The application must have the capability to prevent the installation of patches, service packs, or application components without verification the software component has been digitally signed using a certificate that is recognized and approved by the organization.

From Application Security and Development Security Technical Implementation Guide

Associated with: CCI-001749

SV-84131r1_rule The application must have the capability to prevent the installation of patches, service packs, or application components without verification the software component has been digitally signed using a certificate that is recognized and approved by the organization.

Vulnerability discussion

Changes to any software components can have significant effects on the overall security of the application. Verifying software components have been digitally signed using a certificate that is recognized and approved by the organization ensures the software has not been tampered with and that it has been provided by a trusted vendor.Accordingly, patches, service packs, or application 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 application 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 CA.If this capability is not present, the vendor must provide a cryptographic hash value that can be verified by a system administrator prior to installation.

Check content

Review the application documentation and interview the application administrator to determine the process and commands used for patching the application. Access application configuration settings. Review commands and procedures used to patch the application and ensure a capability exists to prevent unsigned patches from being applied. If the application is not capable of preventing installation of patches and packages that are not signed, or if the vendor does not provide a cryptographic hash value that can be manually checked prior to installation, this is a finding.

Fix text

Design and configure the application to have the capability to prevent unsigned patches and packages from being installed. Provide a cryptographic hash value that can be verified by a system administrator prior to installation.

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