Out-of-bounds Write Affecting grub2-ppc64le package, versions <1:2.02-142.el8_7.1.alma


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.04% (15th percentile)

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  • Snyk IDSNYK-ALMALINUX8-GRUB2PPC64LE-5615202
  • published28 May 2023
  • disclosed14 Feb 2023

Introduced: 14 Feb 2023

CVE-2022-3775  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 grub2-ppc64le to version 1:2.02-142.el8_7.1.alma or higher.
This issue was patched in ALSA-2023:0049.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub2-ppc64le package and not the grub2-ppc64le package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.

CVSS Scores

version 3.1