Ansible before version 2.2.0 fails to properly sanitize fact variables sent from the Ansible controller. An attacker with the ability to create special variables on the controller could execute arbitrary commands on Ansible clients as the user Ansible runs as.
www.securityfocus.com/bid/94109
access.redhat.com/errata/RHSA-2016:2778
bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8628
github.com/advisories/GHSA-jg4f-jqm5-4mgq
github.com/ansible/ansible
github.com/ansible/ansible/commit/35938b907dfcd1106ca40b794f0db446bdb8cf09
github.com/ansible/ansible/issues/41903
nvd.nist.gov/vuln/detail/CVE-2016-8628