Summary
/cgi-bin/.cobalt/overflow/overflow.cgi was detected.
Some versions of this CGI allow remote users to execute arbitrary commands with the privileges of the web server.
*** OVS just checked the presence of this file *** but did not try to exploit the flaw, so this might *** be a false positive
See: http://www.cert.org/advisories/CA-2002-35.html
Solution
get a newer software from Cobalt