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OmniWeb IDN Spoofing Security Issue Advisory Available in Danish 

Secunia Advisory: SA14166  
Release Date: 2005-02-07
Last Update: 2005-07-25

Critical:
Moderately critical
Impact: Spoofing
Where: From remote
Solution Status: Vendor Patch

Software:OmniWeb 5.x

CVE reference:CVE-2005-0236 (Secunia mirror)

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Description:
Eric Johanson has reported a security issue in OmniWeb, 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 OmniWeb versions 5.1. Other versions may also be affected.

Solution:
Update to version 5.1.1.

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

Reported by:
Eric Johanson

Changelog:
2005-02-10: Added CVE reference.
2005-07-25: Updated "Solution" section.

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

Other References:
The Homograph Attack:
http://www.cs.technion.ac.il/~gabr/papers/homograph.html

ICANN paper on IDN Permissible Code Point Problems:
http://www.icann.org/committees/idn/idn-codepoint-paper.htm



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

4 Related Secunia Security Advisories

1. OmniWeb "alert()" Format String Vulnerability
2. OmniWeb Local Domain Arbitrary Code Execution Vulnerability
3. OmniWeb Window Injection Vulnerability
4. OmniWeb Dialog Spoofing Vulnerability


Send Feedback to Secunia

If you have new information regarding this Secunia advisory or a product in our database, please send it to us using either our web form or email us at vuln@secunia.com.

Ideas, suggestions, and other feedback are most welcome.








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