Software Engineering Institute

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.

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.

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_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX 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.