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Moderately critical

Netscape IDN Spoofing Security Issue

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Release Date:  2005-02-07    Last Update:  2005-05-20    Views:  24,434

Secunia Advisory SA14165

Where:

From remote

Impact:

Spoofing

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

No CVE references.

Description


Eric Johanson has reported a security issue in Netscape, which can be exploited by a malicious web site to spoof the URL displayed in the address bar, SSL certificate, and status bar.

The problem is caused due to an unintended result of the IDN (International Domain Name) implementation, which allows using international characters in domain names.

This can be exploited by registering domain names with certain international characters that resembles other commonly used characters, thereby causing the user to believe they are on a trusted site.

Secunia has constructed a test, which can be used to check if your browser is affected by this issue:
http://secunia.com/multiple_browsers_idn_spoofing_test/

The issue has been confirmed in Netscape versions 7.2. Other versions may also be affected.


Solution:
Update to version 8.0.1.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Originally described by:
Evgeniy Gabrilovich and Alex Gontmakher

Reported by:
Eric Johanson

Original Advisory:
http://www.shmoo.com/idn/homograph.txt

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: Netscape IDN Spoofing Security Issue

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