Rule:

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Sid:
974

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Summary:
This event is generated when an attempt is made to peform a denial of service against Internet Information Service (IIS) 1.0 hosts. 

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Impact:
Denial of service.  This attack may cause an IIS 1.0 server to crash.

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Detailed Information:
IIS 1.0 servers are vulnerable to a denial of service attack when a malformed request containing "..\.." is sent to the server.  The service must be restarted to restore functionality.

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Affected Systems:
IIS 1.0 Servers

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Attack Scenarios:
An attacker can send a malformed request to a vulnerable IIS server to cause a denial of service. 

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Ease of Attack:
Simple.  Send a request similar to this:  GET ..\.. 

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False Positives:
None Known.

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False Negatives:
None Known.

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Corrective Action:
Upgrade to a more current version of IIS.
 
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Contributors:
Original rule writer unknown
Modified by Brian Caswell <bmc@sourcefire.com>
Sourcefire Vulnerability Research Team
Judy Novak <judy.novak@sourcefire.com>

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Additional References:

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