Checkmk Werk 15833: Prevent overriding critical plugins with custom files

ID: 15833 Title: Prevent overriding critical plugins with custom files Component: Setup Level: 1 Class: New feature Version: 2.3.0b1 Previously it was possible to override any Checkmk agent plugin using Custom files rule in Setup. In the case of the agent updater it may lead to serious problems. Since this release the agent updater plugin is protected from overriding. CMK-6917