Vulnerability Note VU#181907

Overview

Some versions of My Classifieds contain a directory-traversal vulnerability that allows attackers to overwrite files.

Description

My Classifieds is a Perl CGI script, maintained by Mike Spice, that produces dynamic ad listings on a web server and allows users to edit their ads remotely. Prior to version 1.3, My Classifieds passed the CGI variable "category" to Perl's open() function without checking the variable for tampering by the client user.

Impact

Remote attackers can craft an HTTP request with any path in the "category" variable, allowing the attacker to overwrite any file to which the web server process has access.

Solution

Upgrade to version 1.3 of My Classifieds at: http://www.fuzzymonkey.org/cgi-bin/download.cgi

Systems Affected (Learn More)

Vendor	Status	Date Notified	Date Updated
Mike Spice	Affected	29 Jan 2002	07 Jun 2002

If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group	Score	Vector
Base	N/A	N/A
Temporal	N/A	N/A
Environmental	N/A	N/A

References

• http://www.securityfocus.com/bid/3855
• http://freshmeat.net/projects/myclassifieds/
• http://freshmeat.net/~mikespice/
• http://www.fuzzymonkey.org/perl/

Credit

Thanks to Mike Spice for reporting this vulnerability.

This document was written by Shawn Van Ittersum.

Other Information

• CVE IDs: Unknown
• Date Public: 09 Jan 2002
• Date First Published: 31 Jul 2002
• Date Last Updated: 31 Jul 2002
• Severity Metric: 1.35
• Document Revision: 6