← Back to VMware vRealize Automation 7.x SLES Security Technical Implementation Guide

V-240516

CAT I (High)

The SLES for vRealize must implement NSA-approved cryptography to protect classified information in accordance with applicable federal laws, Executive Orders, directives, policies, regulations, and standards.

Rule ID

SV-240516r877380_rule

STIG

VMware vRealize Automation 7.x SLES Security Technical Implementation Guide

Version

V2R2

CCIs

CCI-002450

Discussion

Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. The operating system must implement cryptographic modules adhering to the higher standards approved by the federal government since this provides assurance they have been tested and validated.

Check Content

Check the SSH daemon configuration for DoD-approved encryption to protect the confidentiality of SSH remote connections by performing the following commands:

Check the "Ciphers" setting in the "sshd_config" file.

# grep -i Ciphers /etc/ssh/sshd_config  | grep -v '#' 

The output must contain either nothing or any number of the following algorithms:

aes128-ctr, aes256-ctr.

If the output contains an algorithm not listed above, this is a finding.

Expected Output:
Ciphers aes256-ctr,aes128-ctr

Fix Text

Update the "Ciphers" directive with the following command: 

# sed -i "/^[^#]*Ciphers/ c\Ciphers aes256-ctr,aes128-ctr" /etc/ssh/sshd_config

Save and close the file. 

Restart the sshd process: 

# service sshd restart