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Category:   Application (Web Browser)  >   Mozilla Firefox Vendors:
Mozilla Firefox JavaScript URI in IMG SRC Attribute Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1017726
SecurityTracker URL:
CVE Reference:   CVE-2007-0994   (Links to External Site)
Date:  Mar 6 2007
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): and
Description:   Two vulnerabilities were 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 that sets the src attribute of an IMG tag to a specially crafted javascript: URI that, when loaded by the target user, will execute arbitrary code on the target system. The code will run with the privileges of the target user.

This vulnerability was introduced in and

moz_bug_r_a4 reported this vulnerability.

The browser allows javascript: URIs in IMG tags to be executed even if JavaScript execution is disabled in the global preferences.

moz_bug_r_a4 and Anbo Motohiko independently reported this vulnerability.

Thunderbird is not affected.

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 fix (,

The Mozilla advisory is available at:

Vendor URL: (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.

 Source Message Contents

[Original Message Not Available for Viewing]

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