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 =========================== Nullsoft Winamp 5.12 Nullsoft Winamp 5.13 Unaffected systems & software ============================= Nullsoft Winamp 5.2 Summary ========= Winamp is a popular media player that supports various media formats and playlist formats, including m3u and pls formats. NSFocus Security Team discovered a buffer overflow vulnerability when Winamp processes .m3u files, which might cause Winamp to crash or even execute arbitrary code when a user load a malicious .m3u file and play. Description ============ Winamp can play files by loading .m3u file. When the playing is paused or stopped, Winamp will reset the title of the program, where function strncpy() is incorrectly called, resulting in a static buffer overflow. An attacker can cause winamp to crash by crafting a malicious .m3u file. Remote code execution is possible but difficult. Workaround ============= Cancel .m3u file association to Winamp, and do not open untrusted .m3u files. Vendor Status ============== 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 available for download at: http://www.winamp.com/player/ http://forums.winamp.com/showthread.php?threadid=238648 Additional Information ======================== 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 CVE list (http://cve.mitre.org), which standardizes names for security problems. Candidates may change significantly before they become official CVE entries. Acknowledgment =============== Liu Yexin of NSFocus Security Team found the vulnerability. DISCLAIMS ========== THE INFORMATION PROVIDED IS RELEASED BY NSFOCUS "AS IS" WITHOUT WARRANTY OF ANY KIND. NSFOCUS DISCLAIMS ALL WARRANTIES, EITHER EXPRESSED OR IMPLIED, EXCEPT FOR THE WARRANTIES OF MERCHANTABILITY. IN NO EVENT SHALL NSFOCUS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF NSFOCUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. DISTRIBUTION OR REPRODUCTION OF THE INFORMATION IS PROVIDED THAT THE ADVISORY IS NOT MODIFIED IN ANY WAY. Copyright 1999-2006 NSFOCUS. All Rights Reserved. Terms of use. NSFOCUS Security Team <security (at) nsfocus (dot) com [email concealed]> NSFOCUS INFORMATION TECHNOLOGY CO.,LTD (http://www.nsfocus.com)