From: Secunia Security Advisories (sec-advsecunia.com)
Date: Tue Mar 24 2009 - 15:24:04 CDT

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TITLE:
Telnet-Ftp Service Server Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA34414

VERIFY ADVISORY:
http://secunia.com/advisories/34414/

DESCRIPTION:
Some vulnerabilities have been discovered in Telnet-Ftp Service
Server, which can be exploited by malicious users to bypass certain
security restrictions or cause a DoS (Denial of Service).

1) An input validation error when handling FTP "DELE", "MKD", and
"RMD" requests can be exploited to escape the FTP root and manipulate
arbitrary directories and files on the system via directory traversal
attacks using the "../" character sequence.

2) An error exists in the handling of "RETR" commands. This can be
exploited to crash the service by sending multiple "RETR" requests
with no arguments.

The vulnerabilities are confirmed in version 1.0 build 1.218 trial.
Other versions may also be affected.

SOLUTION:
Grant trusted users access only.

PROVIDED AND/OR DISCOVERED BY:
Jonathan Salwan

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/8273

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