Check: APPL-14-000057
Apple macOS 14 (Sonoma) STIG:
APPL-14-000057
(in versions v1 r2 through v1 r1)
Title
The macOS system must limit SSH to FIPS-compliant connections. (Cat I impact)
Discussion
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
Check Content
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 "$fips_ssh_config" /etc/ssh/ssh_config.d/fips_ssh_config If the result is not "8", this is a finding.
Fix Text
Configure the macOS system to limit SSH to FIPS-compliant connections with the following command: fips_ssh_config="Host * Ciphers aes128-gcm@openssh.com HostbasedAcceptedAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@openssh.com HostKeyAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@openssh.com KexAlgorithms ecdh-sha2-nistp256 MACs hmac-sha2-256 PubkeyAcceptedAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@openssh.com CASignatureAlgorithms ecdsa-sha2-nistp256" /bin/echo "${fips_ssh_config}" > /etc/ssh/ssh_config.d/fips_ssh_config
Additional Identifiers
Rule ID: SV-259439r945376_rule
Vulnerability ID: V-259439
Group Title: SRG-OS-000033-GPOS-00014
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000068 |
The information system implements cryptographic mechanisms to protect the confidentiality of remote access sessions. |
| CCI-000803 |
The information system implements mechanisms for authentication to a cryptographic module that meet the requirements of applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance for such authentication. |
| CCI-001453 |
The information system implements cryptographic mechanisms to protect the integrity of remote access sessions. |
| CCI-002421 |
The information system implements cryptographic mechanisms to prevent unauthorized disclosure of information and/or detect changes to information during transmission unless otherwise protected by organization-defined alternative physical safeguards. |
| CCI-002450 |
The information system implements organization-defined cryptographic uses and type of cryptography required for each use in accordance with applicable federal laws, Executive Orders, directives, policies, regulations, and standards. |