Rule:

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Sid:
1364

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Summary:
Attempted lsof command access via web

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Impact:
Attempt to gain information on system processes on webserver

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Detailed Information:
This is an attempt to gain intelligence on the processes being run on a webserver. The lsof command lists information about files that are open by the running processes.  An open file may be a regular file, a directory, a block special file, a character special file, an executing text reference, a library, a stream or a network file (Internet socket, NFS file or Unix domain socket). The attacker could possibly gain information needed for other attacks on the system.

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Attack Scenarios:
The attacker can make a standard HTTP request that contains 'lsof' in the URI.

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Ease of Attack:
Simple HTTP request.

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False Positives:
None Known

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False Negatives:
None Known

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Corrective Action:

Webservers should not be allowed to view or execute files and binaries outside of it's designated web root or cgi-bin. This command may also be requested on a command line should the attacker gain access to the machine.

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Contributors:
Sourcefire Research Team

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Additional References:
sid: 1329
man lsof

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