description of Vulnerability

Secunia Research has discovered two vulnerabilities in XMMS, which can
be exploited by malicious people to compromise a user's system.

1) An integer underflow error exists in the processing of skin bitmap
images. This can be exploited to cause a stack-based buffer overflow
via specially crafted skin images containing manipulated header
information.

Successful exploitation allows execution of arbitrary code.

2) An integer overflow error exists in the processing of skin bitmap
images. This can be exploited to cause memory corruption via specially
crafted skin images containing manipulated header information.

Successful exploitation may allow the execution of arbitrary code.

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5) Solution 

Do not install skins from untrusted sources.

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6) Time Table 

06/02/2007 - Vendor notified (Red Hat and the vendor-sec list).
06/02/2007 - Vendor response.
21/03/2007 - Public disclosure.

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7) Credits 

Discovered by Sven Krewitt, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
the following CVE identifiers for the vulnerabilities:
* CVE-2007-0653 (integer overflow)
* CVE-2007-0654 (integer underflow)

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9) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://corporate.secunia.com/ 

Secunia also provides a publicly accessible and comprehensive advisory
database as a service to the security community and private 
individuals, who are interested in or concerned about IT-security.

http://secunia.com/ 

Secunia believes that it is important to support the community and to
do active vulnerability research in order to aid improving the 
security and reliability of software in general:

http://corporate.secunia.com/secunia_research/33/ 

Secunia regularly hires new skilled team members. Check the URL below
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http://secunia.com/secunia_vacancies/ 

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/secunia_security_advisories/ 

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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2007-47/ 

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/ 

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