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Mozilla products allows the src attribute in an img element to be changed to a JavaScript URI

Vulnerability Note VU#405092

Original Release Date: 2007-01-18 | Last Revised: 2007-03-05

Overview

Mozilla products contain a cross-site scripting vulnerability due to a vulnerability in the way IMG elements are loaded.

Description

A vulnerability in the way Mozilla products load IMG elements in a frame may cause a cross-site script injection. According to Mozilla Foundation Security Advisory 2006-72:

... the src attribute of an IMG element loaded in a frame could be changed to a javascript: URI that was able to bypass the protections against cross-site script (XSS) injection. The injected script could steal credentials and financial data, or perform destructive actions on behalf of a logged-in user.

Impact

By convincing a victim to view an HTML document (web page), an attacker could evaluate script in a different security domain than the one containing the attacker's document. The attacker could read or modify data in other web sites (read cookies/content, modify/create content, etc.). If the script is evaluated with chrome privileges, an attacker could execute arbitrary commands on the user's system.

Solution

Apply an update

According to the Mozilla Foundation Security Advisory 2006-72, this vulnerability is addressed in Firefox 2.0.0.1, Firefox 1.5.0.9, Thunderbird 1.5.0.9, and SeaMonkey 1.0.7.

Disable JavaScript


For instructions on how to disable JavaScript in Firefox, please refer to the Firefox section of the Securing Your Web Browser document.

Vendor Information

405092
 
Affected   Unknown   Unaffected

Debian GNU/Linux

Updated:  March 05, 2007

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Refer to DSA-1258-1.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Mozilla

Updated:  December 21, 2006

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Refer to Mozilla Foundation Security Advisory 2006-72.

If you have feedback, comments, or additional information about this vulnerability, please send us email.


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Acknowledgements

This vulnerability was reported in Mozilla Foundation Security Advisory 2006-72. Mozilla credits moz_bug_r_a4 with providing information about this issue.

This document was written by Chris Taschner.

Other Information

CVE IDs: CVE-2006-6503
Severity Metric: 10.26
Date Public: 2006-12-19
Date First Published: 2007-01-18
Date Last Updated: 2007-03-05 18:14 UTC
Document Revision: 25

Sponsored by the Department of Homeland Security Office of Cybersecurity and Communications.