Vulnerability Note VU#366372

RSA Authentication Agent for Web fails to properly validate input

Overview

The RSA Authentication Agent for Web running on Microsoft Internet Information Services (IIS) does not properly validate input that is passed to the "postdata" parameter in "/WebID/IISWebAgentIF.dll" and may allow an attacker to execute code in a user's browser.

I. Description

RSA Authentication Agent for Web for IIS fails to filter HTML from HTTP POST request input in the "postdata" parameter and may allow a cross-site scripting attack. A remote attacker may be able to insert code which will run from the site running RSA Authentication Agent for Web for IIS and be executed on the target user's web browser.

II. Impact

A remote attacker may be able to execute code and script code in a user's browser. The attacker may thus be able to impersonate the target user or read protected cookies and data from the target user's web browser, among other possibilities.

III. Solution

Apply An Update

This issue has been addressed in RSA Authentication Agent for Web for IIS version 5.3.

Systems Affected

Vendor	Status	Date Updated
RSA Security	Vulnerable	19-Apr-2005

References

http://www.oliverkarow.de/research/rsaxss.txt
http://secunia.com/advisories/14954/
http://securitytracker.com/alerts/2005/Apr/1013724.html
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1118

Credit

Thanks to Oliver Karow for reporting this vulnerability.

This document was written by Ken MacInnis.

Other Information

Date Public	04/15/2005
Date First Published	06/07/2005 02:19:40 PM
Date Last Updated	06/07/2005
CERT Advisory
CVE-ID(s)	CAN-2005-1118
NVD-ID(s)	CAN-2005-1118
US-CERT Technical Alerts
Metric	0.79
Document Revision	4

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Produced 2005 by US-CERT, a government organization
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