Out of security reasons -- as in most of the other packages -- the suid binaries should be set 4711 to deny read access to non-root. This affects in this package: -rwsr-xr-x 1 root 72055 Jan 3 16:47 /usr/bin/mtr
Created attachment 31775 [details] mtr-0.54-r2 ebuild fixes /usr/bin/mtr permissions (4710) and also sets the owner as root:wheel, just like traceroute.
Note that this package is missing metadata.xml. also, current version is 0.58, but I can't bump it from 0.54-r1 since it contains an ipv6 patch that doesn't apply cleanly. I see there's code to handle ipv6, but since I don't have ipv6 I can't test that out.
I didn't see some IPv6 functionality in mtr-0.58. sixxs.net is a good tunnel broker by the way.
Let's keep 0.54 in the mean time, until mtr gets proper ipv6 (its configure script/doc doesn't mention ipv6, though it looks like the code does have some ipv6 hooks - I forced it to compile ipv6 support with -DENABLE_IPV6, but it's unable to resolve net6_open)
0.54 fixed suid now in portage, Thanks Philipp!