The macOS system must limit SSH to FIPS-compliant connections.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-259439 | APPL-14-000057 | SV-259439r958408_rule | CCI-000068 | high |
| Description | ||||
| SSH must be configured to limit the Ciphers, HostbasedAcceptedAlgorithms, HostKeyAlgorithms, KexAlgorithms, MACs, PubkeyAcceptedAlgorithms, CASignatureAlgorithms to algorithms that are FIPS 140 validated. FIPS 140-2 is the current standard for validating that mechanisms used to access cryptographic modules utilize authentication that meet federal requirements. Operating systems utilizing encryption must use FIPS-validated mechanisms for authenticating to cryptographic modules. Note: For more information on FIPS compliance with the version of SSH included in the macOS, the manual page apple_ssh_and_fips has additional information. Satisfies: SRG-OS-000033-GPOS-00014,SRG-OS-000120-GPOS-00061,SRG-OS-000250-GPOS-00093,SRG-OS-000396-GPOS-00176,SRG-OS-000424-GPOS-00188,SRG-OS-000478-GPOS-00223 | ||||
| STIG | Date | |||
| Apple macOS 14 (Sonoma) Security Technical Implementation Guide | 2024-12-04 | |||
Related Frameworks
3 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
AC-17(2)
1.00
- DISA · 2 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1711 mapping
3.1.13
1.00
- DISA · 2 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-000068
1.00
- DISA · 2 · disa_xccdf · related
Details
Check Text (C-259439r958408_chk)
Verify the macOS system is configured to limit SSH to FIPS-compliant connections with the following command:
fips_ssh_config="Host *
Ciphers aes128-gcm@openssh.com
HostbasedAcceptedAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@openssh.com
HostKeyAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@openssh.com
KexAlgorithms ecdh-sha2-nistp256
MACs hmac-sha2-256
PubkeyAcceptedAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@openssh.com
CASignatureAlgorithms ecdsa-sha2-nistp256"
/usr/bin/grep -c "$fips_ssh_config" /etc/ssh/ssh_config.d/fips_ssh_config
If the result is not "8", this is a finding.
Fix Text (F-63086r945376_fix)
Configure the macOS system to limit SSH to FIPS-compliant connections with the following command:
fips_ssh_config="Host *
Ciphers aes128-gcm@openssh.com
HostbasedAcceptedAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@openssh.com
HostKeyAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@openssh.com
KexAlgorithms ecdh-sha2-nistp256
MACs hmac-sha2-256
PubkeyAcceptedAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@openssh.com
CASignatureAlgorithms ecdsa-sha2-nistp256"
/bin/echo "${fips_ssh_config}" > /etc/ssh/ssh_config.d/fips_ssh_config