Rule:

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Sid:
712

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Summary:
This event is generated when an attempt is made to set an environment
variable in a Telnet session to a server.

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Impact:
Unauthorized superuser access.

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Detailed Information:
This event is generated when an attempt is made to use the environment
variable ld_library_path in a Telnet session.

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Affected Systems:
	Telnet servers.

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Attack Scenarios:
An attacker can attempt to set the environment variable ld_library_path
and then attempt to exploit a known vulnerability in some SunOS based
systems.

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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:
Use ssh as an alternative to Telnet

Block inbound telnet access if it is not required.

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Contributors:
Original Rule Writer Unknown
Sourcefire Research Team
Nigel Houghton <nigel.houghton@sourcefire.com>

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Additional References:

Bugtraq:
http://www.securityfocus.com/bid/43

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