CVE-2020-27779

CVE Details

Release Date:

2021-03-03

Description

A flaw was found in grub2 in versions prior to 2.06. The cutmem command does not honor secure boot locking allowing an privileged attacker to remove address ranges from memory creating an opportunity to circumvent SecureBoot protections after proper triage about grub's memory layout. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

See more information about CVE-2020-27779 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score:	7.5	Base Metrics:	AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Access Vector:	Local network	Attack Complexity:	High
Privileges Required:	High	User Interaction:	None
Scope:	Changed	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

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team