Smallftpd FTP Server Multiple Requests Denial of Service Vulnerability

The host is running Smallftpd FTP Server and is prone to denial of service vulnerability.
Successful exploitation will allow unauthenticated attackers to cause a denial of service. 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 an error when handling the multiple requests from the client. It is unable to handle multiple connections regardless of its maximum connection settings.
Smallftpd version 1.0.3-fix and prior.