A flaw was found in sssd Group Policy Objects implementation. When the GPO is not readable by SSSD due to a too strict permission settings on the server side, SSSD will allow all authenticated users to login instead of denying access.
[ { "events": [ { "introduced": "0" }, { "last_affected": "7.0" } ] } ]
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-16838.json"