The salt-ssh minion code in SaltStack Salt 2016.11 before 2016.11.4 copied over configuration from the Salt Master without adjusting permissions, which might leak credentials to local attackers on configured minions (clients).
https://github.com/saltstack/salt/pull/40609/commits/6e34c2b5e5e849302af7ccd00509929c3809c658
https://github.com/saltstack/salt/pull/40609
https://github.com/saltstack/salt/issues/40075
https://docs.saltstack.com/en/latest/topics/releases/2016.11.4.html