pyftpdlib FTP Server Multiple Vulnerabilities

This host is running pyftpdlib FTP server and is prone to multiple vulnerabilities.
Successful exploitation will allow attacker to cause a denial of service. Impact Level: Application
Upgrade to pyftpdlib version 0.5.2 or later, For updates refer to
- in pyftpdlib does not delay its response after receiving an invalid login attempt, which makes it easier for remote attackers to obtain access via a brute-force attack. - ftp_QUIT function allows remote authenticated users to cause a denial of service by sending a QUIT command during a disallowed data-transfer attempt.
Affected in pyftpdlib before 0.5.0