Expected Behavior Violation Affecting grub2-efi-aa64-cdboot package, versions <1:2.02-87.el8_2


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.1% (43rd 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 IDSNYK-RHEL8-GRUB2EFIAA64CDBOOT-3784114
  • published26 Jul 2021
  • disclosed29 Jul 2020

Introduced: 29 Jul 2020

CVE-2020-15705  (opens in a new tab)
CWE-440  (opens in a new tab)

How to fix?

Upgrade RHEL:8 grub2-efi-aa64-cdboot to version 1:2.02-87.el8_2 or higher.
This issue was patched in RHSA-2020:3216.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub2-efi-aa64-cdboot package and not the grub2-efi-aa64-cdboot package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions.

CVSS Scores

version 3.1