PGPMail.pl does not adequately validate user input thereby allowing arbitrary command execution

Overview

PGPMail.pl does not adequately filter user input, allowing arbitrary command execution.

Description

PGPMail.pl is an adaptation of the FormMail.pl CGI script, enhanced to use PGP encryption. PGPMail.pl does not adequately filter the “recipient” and “pgpuserid” CGI variables before passing them to piped Perl open() function calls, inevoking shells. As a result, attackers may execute arbitrary commands on the server with privileges of the web server process.

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Impact

Remote attackers can execute arbitrary commands on the server with privileges of the web server process.

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Solution

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

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Vendor Information

453475

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Ventura Blvd Affected

Updated: September 25, 2002

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

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

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23453475 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

<http://www.venturablvd.com/pgpmail/&gt;

Acknowledgements

Thanks to John Scimone for reporting this vulnerability.

This document was written by Shawn Van Ittersum.

Other Information

CVE IDs:	CVE-2001-0937
Severity Metric:	4.28 Date Public: