The /usr/sbin/pinger binary packaged with squid in SUSE Linux Enterprise Server 15 before and including version 4.8-5.8.1 and in SUSE Linux Enterprise Server 12 before and including 3.5.21-26.17.1 had squid:root, 0750 permissions. This allowed an attacker that compromissed the squid user to gain persistence by changing the binary
https://bugzilla.suse.com/show_bug.cgi?id=1093414
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00024.html
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.html
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.html