bugtraq - Directory Traversal in FTPGetter

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Date: Sun, 22 Aug 2010 16:35:22 +0200 (CEST)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: Directory Traversal in FTPGetter

Vulnerability ID: HTB22567
Reference: http://www.htbridge.ch/advisory/directory_traversal_in_ftpgetter.html
Product: FTPGetter
Vendor: FTPGetter Team ( http://www.ftpgetter.com/ ) 
Vulnerable Version: 3.51.0.05 and Probably Prior Versions
Vendor Notification: 05 August 2010 
Vulnerability Type: File Content Disclosure
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.