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The Photon operating system must implement only approved Message Authentication Codes (MACs) to protect the integrity of remote access sessions.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-258900PHTN-40-000239SV-258900r991554_ruleCCI-001453high
Description
Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote access (e.g., RDP) is access to DOD nonpublic information systems by an authorized user (or an information system) communicating through an external, nonorganization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless. Cryptographic mechanisms used for protecting the integrity of information include, for example, signed hash functions using asymmetric cryptography enabling distribution of the public key to verify the hash information while maintaining the confidentiality of the secret key used to generate the hash.
STIGDate
VMware vSphere 8.0 vCenter Appliance Photon OS 4.0 Security Technical Implementation Guide2026-06-02

Related Frameworks

1 mapping across 4 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

NET-14.2Protection of Confidentiality / Integrity Using Encryption
1.00
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (31) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-17(1)Monitoring and Control
1.00
AC-17(2)Protection of Confidentiality and Integrity Using Encryption
1.00
AC-3Access Enforcement
1.00
CM-6Configuration Settings
1.00
CM-7Least Functionality
1.00
IA-2(8)Access to Accounts — Replay Resistant
1.00
IA-2(9)Network Access to Non-privileged Accounts — Replay Resistant
1.00
IA-3Device Identification and Authentication
1.00
IA-3(1)Cryptographic Bidirectional Authentication
1.00
IA-5(1)Password-based Authentication
1.00

+21 more (top 10 by confidence shown)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.1.13
1.00
CCI1 mapping
CCI-001453
1.00

Details

Check Text (C-258900r991554_chk)

At the command line, run the following command to verify the running configuration of sshd: # sshd -T|&grep -i MACs Example result: macs hmac-sha2-512,hmac-sha2-256 If the output matches the macs in the example result or a subset thereof, this is not a finding. If the output contains any macs not listed in the example result, this is a finding.

Fix Text (F-62549r933760_fix)

Navigate to and open: /etc/ssh/sshd_config Ensure the "MACs" line is uncommented and set to the following: MACs hmac-sha2-512,hmac-sha2-256 At the command line, run the following command: # systemctl restart sshd.service