GEN:SID 1:2114
Message RSERVICES rexec password overflow attempt
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.
Impact Denial of service by anonymous, remote users.
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.
Affected Systems Pragma Systems TelnetServer 2000
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.
Ease of Attack Simple. An exploit exists.
Corrective Action Upgrade to TelnetServer 2000 build 2 or higher.
Additional References Bugtraq
http://www.securityfocus.com/bid/1605

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