Linux Kernel LoadPin bypass via dm-verity table reload (Linux Kernel Linux Kernel)

CVE-2022-2503
MEDIUM 6.9

En bref

Source
NVD
EPSS
EPSS 0.42 % · centile 36 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Google
Statut NVD
Modified

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

Faiblesses (CWE)

  • CWE-302 — Authentication Bypass by Assumed-Immutable Data
  • CWE-287 — Authentification incorrecte

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1MEDIUM 6.9CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:NGoogle
CVSS 3.1MEDIUM 6.9CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:NNVD · cve-coordination@google.com (Secondary)
CVSS 3.1MEDIUM 6.7CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux Kernel · Linux Kernelaffected unspecified < 4caae58406f8ceb741603eee460d79bacca9b1b5

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD