Vulnerability Note VU#153043

SquirrelMail compose.php script does not adequately validate input thereby allowing arbitrary user to send messages

Overview

Some versions of SquirrelMail do not properly validate input. Attackers can spoof email addresses through this vulnerability.

I. Description

SquirrelMail is a collection of PHP4 scripts that provides webmail services. Prior to version 1.24, SquirrelMail does not properly validate Universal Resource Identifiers (URI's) and JavaScript code embedded in HTML tags within an email message. These tags are sent by SquirrelMail to the user's web browser, which could make the browser request the embedded URI's or execute the JavaScript code.

II. Impact

An attacker could craft an email message to a SquirrelMail user which, when read by the user, could automatically send email from the user's account to any address of the attacker's choice. This vulnerability could also be used in a cross-site scripting attack to hijack an authenticated user's session.

III. Solution

Upgrade SquirrelMail to version 1.2.4 or later, available from:

http://www.squirrelmail.org/download.php

Systems Affected

Vendor	Status	Date Notified	Date Updated
SquirrelMail Project Team	Vulnerable	30-May-2002

References

http://www.securityfocus.com/bid/3956
http://xforce.iss.net/xforce/xfdb/7989
http://www.squirrelmail.org/

Credit

Thanks to Tom McAdam for reporting this vulnerability.

This document was written by Shawn Van Ittersum.

Other Information

Date Public:	2002-01-24
Date First Published:	2002-05-30
Date Last Updated:	2007-05-10
CERT Advisory:
CVE-ID(s):	CVE-2002-1648
NVD-ID(s):	CVE-2002-1648
US-CERT Technical Alerts:
Severity Metric:	1.07
Document Revision:	12

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