Authentication Bypass Affecting kernel-debug-modules package, versions <0:4.18.0-372.75.1.el8_6


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.1% (42nd percentile)

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  • Snyk IDSNYK-RHEL8-KERNELDEBUGMODULES-5956119
  • published14 Mar 2023
  • disclosed12 Aug 2022

Introduced: 12 Aug 2022

CVE-2022-2503  (opens in a new tab)
CWE-288  (opens in a new tab)

How to fix?

Upgrade RHEL:8 kernel-debug-modules to version 0:4.18.0-372.75.1.el8_6 or higher.
This issue was patched in RHSA-2023:5627.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-debug-modules package and not the kernel-debug-modules package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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

CVSS Scores

version 3.1