V-279577

Discussion

Changes to any software components can have significant effects on the overall security of the operating system. This requirement ensures the software has not been tampered with and that it has been provided by a trusted vendor. Accordingly, patches, service packs, device drivers, or operating system components must be signed with a certificate recognized and approved by the organization. Verifying the authenticity of the software prior to installation validates the integrity of the patch or upgrade received from a vendor. This ensures the software has not been tampered with and that it has been provided by a trusted vendor. Self-signed certificates are disallowed by this requirement. The operating system should not have to verify the software again. This requirement does not mandate DOD certificates for this purpose; however, the certificate used to verify the software must be from an approved certificate authority (CA).

Check Content

Nutanix OS is a vendor-supported appliance; no connection to any upstream repos is configured or allowed. All patches, service packs, device drivers, and operating system components are solely provided by the vendor. The vendor ensures that all installation packages are properly signed prior to distribution to customer(s). 

Verify Nutanix AOS is configured to require "gpgcheck" and "localpkg_gpgcheck" for all installation packages provided by the vendor using the following commands:

$ sudo grep gpgcheck /etc/yum.conf
gpgcheck=1

$ sudo grep localpkg_gpgcheck /etc/yum.conf
localpkg_gpgcheck=1

$ sudo grep repo_gpgcheck /etc/yum.conf
repo_gpgcheck=1

If any output is not set to "1", this is a finding.