CVE-2021-20225

CVE Details

Release Date:	2021-03-03
Impact:	None	What is this?

Description

A flaw was found in grub2 in versions prior to 2.06. The option parser allows an attacker to write past the end of a heap-allocated buffer by calling certain commands with a large number of specific short forms of options. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

See more information about CVE-2021-20225 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	6.7
Vector String:	CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Version:	3.0
Attack Vector:	Local
Attack Complexity:	Low
Privileges Required:	High
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	High
Integrity Impact:	High
Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (grub2)	ELSA-2021-0699	2021-03-05
Oracle Linux version 7 (grub2)	ELSA-2021-9076	2021-03-02
Oracle Linux version 8 (grub2)	ELSA-2021-0696	2021-03-05
Oracle Linux version 8 (grub2)	ELSA-2021-9077	2021-03-02