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

CVE-2020-25632

Disclosure Date: March 03, 2021
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

A flaw was found in grub2 in versions prior to 2.06. The rmmod implementation allows the unloading of a module used as a dependency without checking if any other dependent module is still loaded leading to a use-after-free scenario. This could allow arbitrary code to be executed or a bypass of Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

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CVSS V3 Severity and Metrics
Base Score:
8.2 High
Impact Score:
6
Exploitability Score:
1.5
Vector:
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
High
User Interaction (UI):
None
Scope (S):
Changed
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Vendors

  • fedoraproject,
  • gnu,
  • netapp,
  • redhat

Products

  • enterprise linux 7.0,
  • enterprise linux 8.0,
  • enterprise linux server aus 7.2,
  • enterprise linux server aus 7.3,
  • enterprise linux server aus 7.4,
  • enterprise linux server aus 7.6,
  • enterprise linux server aus 7.7,
  • enterprise linux server aus 8.2,
  • enterprise linux server eus 7.6,
  • enterprise linux server eus 7.7,
  • enterprise linux server eus 8.1,
  • enterprise linux server tus 7.4,
  • enterprise linux server tus 7.6,
  • enterprise linux server tus 7.7,
  • enterprise linux server tus 8.2,
  • enterprise linux workstation 7.0,
  • fedora 33,
  • fedora 34,
  • grub2,
  • ontap select deploy administration utility -
Technical Analysis