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Telnet - Ftp Server Two Vulnerabilities
Secunia Advisory: SA22921
Release Date: 2006-11-29
Last Update: 2006-12-04
Popularity: 5,832 views

Critical:
Less critical
Impact: Exposure of sensitive information
DoS
Where: From remote
Solution Status: Unpatched

Software:Telnet - FTP Server 1.x

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CVE reference:CVE-2006-6240
CVE-2006-6241


Description:
Parvez Anwar has discovered a vulnerability in Telnet - FTP Server, which can be exploited by malicious users to gain access to sensitive information or cause a DoS (Denial of Service).

1) An input validation error in various commands (e.g. GET and PUT) can be exploited to list and download arbitrary files outside of the FTP root via directory traversal attacks.

2) An error in the handling of the "RETR" command can be exploited to crash the service by sending two successive RETR commands.

The vulnerabilities are confirmed in version 1.0 (build 1.250). Other versions may also be affected.

Solution:
Grant access to trusted users only.

Provided and/or discovered by:
Parvez Anwar

Changelog:
2006-12-04: Added CVE reference.


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