Rule:

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Sid:
2540

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Summary:
This event is generated when an attempt is made to exploit a known
vulnerability in the Microsoft implementation of SSL Version 3.

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Impact:
Denial of Service (DoS).

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Detailed Information:
A vulnerability exists in the handling of SSL Version 3 requests that
can be manipulated to cause a DoS condition in various software 
implementations used on Microsoft operating systems.

The condition exists because of poor error handling routines in the
Microsoft Secure Sockets Layer (SSL) library. SSL requests containing an
invalid field, sent to vulnerable systems can cause the affected host to stop 
handling any further requests.

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Affected Systems:
	Microsoft Windows 2000, 2003 and XP systems using SSL

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Attack Scenarios:
An attcker needs to make an SSL request to an affected system that
contains an invalid field.

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Ease of Attack:
Simple.

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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 Research Team
Matt Watchinski <mwatchinski@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>

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Additional References:

US-CERT:
http://www.us-cert.gov/cas/techalerts/TA04-104A.html

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