CVE-2022-28735

2023-07-2001:15:10

Debian Security Bug Tracker

security-tracker.debian.org

grub2

shim_lock

vulnerability

non-kernel files

secure boot

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

0.0004 Low

EPSS

Percentile

5.1%

JSON

The GRUB2’s shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.

OSVersionArchitecturePackageVersionFilename
Debian12allgrub2< 2.06-3grub2_2.06-3_all.deb
Debian11allgrub2< 2.06-3~deb11u1grub2_2.06-3~deb11u1_all.deb
Debian999allgrub2< 2.06-3grub2_2.06-3_all.deb
Debian13allgrub2< 2.06-3grub2_2.06-3_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	12	all	grub2	< 2.06-3	grub2_2.06-3_all.deb
Debian	11	all	grub2	< 2.06-3~deb11u1	grub2_2.06-3~deb11u1_all.deb
Debian	999	all	grub2	< 2.06-3	grub2_2.06-3_all.deb
Debian	13	all	grub2	< 2.06-3	grub2_2.06-3_all.deb