Turbo FTP 1.20 Build 745 Directory Traversal

Type packetstorm
Reporter High-Tech Bridge SA
Modified 2010-08-03T00:00:00


                                            `Vulnerability ID: HTB22514  
Reference: http://www.htbridge.ch/advisory/directory_traversal_vulnerability_in_turboftp_server.html  
Product: TurboFTP Server  
Vendor: TurboSoft, Inc ( http://turboftp.com/ )   
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 (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 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.