CVE-2023-3072: HCSEC-2023-20 - Nomad ACL Policies without Label are Applied to Unexpected Resources

HashiCorp Nomad and Nomad Enterprise 0.7.0 up to 1.5.6 and 1.4.10 ACL policies using a block without a label generates unexpected results. Fixed in 1.6.0, 1.5.7, and 1.4.11.