Rule:

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Sid:
3692

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Summary:
This event is generated when network traffic that indicates an instant
messaging client is being used.

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Impact:
Possible policy violation.  Instant Messenger programs may not be
appropriate in certain network environments.

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Detailed Information:
This event indicates that the Yahoo IM client is being used on the
protected network.

Specifically a Yahoo Messenger File Transfer Initiation Request was
observed.

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Affected Systems:
	All systems using Yahoo IM client
	
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Attack Scenarios:
It is possible to transfer files between hosts using instant messaging
applications. This may lead to the loss of proprietory and confidential
material.

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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:
Disallow the use of IM clients on the protected network and enforce or
implement an organization wide policy on the use of IM clients.

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Contributors:
Sourcefire Vulnerability Research Team
Alex Kirk <akirk@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>

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Additional References:

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