CVEvulnerability

CVE-2020-27779

7.5 HIGH Published 2021-03-03 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-03-03
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS 2.0 ([email protected])
6.9 MEDIUM — AV:L/AC:M/Au:N/C:C/I:C/A:C
Weaknesses
CWE-285

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.

Affected configurations

• gnu grub2 (< 2.06) • redhat enterprise linux 7.0 • redhat enterprise linux 8.0 • redhat enterprise linux server aus 7.2 • redhat enterprise linux server aus 7.3 • redhat enterprise linux server aus 7.4 • redhat enterprise linux server aus 7.6 • redhat enterprise linux server aus 7.7 • redhat enterprise linux server aus 8.2 • redhat enterprise linux server eus 7.6 • redhat enterprise linux server eus 7.7 • redhat enterprise linux server eus 8.1 • redhat enterprise linux server tus 7.4 • redhat enterprise linux server tus 7.6 • redhat enterprise linux server tus 7.7 • redhat enterprise linux server tus 8.2 • redhat enterprise linux workstation 7.0 • fedoraproject fedora 33 • fedoraproject fedora 34 • netapp ontap select deploy administration utility

Related

Weakness · CWE (1)

  • CWE-285 Improper Authorization weakness

References