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                     Secunia Research 05/02/2010

            - libmikmod Module Parsing 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 

* libmikmod 3.1.12

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Highly critical
Impact: System access
Where:  From remote

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3) Vendor's Description of Software 

"Mikmod is a module player and library supporting many formats,
including mod, s3m, it, and xm.".

Product Link:
http://sourceforge.net/projects/mikmod/

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4) Description of Vulnerability

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

1) Three boundary errors in the Impulse Tracker parser when parsing 
an instrument containing a column, panning, or pitch envelope with 
more than ENVPOINTS (32) points can result in a heap-based buffer 
overflow.

2) A boundary error in the Ultratracker parser when parsing a file 
with more than UF_MAXCHAN (64) channels can result in a heap-based 
buffer overflow.

Successful exploitation may allow arbitrary code execution in the
context of the process using the libmikmod library when opening a
specially crafted module file.

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5) Solution 

Fixed in the CVS repository.

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6) Time Table 

29/12/2009 - Vendor notified.
03/02/2010 - Vendor notified (2nd attempt).
03/02/2010 - Vendor responds that vulnerabilities are fixed in CVS.
05/02/2010 - Public disclosure.

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7) Credits 

Discovered by Dyon Balding, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2009-3995 for the Impulse Tracker vulnerabilities and 
CVE-2009-3996 for the Ultratracker vulnerability.

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9) About Secunia

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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2009-55/

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

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