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CVE-2020-14372

CVE-2020-14372

This page contains facts from public vulnerability sources. Check the original advisory before updating.

A flaw was found in grub2 in versions prior to 2.06, where it incorrectly enables the usage of the ACPI command when Secure Boot is enabled. This flaw allows an attacker with privileged access to craft a Secondary System Description Table (SSDT) containing code to overwrite the Linux kernel lockdown variable content directly into memory. The table is further loaded and executed by the kernel, defeating its Secure Boot lockdown and allowing the attacker to load unsigned code. The highest threat from this vulnerability is to data confidentiality and integrity, as well as system availability.

CVSS 7.5 · High · EPSS 1.7% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • grub2

    Versions
    • grub 2.06: Affected

    No fix published

  • grub2 Debian:12

    Affected ranges
    • ECOSYSTEM: < 2.04-16

    Update to 2.04-16

  • grub2 Debian:13

    Affected ranges
    • ECOSYSTEM: < 2.04-16

    Update to 2.04-16

  • grub2 Debian:14

    Affected ranges
    • ECOSYSTEM: < 2.04-16

    Update to 2.04-16

  • grub2-signed Ubuntu:Pro:14.04:LTS

    Versions
    • 1.22
    • 1.23
    • 1.24
    • 1.25
    • 1.26
    • 1.27
    • 1.30
    • 1.31
    • 1.32
    • 1.33
    • 1.34
    • 1.34.1
    • 1.34.2
    • 1.34.3
    • 1.34.4
    • 1.34.5
    • 1.34.6
    • 1.34.7
    • 1.34.8
    • 1.34.9
    • 1.34.13
    • 1.34.14
    • 1.34.16
    • 1.34.17
    • 1.34.18
    • 1.34.20
    • 1.34.22
    • 1.34.24
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • grub2-signed Ubuntu:18.04:LTS

    Versions
    • 1.85
    • 1.86
    • 1.87
    • 1.89
    • 1.91
    • 1.92
    • 1.93
    • 1.93.1
    • 1.93.2
    • 1.93.3
    • 1.93.4
    • 1.93.5
    • 1.93.7
    • 1.93.8
    • 1.93.10
    • 1.93.11
    • 1.93.13
    • 1.93.14
    • 1.93.15
    • 1.93.16
    • 1.93.18
    • 1.93.19
    • 1.93.20
    • 1.93.21
    • 1.93.22
    • 1.93.24
    • 1.167~18.04.1
    • 1.167~18.04.3
    Affected ranges
    • ECOSYSTEM: < 1.167~18.04.5

    Update to 1.167~18.04.5

  • grub2-unsigned Ubuntu:18.04:LTS

    Versions
    • 2.04-1ubuntu44
    • 2.04-1ubuntu44.1
    Affected ranges
    • ECOSYSTEM: < 2.04-1ubuntu44.1.2

    Update to 2.04-1ubuntu44.1.2

  • grub2-signed Ubuntu:20.04:LTS

    Versions
    • 1.128
    • 1.129
    • 1.130
    • 1.131
    • 1.133
    • 1.134
    • 1.135
    • 1.136
    • 1.137
    • 1.138
    • 1.139
    • 1.140
    • 1.141
    • 1.142
    • 1.142.1
    • 1.142.3
    • 1.142.4
    • 1.142.5
    • 1.142.6
    • 1.142.8
    • 1.142.9
    • 1.142.10
    • 1.142.11
    • 1.167
    Affected ranges
    • ECOSYSTEM: < 1.167.2

    Update to 1.167.2

  • grub2-unsigned Ubuntu:20.04:LTS

    Versions
    • 2.04-1ubuntu44
    Affected ranges
    • ECOSYSTEM: < 2.04-1ubuntu44.2

    Update to 2.04-1ubuntu44.2

Original sources

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