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


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.12% (47th percentile)

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  • Snyk IDSNYK-ALPINE319-GRUB-6106542
  • published8 Dec 2023
  • disclosed3 Mar 2021

Introduced: 3 Mar 2021

CVE-2020-25647  (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. During USB device initialization, descriptors are read with very little bounds checking and assumes the USB device is providing sane values. If properly exploited, an attacker could trigger memory corruption leading to arbitrary code execution allowing a bypass of the Secure Boot mechanism. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS Scores

version 3.1