Rule:

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Sid:

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Summary:
This detects traffic generated by a particular udp script installed on the serve
r; this script is usually remotely installed via exploitable software.

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Impact:
The machine sending this traffic is potentially compromised.

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Detailed Information:
This rule detects traffic generated by a the "udp.pl" script installed on the se
rver; this script is usually remotely installed via exploitable software.

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Affected Systems:
Any running vulnerable PHP programs.

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Attack Scenarios:
The udp.pl script is typically installed on a server through php fopen allowing 
remote files to be downloaded/executed on the server side; files are normally ow
ned by the web server user.

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Ease of Attack:
Simple. Exploits exist.

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False Positives:
None known.

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False Negatives:
None known.

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Corrective Action:
Examine the system in question for signs of a successful intrusion, including th
e presence of a script named "udp.pl". If detected, restore the system from the 
last known-good backup.

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Contributors:
Sourcefire Vulnerability Research Team
Sago Networks
Dan Protich <dprotich@sagonet.com>

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Additional References:

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