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V-239642

CAT II (Medium)

The SLES for vRealize must implement NIST FIPS-validated cryptography for the following: to provision digital signatures, to generate cryptographic hashes, and to protect unclassified information requiring confidentiality and cryptographic protection in accordance with applicable federal laws, Executive Orders, directives, policies, regulations, and standards.

Rule ID

SV-239642r878123_rule

STIG

VMware vRealize Operations Manager 6.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 SLES for vRealize 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 allowed MACs:

# grep -i macs /etc/ssh/sshd_config | grep -v '^#' 

If no lines are returned, or the returned MACs list contains any MAC other than "hmac-sha1", this is a finding.

Fix Text

Edit the SSH daemon configuration and remove any MACs other than "hmac-sha1". If necessary, add a "MACs" line. 

# sed -i "/^[^#]*MACs/ c\MACs hmac-sha1" /etc/ssh/sshd_config