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.

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.

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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.

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Solution

Upgrade SquirrelMail to version 1.2.4 or later, available from:

<http://www.squirrelmail.org/download.php&gt;

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Vendor Information

153043

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SquirrelMail Project Team __ Affected

Notified: January 28, 2002 Updated: May 30, 2002

Status

Affected

Vendor Statement

“SquirrelMail 1.2.4 is the release that fixed the problem.”

Vendor Information

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

Addendum

Upgrade SquirrelMail to version 1.2.4 or later, available from

<http://www.squirrelmail.org/download.php&gt;

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23153043 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://www.securityfocus.com/bid/3956&gt;
• <http://xforce.iss.net/xforce/xfdb/7989&gt;
• <http://www.squirrelmail.org/&gt;

Acknowledgements

Thanks to Tom McAdam for reporting this vulnerability.

This document was written by Shawn Van Ittersum.

Other Information

CVE IDs:	CVE-2002-1648
Severity Metric:	1.07 Date Public: