Use After Free Affecting grub2 package, versions [,2.06)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-UNMANAGED-GRUB2-2368580
  • published26 Jan 2022
  • disclosed3 Mar 2021
  • creditUnknown

Introduced: 3 Mar 2021

CVE-2020-25632  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade grub2 to version 2.06 or higher.

Overview

Affected versions of this package are vulnerable to Use After Free. A flaw was found in grub2 in versions prior to 2.06. The rmmod implementation allows the unloading of a module used as a dependency without checking if any other dependent module is still loaded leading to a use-after-free scenario. This could allow arbitrary code to be executed or a bypass of Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS Scores

version 3.1