The Metasploit Project, nmap, nessus, Cain & Abel, Ettercap, and niktu are among the tools with the most potential for damage. Security experts say the only way to protect yourself against an open source security tool gone bad is to run it regularly yourself. “The best defense is to use these tools,” says Network Security Services’ Tony Howlett. “Run these tools against your network so you can see what others [could] see””]
Source: https://www.darkreading.com/analytics/when-open-source-security-turns-on-you