Rule:

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Sid:
1257 

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Summary:
This event is generated when an attempt is made to use WinNuke against a
host.

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Impact:
Serious. Possible Denial of Service (DoS), this can cause a system to 
crash or lose network connectivity

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Detailed Information:
An attacker can send a malformed data packet to and networked host over 
TCP and cause a DoS, loss of network connectivity, or a system crash.

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Affected Systems:
	Windows NT Workstation and Server 4.0
	Windows NT Workstation and Server 3.5.x
	Windows 3.1x
	Windows 95
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Attack Scenarios:
Program is run against a system in an attempt to knock the system off 
the network. 

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Ease of Attack:
Simple. An attacker runs WinNuke and enters an IP address of a target 
system.

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False Positives:
None Known.
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False Negatives:
None Known

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Corrective Action:
Since there is no known fix for several of the affected operating 
systems, SMB traffic should be blocked at the firewall and all TCP 
traffic on ports 139/135 should be dropped.
 
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Contributors:
Sourcefire Research Team
Brian Caswell <bmc@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>
Snort documentation contributed by  Mike Rivett ebiz@rivett.org

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Additional References:

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