zml.cgi does not adequately validate user input thereby allowing directory traversal

Overview

zml.cgi does not adequately validate user input, allowing for directory traversal out of the web root directory.

Description

The perl script zml.cgi reads and parses a file on the server, executing certain Server Side Include (SSI) directives found in the file. The script accepts a CGI parameter specifying the file that should be read and parsed. The script does not adequately validate this parameter, allowing for directory traversal out of the web root directory.

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Impact

Attackers may read any file readable by 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

764027

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Abe Timmerman Affected

Updated: September 24, 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%23764027 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://www.jero.cc/zml/zml.html&gt;
• <http://www.securityfocus.com/bid/3759&gt;

Acknowledgements

Thanks to Blackshell Security Advisory for reporting this vulnerability.

This document was written by Shawn Van Ittersum.

Other Information

CVE IDs:	CVE-2001-1209
Severity Metric:	1.71 Date Public: