Ubuntu: 4992-1 Critical: GRUB 2 Bootloader Security Flaws
ubuntu
June 18, 2021
Several security issues were fixed in GRUB 2.
Summary
Topics Covered
Update Instructions
The problem can be corrected by updating your system to the following package versions: Ubuntu 20.10: grub-efi-amd64-bin 2.04-1ubuntu44.2 grub-efi-amd64-signed 1.167.2+2.04-1ubuntu44.2 grub-efi-arm64-bin 2.04-1ubuntu44.2 grub-efi-arm64-signed 1.167.2+2.04-1ubuntu44.2 Ubuntu 20.04 LTS: grub-efi-amd64-bin 2.04-1ubuntu44.2 grub-efi-amd64-signed 1.167.2+2.04-1ubuntu44.2 grub-efi-arm64-bin 2.04-1ubuntu44.2 grub-efi-arm64-signed 1.167.2+2.04-1ubuntu44.2 Ubuntu 18.04 LTS: grub-efi-amd64-bin 2.04-1ubuntu44.1.2 grub-efi-amd64-signed 1.167~18.04.5+2.04-1ubuntu44.1.2 grub-efi-arm64-bin 2.04-1ubuntu44.1.2 grub-efi-arm64-signed 1.167~18.04.5+2.04-1ubuntu44.1.2 After a standard system update you need to reboot your computer to make all the necessary changes.
References
https://ubuntu.com/security/notices/USN-4992-1
CVE-2020-14372, CVE-2020-25632, CVE-2020-27749,
CVE-2020-27779, CVE-2021-20225, CVE-2021-20233,
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June 18, 2021
Topics Covered
Package Information
https://launchpad.net/ubuntu/+source/grub2-signed/1.167.2 https://launchpad.net/ubuntu/+source/grub2-unsigned/2.04-1ubuntu44.2 https://launchpad.net/ubuntu/+source/grub2-signed/1.167.2 https://launchpad.net/ubuntu/+source/grub2-unsigned/2.04-1ubuntu44.2 https://launchpad.net/ubuntu/+source/grub2-signed/1.167~18.04.5 https://launchpad.net/ubuntu/+source/grub2-unsigned/2.04-1ubuntu44.1.2
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