2114.txt

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Rule:

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Sid:
2114

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Summary:
This event is generated when a remote attacker attempts to send a large number of null characters to port 512 on an internal server. This may indicate an attempt to exploit a buffer overflow condition in Pragma Systems TelnetServer 2000.

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Impact:
Denial of service by anonymous, remote users.

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Detailed Information:
Pragma Systems TelnetServer 2000 contains a vulnerability where a large number of null characters sent to the Telnet server's rexec port can crash the server. 

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Affected Systems:
Pragma Systems TelnetServer 2000

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Attack Scenarios:
A remote attacker can send messages that contain a large number of null characters to the Telnet server, causing the server to crash.

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Ease of Attack:
Simple. An exploit exists.

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False Positives:
None known.

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False Negatives:
None known.

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Corrective Action:
Upgrade to TelnetServer 2000 build 2 or higher.

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Contributors:
Sourcefire Vulnerability Research Team
Brian Caswell <[e-mail]>
Sourcefire Technical Publications Team
Jen Harvey <[e-mail]>

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Additional References:

Bugtraq
http://www.securityfocus.com/bid/1605

CVE
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2000-0708

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