Rule: 

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Sid: 
5506

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Summary: 
This event is generated when an attempt is made to exploit a known vulnerability in Microsoft License Logging Service.

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Impact: 
Serious. Execution of arbitrary code leading to unauthorized administrative access to the target host. Denial of Service (DoS) is also possible.

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Detailed Information:
Microsoft License Logging Service is used to manage licenses for Microsoft server products.

A vulnerability in the service exists due to a programming error such that an unchecked buffer may present an attacker with the opportunity to exploit the service and run code of their choosing on an affected system. The attacker may then cause a DoS condition in the service or possibly gain administrative access to the target host.

The unchecked buffer exists when processing the length of messages sent to the logging service.

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Affected Systems:
 Microsoft Windows Server 2003
 Microsoft Windows Server 2000
 Microsoft Windows NT Server

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Attack Scenarios: 
An attacker can supply extra data in the message to the service containing code of their choosing to be run on the server.

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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: 
Apply the appropriate vendor supplied patches.

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Contributors: 
Sourcefire Vulnerability Research Team
Brian Caswell <bmc@sourcefire.com>
Matt Watchinski <matt.watchinski@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>

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Additional References:

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