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The Photon operating system must implement only approved ciphers to protect the integrity of remote access sessions.


Finding ID Version Rule ID IA Controls Severity
V-258835 PHTN-40-000079 SV-258835r933566_rule High
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.
VMware vSphere 8.0 vCenter Appliance Photon OS 4.0 Security Technical Implementation Guide 2023-10-29


Check Text ( C-62575r933564_chk )
At the command line, run the following command to verify the running configuration of sshd:

# sshd -T|&grep -i Ciphers

Expected result:

ciphers aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr

If the output matches the ciphers in the expected result or a subset thereof, this is not a finding.

If the ciphers in the output contain any ciphers not listed in the expected result, this is a finding.
Fix Text (F-62484r933565_fix)
Navigate to and open:


Ensure the "Ciphers" line is uncommented and set to the following:

Ciphers aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr

At the command line, run the following command:

# systemctl restart sshd.service