Out-of-bounds Write Affecting grub package, versions <2.06-r0


Severity

Recommended
0.0
high
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.04% (6th 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-ALPINE319-GRUB-6106583
  • published8 Dec 2023
  • disclosed3 Mar 2021

Introduced: 3 Mar 2021

CVE-2021-20233  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Alpine:3.19 grub to version 2.06-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub package and not the grub package as distributed by Alpine. See How to fix? for Alpine:3.19 relevant fixed versions and status.

A flaw was found in grub2 in versions prior to 2.06. Setparam_prefix() in the menu rendering code performs a length calculation on the assumption that expressing a quoted single quote will require 3 characters, while it actually requires 4 characters which allows an attacker to corrupt memory by one byte for each quote in the input. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS Scores

version 3.1