A design flaw was found in Samba's DirSync control implementation, which exposes passwords and secrets in Active Directory to privileged users and Read-Only Domain Controllers (RODCs). This flaw allows RODCs and users possessing the GET_CHANGES right to access all attributes, including sensitive secrets and passwords. Even in a default setup, RODC DC accounts, which should only replicate some passwords, can gain access to all domain secrets, including the vital krbtgt, effectively eliminating the RODC / DC distinction. Furthermore, the vulnerability fails to account for error conditions (fail open), like out-of-memory situations, potentially granting access to secret attributes, even under low-privileged attacker influence.

Red Hat, Inc. AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Red Hat, Inc. CWE-200

Red Hat, Inc. https://access.redhat.com/security/cve/CVE-2023-4154 [No types assigned]

Red Hat, Inc. https://bugzilla.redhat.com/show_bug.cgi?id=2241883 [No types assigned]

Red Hat, Inc. https://bugzilla.samba.org/show_bug.cgi?id=15424 [No types assigned]

Red Hat, Inc. https://www.samba.org/samba/security/CVE-2023-4154.html [No types assigned]