Total vulnerabilities in the database
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.
| Software | From | Fixed in |
|---|---|---|
| samba / samba | 4.19.0 | 4.19.1 |
| samba / samba | 4.18.0 | 4.18.8 |
| samba / samba | 4.0.0 | 4.17.12 |