CVE-2022-28736

CVE Details

Release Date:	2022-06-07
Impact:	Moderate	What is this?

Description

There's a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up operating systems that doesn't support multiboot and do not have direct support from GRUB2. When executing chainloader more than once a use-after-free vulnerability is triggered. If an attacker can control the GRUB2's memory allocation pattern sensitive data may be exposed and arbitrary code execution can be achieved.

See more information about CVE-2022-28736 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:	6.4
Vector String:	CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Version:	3.0
Attack Vector:	Local
Attack Complexity:	High
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-2022-9469	2022-06-07
Oracle Linux version 7 (grub2)	ELSA-2023-12952	2023-10-27
Oracle Linux version 8 (grub2)	ELSA-2022-5095	2022-07-04
Oracle Linux version 8 (grub2)	ELSA-2022-9471	2022-06-07
Oracle Linux version 8 (grub2)	ELSA-2022-9595	2022-07-14
Oracle Linux version 9 (grub2)	ELSA-2022-5099	2022-06-30
Oracle Linux version 9 (grub2)	ELSA-2022-9596	2022-07-14