Directory Traversal Vulnerability in TurboFTP 6 Client

[advisory@xxxxxxxxxxx]

Vulnerability ID: HTB22509
Reference: 
http://www.htbridge.ch/advisory/directory_traversal_vulnerability_in_turboftp_6_client.html
Product: TurboFTP 6 Client
Vendor: TurboSoft, Inc ( http://www.turboftp.com/ ) 
Vulnerable Version: 6.30.806 (32 and 64 bit) and Probably Prior Versions
Vendor Notification: 19 July 2010 
Vulnerability Type: Directory Traversal Vulnerability
Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response
Risk level: High 
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing 
(http://www.htbridge.ch/) 

Vulnerability Details:
When exploited, this vulnerability allows an anonymous attacker to write files 
to specified locations on a user's system.

The FTP client does not properly sanitise filenames containing directory 
traversal sequences that are received from an FTP server, for example
file named as "..\..\..\..\..\..\..\somefile.exe".

By tricking a user to download a directory from a malicious FTP server that 
contains files with backslash directory traversal sequences in their filenames, 
an attacker can potentially write files into a user's Startup folder to execute 
malicious code when the user logs on.