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Moderately critical

Mozilla / Mozilla Firefox "onunload" SSL Certificate Spoofing

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Release Date:  2004-07-26    Last Update:  2004-08-05    Views:  41,353

Secunia Advisory SA12160

Where:

From remote

Impact:

Spoofing

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Emmanouel Kellinis has reported a vulnerability in Mozilla and Mozilla Firefox, allowing malicious sites to abuse SSL certificates of other sites.

It is possible to make the browser load a valid certificate from a trusted website by using a specially crafted "onunload" event. The problem is that Mozilla loads the certificate from a trusted website and shows the "secure padlock" while actually displaying the content of the malicious website.

The URL shown in the address bar correctly reads that of the malicious website.

This has been confirmed using Mozilla Firefox 0.9.2 and Mozilla 1.7.1 on Windows and Mozilla Firefox 0.9.1 on Linux. Other versions may also be affected.


Solution:
The vulnerability has been fixed in the following versions:

Further details available to Secunia VIM customers

Provided and/or discovered by:
Emmanouel Kellinis

Original Advisory:
Emmanouel Kellinis:
http://www.cipher.org.uk/index.php?p=advisories/Certificate_Spoofing_Mozilla_FireFox_25-07-2004.advisory

Mozilla Bug Tracking System:
http://bugzilla.mozilla.org/show_bug.cgi?id=253121

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Mozilla / Mozilla Firefox "onunload" SSL Certificate Spoofing

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