Puppet configuration management system upgraded to 7 5.1.4. Changes to packages that set the system clock 5.1.3. Non-free firmware moved to its own component in the archiveĥ.1.2. Upgrade specific items for bookworm 5.1.1. This will encrypt the key with a passphrase.Table of Contents 5.1. Or, as noted in this comment, remove the option -nodes in step number 1. You may chmod it, encrypt ( gpg) it, or store it somewhere else safe(r). Since the private key you created ( MOK.priv in this example) can be used by anyone who can have access to it, it is good practice to keep it secure. Check out my vboxsign originally on GitHub.Īdditional note for the security (extra-)conscious: -) (they've been working on it) -)Īdditional resource: I created a bash script for my own use every time virtualbox-dkms upgrades and thus overwrites the signed modules. Resources: Detailed website article for Fedora and Ubuntu implementation of module signing. Please let me know if your modules would run this way on Ubuntu 16.04 (on kernel 4.4.0-21, I believe). If the key has been enrolled properly, it will show up under sudo mokutil -list-enrolled. Reboot and follow instructions to Enroll MOK (Machine Owner Key). Supply a password for later use after reboot Register the keys to Secure Boot sudo mokutil -import MOK.der MOK.der /path/to/module is an alternative if sign-file is not available. Note 1: There can be multiple files to be signed for a single driver/module, so /path/to/module may need to be replaced with $(modinfo -n ), e.g. Sign the module sudo /usr/src/linux-headers-$(uname -r)/scripts/sign-file sha256. If you'd want to keep Secure Boot and also run these modules, then the next logical step is to sign those modules.Ĭreate signing keys openssl req -new -x509 -newkey rsa:2048 -keyout MOK.priv -outform DER -out MOK.der -nodes -days 36500 -subj "/CN=Descriptive name/" Since kernel version 4.4.0-20, it was enforced that unsigned kernel modules will not be allowed to run with Secure Boot enabled. Ubuntu 16.04, 15.10 and 14.04 are affected.Īs suggested by user I'm copying (with edits) an answer here: Update: Now this kernel config is enabled in all supported Ubuntu kernels. I did not get it from the first attempt either -) Some UEFI firmware asks not for the full password, but to enter some characters of it, like 1st, 3rd, etc. Then you will be asked to enter the previously created password. After you reboot, UEFI will ask if you want to change security settings. The password should be at least 8 characters long. Since Ubuntu kernel build 4.4.0-21.37 this can be fixed by running sudo apt install mokutil It may be Del, or F2 on boot, or something else.Īn alternative way is to disable Secure Boot using mokutil. Read your computer manual to see how to get there. You can get into UEFI directly, but it depends on your hardware. Secure Boot option should be in "Security" or "Boot" section of the UEFI. Press ESC button on booting, get into grub menu and select System Setup. In most cases you can get into UEFI settings using grub menu. The easiest way to fix this issue is to disable Secure Boot in UEFI (BIOS) settings. That prevents from loading unsigned third party modules if UEFI Secure Boot is enabled. Since Ubuntu kernel 4.4.0-20 the EFI_SECURE_BOOT_SIG_ENFORCE kernel config has been enabled.
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