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.

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.

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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.

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Solution

Apply An Update

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

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Vendor Information

366372

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RSA Security __ Affected

Updated: April 19, 2005

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

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

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23366372 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

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

Acknowledgements

Thanks to Oliver Karow for reporting this vulnerability.

This document was written by Ken MacInnis.

Other Information

CVE IDs:	CVE-2005-1118
Severity Metric:	0.79 Date Public: