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CVE-2020-15705

CVE-2020-15705 · GRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot without shim

Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.

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.

CVSS 6.4 · Media · EPSS 1,4% · Corrección disponible

Publicación
Actualización

Pila tecnológica: system

Productos y versiones afectados

  • grub2 in ubuntu

    Versiones
    • ≥ 20.04 LTS, < 2.04-1ubuntu26.1: Afectada (custom)
    • ≥ 18.04 LTS, < 2.02-2ubuntu8.16: Afectada (custom)
    • ≥ 16.04 LTS, < 2.02~beta2-36ubuntu3.26: Afectada (custom)
    • ≥ 14.04 ESM, < 2.02~beta2-9ubuntu1.20: Afectada (custom)

    Sin corrección publicada

  • grub2 Ubuntu:Pro:14.04:LTS

    Versiones
    • 2.00-19ubuntu2
    • 2.00-19ubuntu3
    • 2.00-19ubuntu4
    • 2.00-20
    • 2.00-21
    • 2.00-22
    • 2.02~beta2-5
    • 2.02~beta2-6
    • 2.02~beta2-7
    • 2.02~beta2-8
    • 2.02~beta2-9
    • 2.02~beta2-9ubuntu1
    • 2.02~beta2-9ubuntu1.1
    • 2.02~beta2-9ubuntu1.2
    • 2.02~beta2-9ubuntu1.3
    • 2.02~beta2-9ubuntu1.4
    • 2.02~beta2-9ubuntu1.5
    • 2.02~beta2-9ubuntu1.6
    • 2.02~beta2-9ubuntu1.7
    • 2.02~beta2-9ubuntu1.8
    • 2.02~beta2-9ubuntu1.11
    • 2.02~beta2-9ubuntu1.12
    • 2.02~beta2-9ubuntu1.14
    • 2.02~beta2-9ubuntu1.15
    • 2.02~beta2-9ubuntu1.16
    • 2.02~beta2-9ubuntu1.17
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.02~beta2-9ubuntu1.20

    Actualiza a 2.02~beta2-9ubuntu1.20

  • grub2-signed Ubuntu:Pro:14.04:LTS

    Versiones
    • 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
    Intervalos de versiones afectados
    • ECOSYSTEM: < 1.34.22

    Actualiza a 1.34.22

  • grub2 Ubuntu:16.04:LTS

    Versiones
    • 2.02~beta2-29
    • 2.02~beta2-31
    • 2.02~beta2-31ubuntu1
    • 2.02~beta2-32
    • 2.02~beta2-32ubuntu1
    • 2.02~beta2-35
    • 2.02~beta2-35ubuntu1
    • 2.02~beta2-36
    • 2.02~beta2-36ubuntu1
    • 2.02~beta2-36ubuntu2
    • 2.02~beta2-36ubuntu3
    • 2.02~beta2-36ubuntu3.1
    • 2.02~beta2-36ubuntu3.2
    • 2.02~beta2-36ubuntu3.6
    • 2.02~beta2-36ubuntu3.7
    • 2.02~beta2-36ubuntu3.8
    • 2.02~beta2-36ubuntu3.9
    • 2.02~beta2-36ubuntu3.11
    • 2.02~beta2-36ubuntu3.12
    • 2.02~beta2-36ubuntu3.14
    • 2.02~beta2-36ubuntu3.15
    • 2.02~beta2-36ubuntu3.16
    • 2.02~beta2-36ubuntu3.17
    • 2.02~beta2-36ubuntu3.18
    • 2.02~beta2-36ubuntu3.19
    • 2.02~beta2-36ubuntu3.20
    • 2.02~beta2-36ubuntu3.21
    • 2.02~beta2-36ubuntu3.22
    • 2.02~beta2-36ubuntu3.23
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.02~beta2-36ubuntu3.26

    Actualiza a 2.02~beta2-36ubuntu3.26

  • grub2-signed Ubuntu:16.04:LTS

    Versiones
    • 1.55
    • 1.56
    • 1.57
    • 1.58
    • 1.59
    • 1.61
    • 1.62
    • 1.63
    • 1.64
    • 1.65
    • 1.66
    • 1.66.1
    • 1.66.2
    • 1.66.6
    • 1.66.7
    • 1.66.8
    • 1.66.9
    • 1.66.11
    • 1.66.12
    • 1.66.14
    • 1.66.15
    • 1.66.16
    • 1.66.17
    • 1.66.18
    • 1.66.19
    • 1.66.20
    • 1.66.21
    • 1.66.22
    • 1.66.23
    Intervalos de versiones afectados
    • ECOSYSTEM: < 1.66.26

    Actualiza a 1.66.26

  • grub2-unsigned Ubuntu:16.04:LTS

    Versiones
    • 2.04-1ubuntu44
    • 2.04-1ubuntu44.1
    • 2.04-1ubuntu44.1.2
    Intervalos de versiones afectados
    • ECOSYSTEM: (−∞, +∞)

    Sin corrección publicada

  • grub2 Ubuntu:18.04:LTS

    Versiones
    • 2.02~beta3-4ubuntu7
    • 2.02-2ubuntu1
    • 2.02-2ubuntu2
    • 2.02-2ubuntu4
    • 2.02-2ubuntu6
    • 2.02-2ubuntu7
    • 2.02-2ubuntu8
    • 2.02-2ubuntu8.1
    • 2.02-2ubuntu8.2
    • 2.02-2ubuntu8.3
    • 2.02-2ubuntu8.4
    • 2.02-2ubuntu8.6
    • 2.02-2ubuntu8.7
    • 2.02-2ubuntu8.9
    • 2.02-2ubuntu8.10
    • 2.02-2ubuntu8.12
    • 2.02-2ubuntu8.13
    • 2.02-2ubuntu8.14
    • 2.02-2ubuntu8.15
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.02-2ubuntu8.16

    Actualiza a 2.02-2ubuntu8.16

  • grub2-signed Ubuntu:18.04:LTS

    Versiones
    • 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
    Intervalos de versiones afectados
    • ECOSYSTEM: < 1.93.18

    Actualiza a 1.93.18

  • grub2 Ubuntu:20.04:LTS

    Versiones
    • 2.04-1ubuntu12
    • 2.04-1ubuntu13
    • 2.04-1ubuntu14
    • 2.04-1ubuntu16
    • 2.04-1ubuntu18
    • 2.04-1ubuntu20
    • 2.04-1ubuntu21
    • 2.04-1ubuntu22
    • 2.04-1ubuntu23
    • 2.04-1ubuntu24
    • 2.04-1ubuntu25
    • 2.04-1ubuntu26
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.04-1ubuntu26.1

    Actualiza a 2.04-1ubuntu26.1

  • grub2-signed Ubuntu:20.04:LTS

    Versiones
    • 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
    Intervalos de versiones afectados
    • ECOSYSTEM: < 1.142.3

    Actualiza a 1.142.3

Fuentes originales

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