Improper Verification of Cryptographic Signature Affecting kernel-rt package, versions <0:4.18.0-305.7.1.rt7.79.el8_4


Severity

Recommended
high

Based on CentOS security rating

    Threat Intelligence

    EPSS
    0.05% (22nd percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk ID SNYK-CENTOS8-KERNELRT-2114798
  • published 26 Jul 2021
  • disclosed 15 Sep 2020

How to fix?

Upgrade Centos:8 kernel-rt to version 0:4.18.0-305.7.1.rt7.79.el8_4 or higher.

NVD Description

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

The Linux kernel through 5.8.13 does not properly enforce the Secure Boot Forbidden Signature Database (aka dbx) protection mechanism. This affects certs/blacklist.c and certs/system_keyring.c.

CVSS Scores

version 3.1
Expand this section

NVD

6.5 medium
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    High
  • User Interaction (UI)
    Required
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High
Expand this section

Red Hat

6.5 medium
Expand this section

SUSE

6 medium