Rule:

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Sid:
505

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Summary:
This event is generated when an attempt is made to login to a Timbuktu server using an unencrypted link.

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Impact:
Serious. Unauthorized access to the server.

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Detailed information:
Looks at the initial hex code of a Timbuktu client login and captures the login and password  combination. 

This is a poor security practice over the open internet and on untrusted network links. This is a  Timbuktu login going over plaintext to the Timbuktu server.

That means that anyone sniffing the wire can now use the login and password used to gain access to  the Timbuktu server.

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Affected Systems:
	Windows all versions
	Mac OS 7.5.3 and later

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Attack Scenario:
An attacker can use a sniffer to gain the user login credentials and use the information to gain unauthorized access to the machine.

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Ease of Attack:
Simple.

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False Positives:
None known

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False Negatives:
Timbuktu may use a port other than 1417 

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Corrective Action:
Use Timbuktu over encrypted links or only on local LANs

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Contributors:
Original Rule Writer Unknown
Sourcefire Research Team
Nigel Houghton <nigel.houghton@sourcefire.com>
Snort documentation contributed by Jake Babbin 

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References: 

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