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Secunia Research: Mozilla / Mozilla Firefox Download Dialog Source Spoofing Vulnerability

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                     Secunia Research 04/01/2005

    - Mozilla / Mozilla Firefox Download Dialog Source Spoofing -

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Table of Contents

Affected Software....................................................1
Severity.............................................................2
Description of Vulnerability.........................................3
Solution.............................................................4
Time Table...........................................................5
Credits..............................................................6
About Secunia........................................................7
Verification.........................................................8

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1) Affected Software

Firefox 1.0
Mozilla 1.7.5

Other versions may also be affected.

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2) Severity

Rating: Less critical
Impact: Spoofing
Where:  From remote

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3) Description of Vulnerability

Secunia Research has discovered a vulnerability in Mozilla / Mozilla
Firefox, which can be exploited to spoof the source displayed in the
Download Dialog box.

The problem is that long sub-domains and paths aren't displayed
correctly, which therefore can be exploited to obfuscate what is
being displayed in the source field of the Download Dialog box.

The vulnerability has been confirmed in Mozilla 1.7.3 for Linux,
Mozilla 1.7.5 for Windows, and Mozilla Firefox 1.0.

Mozilla Bugzilla report:
https://bugzilla.mozilla.org/show_bug.cgi?id=275417

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4) Solution

Currently, no solution is available. However, the vendor reports
that this vulnerability will be fixed in upcoming versions of the
affected products.

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5) Time Table

24/11/2004 - Vulnerability reported to vendor.
20/12/2004 - The vendor published a public Bugzilla report regarding
             this vulnerability.
04/01/2005 - Public disclosure.

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6) Credits

Discovered by Jakob Balle, Secunia Research.

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7) About Secunia

Secunia collects, validates, assesses, and writes advisories regarding
all the latest software vulnerabilities disclosed to the public. These
advisories are gathered in a publicly available database at the
Secunia web site:

http://secunia.com/

Secunia offers services to our customers enabling them to receive all
relevant vulnerability information to their specific system
configuration.

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/secunia_security_advisories/

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8) Verification

Please verify this advisory by visiting the Secunia web site:
http://secunia.com/secunia_research/2004-15/advisory/

Complete list of vulnerability reports released by Secunia Research:
http://secunia.com/secunia_research/

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