Out-of-bounds Write Affecting grub2 package, versions <2.06-5


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.04% (15th percentile)

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  • Snyk IDSNYK-DEBIAN13-GRUB2-5681850
  • published16 Nov 2022
  • disclosed19 Dec 2022

Introduced: 16 Nov 2022

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

How to fix?

Upgrade Debian:13 grub2 to version 2.06-5 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub2 package and not the grub2 package as distributed by Debian. See How to fix? for Debian:13 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