The SMB1 protocol implementation in Samba 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 does not recognize the server signing = mandatory setting, which allows man-in-the-middle attackers to spoof SMB servers by modifying the client-server data stream.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Samba | Samba | 4.0.0 (including) | 4.0.0 (including) |
| Samba | Samba | 4.0.1 (including) | 4.0.1 (including) |
| Samba | Samba | 4.0.2 (including) | 4.0.2 (including) |
| Samba | Samba | 4.0.3 (including) | 4.0.3 (including) |
| Samba | Samba | 4.0.4 (including) | 4.0.4 (including) |
| Samba | Samba | 4.0.5 (including) | 4.0.5 (including) |
| Samba | Samba | 4.0.6 (including) | 4.0.6 (including) |
| Samba | Samba | 4.0.7 (including) | 4.0.7 (including) |
| Samba | Samba | 4.0.8 (including) | 4.0.8 (including) |
| Samba | Samba | 4.0.9 (including) | 4.0.9 (including) |
| Samba | Samba | 4.0.10 (including) | 4.0.10 (including) |
| Samba | Samba | 4.0.11 (including) | 4.0.11 (including) |
| Samba | Samba | 4.0.12 (including) | 4.0.12 (including) |
| Samba | Samba | 4.0.13 (including) | 4.0.13 (including) |
| Samba | Samba | 4.0.14 (including) | 4.0.14 (including) |
| Samba | Samba | 4.0.15 (including) | 4.0.15 (including) |
| Samba | Samba | 4.0.16 (including) | 4.0.16 (including) |
| Samba | Samba | 4.0.17 (including) | 4.0.17 (including) |
| Samba | Samba | 4.0.18 (including) | 4.0.18 (including) |
| Samba | Samba | 4.0.19 (including) | 4.0.19 (including) |
| Samba | Samba | 4.0.20 (including) | 4.0.20 (including) |
| Samba | Samba | 4.0.21 (including) | 4.0.21 (including) |
| Samba | Samba | 4.0.22 (including) | 4.0.22 (including) |
| Samba | Samba | 4.0.23 (including) | 4.0.23 (including) |
| Samba | Samba | 4.0.24 (including) | 4.0.24 (including) |
| Samba | Samba | 4.0.25 (including) | 4.0.25 (including) |
| Samba | Samba | 4.0.26 (including) | 4.0.26 (including) |
| Samba | Samba | 4.1.0 (including) | 4.1.0 (including) |
| Samba | Samba | 4.1.1 (including) | 4.1.1 (including) |
| Samba | Samba | 4.1.2 (including) | 4.1.2 (including) |
| Samba | Samba | 4.1.3 (including) | 4.1.3 (including) |
| Samba | Samba | 4.1.4 (including) | 4.1.4 (including) |
| Samba | Samba | 4.1.5 (including) | 4.1.5 (including) |
| Samba | Samba | 4.1.6 (including) | 4.1.6 (including) |
| Samba | Samba | 4.1.7 (including) | 4.1.7 (including) |
| Samba | Samba | 4.1.8 (including) | 4.1.8 (including) |
| Samba | Samba | 4.1.9 (including) | 4.1.9 (including) |
| Samba | Samba | 4.1.10 (including) | 4.1.10 (including) |
| Samba | Samba | 4.1.11 (including) | 4.1.11 (including) |
| Samba | Samba | 4.1.12 (including) | 4.1.12 (including) |
| Samba | Samba | 4.1.13 (including) | 4.1.13 (including) |
| Samba | Samba | 4.1.14 (including) | 4.1.14 (including) |
| Samba | Samba | 4.1.15 (including) | 4.1.15 (including) |
| Samba | Samba | 4.1.16 (including) | 4.1.16 (including) |
| Samba | Samba | 4.1.17 (including) | 4.1.17 (including) |
| Samba | Samba | 4.1.18 (including) | 4.1.18 (including) |
| Samba | Samba | 4.1.19 (including) | 4.1.19 (including) |
| Samba | Samba | 4.1.20 (including) | 4.1.20 (including) |
| Samba | Samba | 4.1.21 (including) | 4.1.21 (including) |
| Samba | Samba | 4.1.22 (including) | 4.1.22 (including) |
| Samba | Samba | 4.1.23 (including) | 4.1.23 (including) |
| Samba | Samba | 4.2.0-rc1 (including) | 4.2.0-rc1 (including) |
| Samba | Samba | 4.2.0-rc2 (including) | 4.2.0-rc2 (including) |
| Samba | Samba | 4.2.0-rc3 (including) | 4.2.0-rc3 (including) |
| Samba | Samba | 4.2.0-rc4 (including) | 4.2.0-rc4 (including) |
| Samba | Samba | 4.2.1 (including) | 4.2.1 (including) |
| Samba | Samba | 4.2.2 (including) | 4.2.2 (including) |
| Samba | Samba | 4.2.3 (including) | 4.2.3 (including) |
| Samba | Samba | 4.2.4 (including) | 4.2.4 (including) |
| Samba | Samba | 4.2.5 (including) | 4.2.5 (including) |
| Samba | Samba | 4.2.6 (including) | 4.2.6 (including) |
| Samba | Samba | 4.2.7 (including) | 4.2.7 (including) |
| Samba | Samba | 4.2.8 (including) | 4.2.8 (including) |
| Samba | Samba | 4.2.9 (including) | 4.2.9 (including) |
| Samba | Samba | 4.3.0 (including) | 4.3.0 (including) |
| Samba | Samba | 4.3.1 (including) | 4.3.1 (including) |
| Samba | Samba | 4.3.2 (including) | 4.3.2 (including) |
| Samba | Samba | 4.3.3 (including) | 4.3.3 (including) |
| Samba | Samba | 4.3.4 (including) | 4.3.4 (including) |
| Samba | Samba | 4.3.5 (including) | 4.3.5 (including) |
| Samba | Samba | 4.3.6 (including) | 4.3.6 (including) |
| Samba | Samba | 4.4.0 (including) | 4.4.0 (including) |