Vulnerability Note VU#575619

Allaire Forums does not verify user information stored in hidden form fields

Overview

Allaire Forums does not verify user information submitted in hidden fields on a web form, allowing attackers to impersonate other users.

I. Description

Allaire Forums is a web-based bulletin board system that runs on Cold Fusion. When a user wishes to post a message, Allaire Forums dynamically generates a web form including the user's name and email address in hidden fields. Attackers may easily change these fields to specify a different user, and Alliare Forums does not check the submission to authenticate the user. Therefore, attackers may post messages to the bulletin board signed by a different user's name and email address.

II. Impact

Malicious users of Allaire Forums may impersonate other users.

III. Solution

The CERT/CC is currently unaware of a practical solution to this problem.

Systems Affected

Vendor	Status	Date Notified	Date Updated
Allaire Corporation	Vulnerable	20-Sep-2002

References

http://www.securityfocus.com/bid/3827

Credit

Thanks to John Cantu for reporting this vulnerability.

This document was written by Shawn Van Ittersum.

Other Information

Date Public:	2002-01-08
Date First Published:	2002-09-26
Date Last Updated:	2002-09-26
CERT Advisory:
CVE-ID(s):
NVD-ID(s):
US-CERT Technical Alerts:
Metric:	0.61
Document Revision:	4

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