STIGQter: STIG Summary: VMware vSphere 6.7 Photon OS Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 09 Mar 2021:

The Photon operating system must configure sshd to use preferred ciphers.

DISA Rule

SV-239138r675222_rule

Vulnerability Number

V-239138

Group Title

SRG-OS-000394-GPOS-00174

Rule Version

PHTN-67-000067

Severity

CAT I

CCI(s)

• 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.
• CCI-003123 - The information system implements cryptographic mechanisms to protect the confidentiality of nonlocal maintenance and diagnostic communications.

Weight

10

Fix Recommendation

Open /etc/ssh/sshd_config with a text editor.

Ensure that 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, execute the following command:

# service sshd reload

Check Contents

At the command line, execute the following command:

# 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 does not match the expected result, this is a finding.

Vulnerability Number

V-239138

Documentable

False

Rule Version

PHTN-67-000067

Severity Override Guidance

At the command line, execute the following command:

# 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 does not match the expected result, this is a finding.

Check Content Reference

M

Target Key

5323

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