Avahi DOS attack broadcast-avahi-dos
Avahi is a commonly used DNS-like service under Linux. It can help hosts discover devices and services based on the Zeroconf protocol in a local area network without DNS service. The tool works on UDP port 5353. Prior to version 0.6.29, the service had a CVE-2011-1002 vulnerability. Nmap's broadcast-avahi-dos script looks for DNS servers on the local network and sends empty UDP packets. If this vulnerability exists, it can cause the server to crash.