CVE-2021-20233

Published Mar 3, 2021

Last updated a year ago

Overview

Description: A flaw was found in grub2 in versions prior to 2.06. Setparam_prefix() in the menu rendering code performs a length calculation on the assumption that expressing a quoted single quote will require 3 characters, while it actually requires 4 characters which allows an attacker to corrupt memory by one byte for each quote in the input. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Source: secalert@redhat.com
NVD status: Modified

Hype score: Not currently trending

Risk scores

CVSS 3.1

Type: Primary
Base score: 8.2
Impact score: 6
Exploitability score: 1.5
Vector string: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Severity: HIGH

CVSS 2.0

Type: Primary
Base score: 7.2
Impact score: 10
Exploitability score: 3.9
Vector string: AV:L/AC:L/Au:N/C:C/I:C/A:C

Weaknesses

nvd@nist.gov: CWE-787
secalert@redhat.com: CWE-787

Configurations

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Overview

Social media

Risk scores

CVSS 3.1

CVSS 2.0

Weaknesses

Configurations

References