Rule:  

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Sid:
2203

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Summary:
This event is generated when an attempt is made to access everythingform.cgi on an internal web server. This may indicate an attempt to exploit a remote command execution vulnerability in Leif M. Wright's everythingform.cgi script.

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Impact:
Remote execution of arbitrary code, possibly leading to remote root compromise.

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Detailed Information:
Leif Wright's everythingform.cgi script is a Perl script that processes multiple forms. It contains a parsing vulnerability in a hidden "config" field that enables an attacker to run arbitrary shell commands with the security context of the web server.

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Affected Systems:
Web servers running Leif M. Wright Everythingform.cgi 2.0.
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Attack Scenarios:
An attacker uses a specially crafted value for the config field. Any commands included in the value are executed with the security context of the web server.

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Ease of Attack:
Simple. Exploits exist.

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False Positives:
If a legitimate remote user accesses everythingform.cgi, this rule may generate an event.

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False Negatives:
None known.

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Corrective Action:
Disable everythingform.cgi. 

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Contributors:
Sourcefire Research Team
Brian Caswell <bmc@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>
Sourcefire Technical Publications Team
Jennifer Harvey <jennifer.harvey@sourcefire.com>

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Additional References:
Bugtraq
http://www.securityfocus.com/bid/2101

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