Rule:

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Sid:
2956

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Summary:
This event is generated when an attempt is made to exploit a known
vulnerability in Microsoft Network Dynamic Data Exchange (NetDDE)
services.

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Impact:
Serious. Execution of arbitrary code with system level privileges

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Detailed Information:
A vulnerability exists in Microsoft NetDDE that may allow an attacker to
run code of their choosing with system level privileges. A programming
error in the handling of network messages may give an attacker the
opportunity to overflow a fixed length buffer by using a specially
crafted NetDDE message.

This service is not started by default on Microsoft Windows systems, but
this issue can also be exploited locally in an attempt to escalate
privileges after a successful attack from an alternate vector.

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Affected Systems:
	Microsoft Windows NT, 2000, 2003, XP, 98 and ME systems.

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Attack Scenarios:
An attacker needs to craft a special NetDDE message in order to overflow
the affected buffer.

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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

Disable the NetDDE service.

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

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Additional References:

Microsoft Security Bulletin MS04-031:
http://www.microsoft.com/technet/security/bulletin/ms04-031.mspx

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