Multiple vulnerabilities have been reported in Webmin, which can be exploited by malicious users to compromise a vulnerable system and by malicious people to bypass certain security restrictions, conduct cross-site request forgery attacks, and disclose certain sensitive information.

1) Input passed via monitor type name is not properly sanitised in edit_mon.cgi and save_mon.cgi. This can be exploited to inject and execute arbitrary Perl code.

2) Input passed via the path info to show.cgi is not properly sanitised before being used in a "open()" function call. This can be exploited to inject and execute arbitrary shell commands.

3) Input passed via the "file" parameter to edit_html.cgi is not properly verified before being used to read files. This can be exploited to read arbitrary files from local resources.

4) The application allows users to perform certain actions via HTTP requests without performing proper validity checks to verify the requests. This can be exploited to e.g. edit monitor type names when a logged-in user visits a specially crafted web page.

5) Input passed via HTTP Referer is not properly verified before being used. This can be exploited to bypass a Referer check via a malicious URL with included port number.

The vulnerabilities are reported in versions prior to 1.600.

Solution
Update to version 1.600.

Provided and/or discovered by
1 - 4) American Information Security Group.
5) The vendor credits Marcin Teodorczyk

Changelog
Further details available to Secunia VIM customers

Original Advisory
Webmin:
http://www.webmin.com/changes.html
http://www.webmin.com/security.html

American Information Security Group:
http://americaninfosec.com/research/dossiers/AISG-12-000.pdf
http://americaninfosec.com/research/dossiers/AISG-12-001.pdf
http://americaninfosec.com/research/dossiers/AISG-12-002.pdf

US-CERT VU#788478:
http://www.kb.cert.org/vuls/id/788478

Other references
Further details available to Secunia VIM customers

Deep Links
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