Out-of-bounds Write Affecting grub2 package, versions <2.06-3


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-DEBIAN13-GRUB2-5681843
  • published8 Jun 2022
  • disclosed6 Jul 2022

Introduced: 8 Jun 2022

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

How to fix?

Upgrade Debian:13 grub2 to version 2.06-3 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.

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 Scores

version 3.1