Directory Traversal Vulnerability in TurboFTP Server

Type securityvulns
Reporter Securityvulns
Modified 2010-08-14T00:00:00


Vulnerability ID: HTB22514 Reference: Product: TurboFTP Server Vendor: TurboSoft, Inc ( ) Vulnerable Version: 1.20 Build 745 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 (

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

The FTP Server does not properly sanitise filenames containing directory traversal sequences that are received from an FTP client, for example you can upload any file and rename it to "..\..\..\..\..\..\..\..\..\...Documents and Settings\All Users\Start Menu\Programs\Startup\file.exe", rename command will move specified file into the autorun folder.

Using files with backslash directory traversal sequences in their filenames, an attacker can potentially write files into a server's Startup folder to execute malicious code when the server is restarted. Attacker can also delete any file or folder on Windows file system with vulnerable Turbo FTP server.