AOL Nullsoft Winamp Lyrics3 heap buffer overflow.

AOL Nullsoft Winamp contains a heap based buffer overflow in the code that handles Lyrics3 tags. This vulnerability may allow a remote, unauthenticated attacker execute arbitrary code on a vulnerable system.
Lyrics3 is a system for embedding the lyrics inside an MP3 song file. AOL Nullsoft Winamp fails to properly handle malformed Lyrics3 tags allowing a heap based buffer overflow to occur.
This vulnerability may be triggered by persuading a user to access a specially crafted playlist file or connect to a malicious server with Winamp

Impact

A remote, unauthenticated attacker execute arbitrary code on a vulnerable system.

Fix IT

Upgrade

This vulnerability is addressed in AOL Nullsoft Winamp version 3.51.

Until it is possible to upgrade to AOL Nullsoft Winamp version 3.51, the following workarounds will help reduce the chances of exploitation:

Disable Winamp playlist file association

Disable the file association for Winamp playlist files to help prevent Windows applications from using Winamp to open playlists. This can be accomplished by deleting the following registry key:

HKEY_CLASSES_ROOT\Winamp.Playlist

Disable Shoutcast and Ultravox protocols

Links to malicious playlist files may be accessed using the Shoutcast (shout:) or Ultravox (uvox:) protocols. Disabling these protocols will reduce the chances of exploitation. This can be accomplished by deleting the following registry keys:

HKEY_CLASSES_ROOT\ICY
HKEY_CLASSES_ROOT\SC
HKEY_CLASSES_ROOT\SHOUT
HKEY_CLASSES_ROOT\UVOX

Do not open Winamp playlist files

Do not open Winamp playlist files (.PLS or .M3U) from untrusted sources.

Credit
This vulnerability was reported by iDEFENSE.

This document was written by Jeff Gennari.