Out-of-bounds Write Affecting grub2-tools-minimal package, versions <1:2.06-27.el9_0.7.alma


Severity

Recommended
0.0
high
0
10

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.05% (19th percentile)

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  • Snyk IDSNYK-ALMALINUX9-GRUB2TOOLSMINIMAL-5658882
  • published28 May 2023
  • disclosed16 Jun 2022

Introduced: 16 Jun 2022

CVE-2021-3697  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 grub2-tools-minimal to version 1:2.06-27.el9_0.7.alma or higher.
This issue was patched in ALSA-2022:5099.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub2-tools-minimal package and not the grub2-tools-minimal package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.

CVSS Base Scores

version 3.1