CVE Published: 12/08/2022 |
CVE Updated: 03/08/2024 |
CVE Year: 2022 Source: Google |
Vendor: Linux Kernel |
Product: Linux Kernel Status : PUBLISHED
CVE-2022-2503 Description
Dm-verity is used for extending root-of-trust to root filesystems. LoadPin builds on this property to restrict module/firmware loads to just the trusted root filesystem. Device-mapper table reloads currently allow users with root privileges to switch out the target with an equivalent dm-linear target and bypass verification till reboot. This allows root to bypass LoadPin and can be used to load untrusted and unverified kernel modules and firmware, which implies arbitrary kernel execution and persistence for peripherals that do not verify firmware updates. We recommend upgrading past commit 4caae58406f8ceb741603eee460d79bacca9b1b5
Metrics
CVSS Version: 3.1 |
Base Score: 6.9 MEDIUM Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
l➤ Exploitability Metrics: Attack Vector (AV)* LOCAL Attack Complexity (AC)* HIGH Privileges Required (PR)* HIGH User Interaction (UI)* REQUIRED Scope (S)* CHANGED
l➤ Impact Metrics: Confidentiality Impact (C)* HIGH Integrity Impact (I)* HIGH Availability Impact (A)* NONE
Weakness Enumeration (CWE)
CWE-ID: CWE-302 CWE Name: CWE-302 Authentication Bypass by Assumed-Immutable Data Source: Linux Kernel
Common Attack Pattern Enumeration and Classification (CAPEC)