Vulnerability Note VU#107998

MailPost vulnerable to cross-site scripting in the 'append' variable passed to the file as part of an HTTP GET request

Overview

A cross-site scripting vulnerability is reported to exist in MailPost version 5.1.1sv and possibly earlier versions.

I. Description

According to a report by ProCheckUp, MailPost is vulnerable to a Cross-Site Scripting attack via the 'append' variable. The 'append variable is passed as part of an HTTP GET request when the debug mode is enabled. In debug mode, the variables passed to the script are echoed to the screen without any filtering. Note that debug mode is enabled in the default configuration file.

II. Impact

The victim site may present malicious content to their visitors. This could be used to "sniff" sensitive data from within the web page and cookie files, including passwords, credit card numbers, and any arbitrary information the user inputs.

III. Solution

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

Until a resolution can be applied it may be possible to mitigate this vulnerability by disabling debug mode.

Systems Affected

Vendor	Status	Date Updated
MailPost	Vulnerable	3-Nov-2004

References

http://www.procheckup.com/security_info/vuln_pr0410.html

Credit

Thanks to ProCheckUp for reporting this vulnerability.

This document was written by Jason A Rafail and is based on information provided by ProCheckUp.

Other Information

Date Public	11/03/2004
Date First Published	11/03/2004 11:34:11 AM
Date Last Updated	11/03/2004
CERT Advisory
CVE Name
Metric	14.85
Document Revision	3

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