Vulnerability Note VU#340860

Yahoo! Music Jukebox Yahoo! MediaGrid ActiveX control stack buffer overflow

Overview

The Yahoo! Music Jukebox Yahoo! MediaGrid ActiveX control contains a stack buffer overflow, which can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

I. Description

Yahoo! Music Jukebox is a music player for Microsoft Windows, which includes multiple ActiveX controls. The Yahoo! MediaGrid ActiveX control, which is provided by mediagridax.dll, contains a stack buffer overflow in the AddBitmap() method.

II. Impact

By convincing a user to view a specially crafted HTML document (e.g., a web page or an HTML email message or attachment), a remote, unauthenticated attacker may be able to execute arbitrary code with the privileges of the user on a vulnerable system.

III. Solution

Apply an update

This vulnerability is addressed in Yahoo! Media Jukebox version 2.2.2.058, which comes with mediagridax.dll version 2.2.2.58. This update may be applied with the automatic update functionality of the Yahoo! Media Jukebox software, or you can install it manually. Please see the Yahoo! Music Jukebox Security Update for more details.

Disable the Yahoo! MediaGrid ActiveX control in Internet Explorer

The vulnerable ActiveX control can be disabled in Internet Explorer by setting the kill bit for the following CLSID:

{22FD7C0A-850C-4A53-9821-0B0915C96139}

More information about how to set the kill bit is available in Microsoft Support Document 240797. Alternatively, the following text can be saved as a .REG file and imported to set the kill bit for this control:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINESOFTWAREMicrosoftInternet ExplorerActiveX Compatibility{22FD7C0A-850C-4A53-9821-0B0915C96139}]
"Compatibility Flags"=dword:00000400

Disable ActiveX

Disabling ActiveX controls in the Internet Zone (or any zone used by an attacker) appears to prevent exploitation of this and other ActiveX vulnerabilities. Instructions for disabling ActiveX in the Internet Zone can be found in the "Securing Your Web Browser" document.

Upgrade to Internet Explorer 7

Upgrading Internet Explorer to version 7 or later may help mitigate this vulnerability through its ActiveX opt-in feature. This feature is designed to prompt the user before using ActiveX controls that are already installed on the system.

Systems Affected

Vendor	Status	Date Updated
Yahoo, Inc.	Vulnerable	13-Feb-2008

References

http://www.cert.org/tech_tips/securing_browser
http://help.yahoo.com/l/us/yahoo/music/jukebox/troubleshoot/securityupdate.html
http://secunia.com/advisories/28757/
http://support.microsoft.com/kb/240797

Credit

This vulnerability was publicly disclosed by Elazar Broad.

This document was written by Will Dormann.

Other Information

Date Public	02/03/2008
Date First Published	02/05/2008 10:54:42 AM
Date Last Updated	02/13/2008
CERT Advisory
CVE Name	CVE-2008-0625
US-CERT Technical Alerts
Metric	21.42
Document Revision	23