Open-FTPD Authentication Bypass Vulnerability

This host is running Open&Compact FTP Server (Open-FTPD) and is prone to authentication bypass vulnerability.
Successful exploitation will allow attackers to bypass certain security restrictions and execute FTP commands without any authentication. Impact Level: Application
No solution or patch was made available for at least one year since disclosure of this vulnerability. Likely none will be provided anymore. General solution options are to upgrade to a newer release, disable respective features, remove the product or replace the product by another one.
The flaw is due to access not being restricted to various FTP commands before a user is properly authenticated. This can be exploited to execute FTP commands without any authentication.
Open&Compact FTP Server (Open-FTPD) Version 1.2 and prior.