Rule:  

--
Sid:
529

--
Summary:
This event is generated when an attempt is made to issue a Denial of
Service (DoS) attack against a host using the RFPoison tool.

--
Impact:
Serious. Denial of Service.

--
Detailed Information:
The Microsoft Local Security Authority (LSA) service does not handle
certain malformed requests correctly. This service allows for the
manipulation of user privileges on the host. A specially crafted
malformed request sent to the LSA service will cause the system to
become unresponsive.

--
Affected Systems:
	Microsoft Windows NT Workstation
	Microsoft Windows NT Server
	Microsoft Windows NT Terminal Server
	
--
Attack Scenarios:
An attacker can use the RFPoison tool against a host to generate the
request necessary to cause the DoS.

--
Ease of Attack:
Simple.

--
False Positives:
None known.

--
False Negatives:
None known.

--
Corrective Action:
Apply the appropriate vendor supplied patches.

Upgrade to the latest non-affected version of the software.

--
Contributors:
Original Rule Writer Unknown
Sourcefire Research Team
Nigel Houghton <nigel.houghton@sourcefire.com>

-- 
Additional References:

RFP:
http://www.wiretrip.net/rfp/txt/rfp9906.txt

Microsoft:
http://support.microsoft.com/support/kb/articles/Q231/4/57.asp

--
