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Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : GRUB2 regression (USN-4432-2)

medium Nessus Plugin ID 139365

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-4432-2 advisory.

 USN-4432-1 fixed vulnerabilities in GRUB2 affecting Secure Boot environments. Unfortunately, the update introduced regressions for some BIOS systems (either pre-UEFI or UEFI configured in Legacy mode), preventing them from successfully booting. This update addresses the issue.

 Users with BIOS systems that installed GRUB2 versions from USN-4432-1 should verify that their GRUB2 installation has a correct understanding of their boot device location and installed the boot loader correctly.

 We apologize for the inconvenience.



Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-4432-2

Plugin Details

Severity: Medium

ID: 139365

File Name: ubuntu_USN-4432-2.nasl

Version: 1.14

Type: local

Agent: unix

Published: 8/6/2020

Updated: 10/29/2024

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:grub-emu, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:grub-ieee1275, p-cpe:/a:canonical:ubuntu_linux:grub-common, p-cpe:/a:canonical:ubuntu_linux:grub-mount-udeb, p-cpe:/a:canonical:ubuntu_linux:grub2, p-cpe:/a:canonical:ubuntu_linux:grub-uboot, p-cpe:/a:canonical:ubuntu_linux:grub-uboot-bin, p-cpe:/a:canonical:ubuntu_linux:grub-xen-host, p-cpe:/a:canonical:ubuntu_linux:grub-coreboot-bin, p-cpe:/a:canonical:ubuntu_linux:grub-efi, p-cpe:/a:canonical:ubuntu_linux:grub-efi-arm, p-cpe:/a:canonical:ubuntu_linux:grub-efi-arm64-bin, p-cpe:/a:canonical:ubuntu_linux:grub-ieee1275-bin, p-cpe:/a:canonical:ubuntu_linux:grub-pc-bin, p-cpe:/a:canonical:ubuntu_linux:grub-efi-arm64-signed, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:grub-linuxbios, p-cpe:/a:canonical:ubuntu_linux:grub-xen-bin, p-cpe:/a:canonical:ubuntu_linux:grub-pc, p-cpe:/a:canonical:ubuntu_linux:grub-theme-starfield, p-cpe:/a:canonical:ubuntu_linux:grub-firmware-qemu, p-cpe:/a:canonical:ubuntu_linux:grub-efi-arm64-signed-template, p-cpe:/a:canonical:ubuntu_linux:grub-efi-arm64, p-cpe:/a:canonical:ubuntu_linux:grub-xen, p-cpe:/a:canonical:ubuntu_linux:grub2-common, p-cpe:/a:canonical:ubuntu_linux:grub-rescue-pc, p-cpe:/a:canonical:ubuntu_linux:grub-efi-amd64, p-cpe:/a:canonical:ubuntu_linux:grub-efi-amd64-signed, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:grub-efi-amd64-bin, p-cpe:/a:canonical:ubuntu_linux:grub-efi-amd64-signed-template, p-cpe:/a:canonical:ubuntu_linux:grub-efi-arm-bin, p-cpe:/a:canonical:ubuntu_linux:grub-efi-ia32-bin, p-cpe:/a:canonical:ubuntu_linux:grub-efi-ia32, p-cpe:/a:canonical:ubuntu_linux:grub-coreboot

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Ease: No known exploits are available

Patch Publication Date: 8/4/2020

Vulnerability Publication Date: 7/29/2020

Reference Information

IAVA: 2020-A-0349

USN: 4432-2