NSFOCUS SA2006-01 : Winamp m3u File Processing Buffer Overflow Vulnerability

[NSFOCUS Security Team]

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NSFOCUS Security Advisory (SA2006-01)

Winamp m3u File Processing Buffer Overflow Vulnerability

Release Date: 2006-02-23

CVE ID: CVE-2006-0720

http://www.nsfocus.com/english/homepage/research/0601.htm

Affected systems & software
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=3D=3D

Nullsoft Winamp 5.12
Nullsoft Winamp 5.13

Unaffected systems & software
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=3D=3D=3D=3D

Nullsoft Winamp 5.2

Summary
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Winamp is a popular media player that supports various media formats and=20
playlist formats, including m3u and pls formats.

NSFocus Security Team discovered a buffer overflow vulnerability when Winam=
p=20
processes .m3u files, which might cause Winamp to crash or even execute=20
arbitrary code when a user load a malicious .m3u file and play.=20

Description
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Winamp can play files by loading .m3u file. When the playing is paused or s=
topped,
Winamp will reset the title of the program, where function strncpy() is inc=
orrectly
called, resulting in a static buffer overflow.

An attacker can cause winamp to crash by crafting a malicious .m3u file.=20
Remote code execution is possible but difficult.

Workaround
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Cancel .m3u file association to Winamp, and do not open untrusted .m3u file=
s.=20

Vendor Status
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2006.02.13 Informed the vendor.
2006.02.15 The vendor confirmed the vulnerability.
2006.02.21 The vendor releases a new version to fix the vulnerability.

The vendor has released Winamp 5.2 to fix this vulnerability, which is avai=
lable=20
for download at:
http://www.winamp.com/player/
http://forums.winamp.com/showthread.php?threadid=3D238648

Additional Information
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The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2006-0720 to this issue. This is a candidate for inclusion in the=
=20
CVE list (http://cve.mitre.org), which standardizes names for security prob=
lems.
Candidates may change significantly before they become official CVE entries.

Acknowledgment
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Liu Yexin of NSFocus Security Team found the vulnerability.

DISCLAIMS
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Copyright 1999-2006 NSFOCUS. All Rights Reserved. Terms of use.


NSFOCUS Security Team <security@nsfocus.com>
NSFOCUS INFORMATION TECHNOLOGY CO.,LTD
(http://www.nsfocus.com)

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