cgi.rb

Summary
The 'cgi.rb' CGI is installed. Some versions is vulnerable to remote denial of service. By sending a specially crafted HTTP POST request, a malicious user can force the remote host to consume a large amount of CPU ressources. *** Warning : OVS solely relied on the presence of this CGI, it did not *** determine if you specific version is vulnerable to that problem
Solution
Verify that your version is at least 1.8.1 or later