An issue was discovered in Midnight Commander through 4.8.26. When establishing an SFTP connection, the fingerprint of the server is neither checked nor displayed. As a result, a user connects to the server without the ability to verify its authenticity.
Weakness
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Midnight_commander | Midnight-commander | * | 4.8.26 (including) |
| Mc | Ubuntu | bionic | * |
| Mc | Ubuntu | esm-apps/bionic | * |
| Mc | Ubuntu | esm-apps/focal | * |
| Mc | Ubuntu | esm-apps/jammy | * |
| Mc | Ubuntu | esm-apps/xenial | * |
| Mc | Ubuntu | esm-infra-legacy/trusty | * |
| Mc | Ubuntu | focal | * |
| Mc | Ubuntu | hirsute | * |
| Mc | Ubuntu | impish | * |
| Mc | Ubuntu | jammy | * |
| Mc | Ubuntu | trusty | * |
| Mc | Ubuntu | trusty/esm | * |
| Mc | Ubuntu | upstream | * |
| Mc | Ubuntu | xenial | * |
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/114.html
- https://cwe.mitre.org/data/definitions/115.html
- https://cwe.mitre.org/data/definitions/151.html
- https://cwe.mitre.org/data/definitions/194.html
- https://cwe.mitre.org/data/definitions/22.html
- https://cwe.mitre.org/data/definitions/57.html
- https://cwe.mitre.org/data/definitions/593.html
- https://cwe.mitre.org/data/definitions/633.html
- https://cwe.mitre.org/data/definitions/650.html
- https://cwe.mitre.org/data/definitions/94.html
References
- https://docs.ssh-mitm.at/CVE-2021-36370.html
- https://github.com/MidnightCommander/mc/blob/5c1d3c55dd15356ec7d079084d904b7b0fd58d3e/src/vfs/sftpfs/connection.c#L484
- https://github.com/MidnightCommander/mc/blob/master/src/vfs/sftpfs/connection.c
- https://mail.gnome.org/archives/mc-devel/2021-August/msg00008.html
- https://midnight-commander.org/
- https://sourceforge.net/projects/mcwin32/files/
- https://docs.ssh-mitm.at/CVE-2021-36370.html
- https://github.com/MidnightCommander/mc/blob/5c1d3c55dd15356ec7d079084d904b7b0fd58d3e/src/vfs/sftpfs/connection.c#L484
- https://github.com/MidnightCommander/mc/blob/master/src/vfs/sftpfs/connection.c
- https://mail.gnome.org/archives/mc-devel/2021-August/msg00008.html
- https://midnight-commander.org/
- https://sourceforge.net/projects/mcwin32/files/