Ricoh DC Software DL-10 FTP Server 'USER' Command Buffer Overflow Vulnerability

This host is running Ricoh DC Software DL-10 FTP Server and is prone to buffer overflow vulnerability.
Successful exploitation may allow remote attackers to execute arbitrary code within the context of the affected application. Failed exploit attempts will result in a denial-of-service condition. Impact Level: System/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 caused by improper bounds checking by the FTP server when processing malicious FTP commands. This can be exploited to cause a stack-based buffer overflow via an overly long 'USER' FTP command.
Ricoh DC Software DL-10 version