Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
High
Attack Vector
Local
0

CVE-2020-15705

Disclosure Date: July 29, 2020
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions.

Add Assessment

No one has assessed this topic. Be the first to add your voice to the community.

CVSS V3 Severity and Metrics
Base Score:
6.4 Medium
Impact Score:
5.9
Exploitability Score:
0.5
Vector:
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
High
Privileges Required (PR):
High
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Vendors

  • canonical,
  • debian,
  • gnu,
  • microsoft,
  • opensuse,
  • redhat,
  • suse

Products

  • debian linux 10.0,
  • enterprise linux 7.0,
  • enterprise linux 8.0,
  • enterprise linux atomic host -,
  • grub2,
  • leap 15.1,
  • leap 15.2,
  • openshift container platform 4.0,
  • suse linux enterprise server 11,
  • suse linux enterprise server 12,
  • suse linux enterprise server 15,
  • ubuntu linux 14.04,
  • ubuntu linux 16.04,
  • ubuntu linux 18.04,
  • ubuntu linux 20.04,
  • windows 10 -,
  • windows 10 1607,
  • windows 10 1709,
  • windows 10 1803,
  • windows 10 1809,
  • windows 10 1903,
  • windows 10 1909,
  • windows 10 2004,
  • windows 8.1 -,
  • windows rt 8.1 -,
  • windows server 2012 -,
  • windows server 2012 r2,
  • windows server 2016 -,
  • windows server 2016 1903,
  • windows server 2016 1909,
  • windows server 2016 2004,
  • windows server 2019 -

References

Advisory

Additional Info

Technical Analysis