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CVE-2020-15706

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CVE-2020-15706

Published: Jul 29, 2020

Modified: Sep 16, 2024

PUBLISHED

CVSS v3.1

6.4

MEDIUM

Description

GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.

VendorProductVersions

Ubuntu

grub2 in Ubuntu

affected
20.04 LTS - < 2.04-1ubuntu26.1
affected
18.04 LTS - < 2.02-2ubuntu8.16
affected
16.04 LTS - < 2.02~beta2-36ubuntu3.26
affected
14.04 ESM - < 2.02~beta2-9ubuntu1.20

Weaknesses (CWE)

CWE-362

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

References

http://ubuntu.com/security/notices/USN-4432-1
vendor-advisory
x_refsource_UBUNTU
DSA-4735
vendor-advisory
x_refsource_DEBIAN
USN-4432-1
vendor-advisory
x_refsource_UBUNTU
openSUSE-SU-2020:1169
vendor-advisory
x_refsource_SUSE
openSUSE-SU-2020:1168
vendor-advisory
x_refsource_SUSE
GLSA-202104-05
vendor-advisory
x_refsource_GENTOO

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