Detections
Analytics
APPL-12-000054 - The macOS system must implement approved ciphers within the SSH server configuration to protect the confidentiality of SSH connections.
Information
Operating systems using encryption are required to use FIPS-compliant mechanisms for authenticating to macOS.For OpenSSH to utilize the Apple Corecrypto FIPS-validated algorithms, a specific configuration is required to leverage the shim implemented by macOS to bypass the non-FIPS-validated LibreSSL crypto module packaged with OpenSSH. Information regarding this configuration can be found in the manual page 'apple_ssh_and_fips'.
Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000120-GPOS-00061, SRG-OS-000125-GPOS-00065, SRG-OS-000250-GPOS-00093, SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174
Solution
Configure the macOS system to use approved SSH ciphers by creating a plain text file in the /private/etc/ssh/sshd_config.d/ directory containing the following:Ciphers [email protected]
The SSH service must be restarted for changes to take effect.
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Apple_macOS_12_V1R9_STIG.zip
Item Details
Audit Name: DISA STIG Apple macOS 12 v1r9
Category: ACCESS CONTROL, IDENTIFICATION AND AUTHENTICATION, MAINTENANCE
References: 800-53|AC-17(2), 800-53|IA-7, 800-53|MA-4(6), CAT|I, CCI|CCI-000068, CCI|CCI-000803, CCI|CCI-002890, CCI|CCI-003123, Rule-ID|SV-252459r958408_rule, STIG-ID|APPL-12-000054, Vuln-ID|V-252459
Plugin: Unix
Control ID: d866dea12961ce453cc3c42b5fa1143d405a68c71c424e045f507ff8b0047bf3