V-273996

Discussion

Changes to any software components can have significant effects on the overall security of Amazon Linux 2023. This requirement ensures the software has not been tampered with and that it has been provided by a trusted vendor. All software packages must be signed with a cryptographic key recognized and approved by the organization. Verifying the authenticity of software prior to installation validates the integrity of the software package received from a vendor. This verifies the software has not been tampered with and that it has been provided by a trusted vendor.

Check Content

Verify Amazon Linux 2023 is configured so that dnf always checks the GPG signature of locally installed software packages before installation:

$ grep localpkg_gpgcheck /etc/dnf/dnf.conf 
localpkg_gpgcheck=1 

If "localpkg_gpgcheck" is not set to "1" or "True", or if the option is missing or commented out, ask the system administrator how the GPG signatures of local software packages are being verified.

If there is no process to verify GPG signatures approved by the organization, this is a finding.