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Category:   Application (Web Browser)  >   Mozilla Firefox Vendors:
Mozilla Firefox Windows Cursor Image Conversion Heap Overflow Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1017401
SecurityTracker URL:
CVE Reference:   CVE-2006-6500   (Links to External Site)
Date:  Dec 19 2006
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.5 -, 2.0
Description:   A vulnerability was reported in Mozilla Firefox. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create HTML with a specially crafted CSS cursor property setting the cursor to certain images. When the HTML is loaded by the target user, the application incorrectly calculates a size value while converting the image to a Windows bitmap format, triggering a heap overflow and executing arbitrary code. The code will run with the privileges of the target user.

Only Windows-based systems are affected.

Firefox 1.0.x and Mozilla Suite are not affected.

Frederik Reiss reported this vulnerability.

Impact:   A remote user can create HTML that, when loaded by the target user, will execute arbitrary code on the target user's system.
Solution:   The vendor has issued a fixed version ( and

The Mozilla advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Boundary error
Underlying OS:  Windows (Any)

Message History:   None.

 Source Message Contents

[Original Message Not Available for Viewing]

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