The MS-SAMR and MS-LSAD protocol implementations in Samba 3.x and 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 mishandle DCERPC connections, which allows man-in-the-middle attackers to perform protocol-downgrade attacks and impersonate users by modifying the client-server data stream, aka BADLOCK.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Samba | Samba | 3.6.0 (including) | 4.2.10 (excluding) |
| Samba | Samba | 4.3.0 (including) | 4.3.7 (excluding) |
| Samba | Samba | 4.4.0 (including) | 4.4.1 (excluding) |