CVE-2022-28736

Public on 2022-07-05
Modified on 2024-02-01
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.
Severity
Medium severity
Medium
CVSS v3 Base Score
6.4
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2 - Core grub2 2023-07-17 ALAS2-2023-2146 Fixed
Amazon Linux 2023 grub2 2023-02-17 ALAS2023-2023-020 Fixed

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 6.4 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H