Rule: 

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Sid: 
4988

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Summary: 
This event is generated when an attempt is made to perform a directory traversal attack against a system running Barracuda Spam Firewall.

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Impact: 
Serious. Unauthorized remote command execution possibly leading to remote access.

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Detailed Information:
User supplied data to script parameters are not properly sanitized, this may permit an unauthorized attacker to execute commands of their choosing on an affected system.

Note:
In order to utilize this rule, port 8000 must be added to the http_inspect configuration in snort.conf.

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Affected Systems:
Barracuda Spam Firewall 3.1.17 and prior.

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Attack Scenarios: 
An attacker can supply commands as parameters to the img.pl script.

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Ease of Attack: 
Simple, exploit software exists but is not necessary.

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False Positives:
None known.

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False Negatives:
None known

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Corrective Action: 
Upgrade to the latest non-affected version of the software.

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Contributors:
Sourcefire Vulnerability Research Team
Judy Novak <judy.novak@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>

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Additional References:

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