Serv-U FTP Server SITE CHMOD Command Stack Overflow Vulnerability

The remote host is running Serv-U FTP server. There is a bug in the way this server handles arguments to the SITE CHMOD requests which may allow an attacker to trigger a buffer overflow against this server, which may allow him to disable this server remotely or to execute arbitrary code on this host.
Upgrade to Serv-U FTP Server version 4.2 or later.