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Microsoft Internet Explorer vulnerable to address bar spoofing on double byte character set systems

Vulnerability Note VU#431576

Original Release Date: 2004-10-13 | Last Revised: 2004-10-18

Overview

Microsoft Internet Explorer contains a vulnerability in how it processes URLs on Double Byte Character Set (DBCS) systems. This could allow an attacker to spoof the address of a web site.

Description

Microsoft Internet Explorer contains a canonicalization error when it parses special characters in a URL on a DBCS system. A DBCS system represents characters with either a single byte or a double byte code. DBCS is used with some Asian versions of Microsoft Windows. Because of the error in how IE parses URLs on DBCS systems, a web site operator could make it appear that the content from his or her web site actually originated from another site.

Impact

By making a malicious web site appear to be a site that the user trusts, an attacker could convince the user to provide sensitive information.

Solution

Apply a patch

Apply the patch referenced in MS04-038.

Vendor Information

431576
 
Affected   Unknown   Unaffected

Microsoft Corporation

Updated:  October 13, 2004

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

Please see http://www.microsoft.com/technet/security/bulletin/ms04-038.mspx

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

Thanks to Microsoft for reporting this vulnerability.

This document was written by Will Dormann, based on the information provided in the Microsoft Security Bulletin.

Other Information

CVE IDs: CVE-2004-0844
Severity Metric: 1.98
Date Public: 2004-10-12
Date First Published: 2004-10-13
Date Last Updated: 2004-10-18 16:39 UTC
Document Revision: 7

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