Salt-api in SaltStack Salt before 2015.8.13, 2016.3.x before 2016.3.5, and 2016.11.x before 2016.11.2 allows arbitrary command execution on a salt-master via Salt's ssh_client.
https://docs.saltstack.com/en/latest/topics/releases/2016.11.2.html
https://docs.saltstack.com/en/2016.3/topics/releases/2016.3.5.html
https://docs.saltstack.com/en/2016.3/topics/releases/2015.8.13.html