Sysadmin Creates 'ModuleJail' To Automatically Blacklist Unused Kernel Modules

Long-time Slashdot reader internet-redstar shares an interestging response to “the recent wave of Linux kernel privilege escalation vulnerabilities like ‘Copy Fail’ and ‘Dirty Frag’”: Belgian Linux sysadmin and Tesla Hacker “Jasper Nuyens” got tired of the idea of manually blacklisting dozens or even hundreds of obscure kernel modules across large fleets of Linux systems in the near future. So he wrote ModuleJail, a GPLv3 shell script that scans a running Linux system and automatically blacklists currently unused kernel modules, reducing kernel attack surface without requiring a reboot. The…