CVE-2020-15705
CVE-2020-15705 · GRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot without shim
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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 · Mittel · EPSS 1,4% · Korrektur verfügbar
- Veröffentlicht
- Aktualisiert
Technologie-Stack: system
Betroffene Produkte und Versionen
grub2 in ubuntu
- Softwareversionen
- ≥ 20.04 LTS, < 2.04-1ubuntu26.1: Betroffen (custom)
- ≥ 18.04 LTS, < 2.02-2ubuntu8.16: Betroffen (custom)
- ≥ 16.04 LTS, < 2.02~beta2-36ubuntu3.26: Betroffen (custom)
- ≥ 14.04 ESM, < 2.02~beta2-9ubuntu1.20: Betroffen (custom)
Keine Korrektur veröffentlicht
grub2 Ubuntu:Pro:14.04:LTS
- Softwareversionen
- 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
- Betroffene Versionsbereiche
- ECOSYSTEM: < 2.02~beta2-9ubuntu1.20
Auf 2.02~beta2-9ubuntu1.20 aktualisieren
grub2-signed Ubuntu:Pro:14.04:LTS
- Softwareversionen
- 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
- Betroffene Versionsbereiche
- ECOSYSTEM: < 1.34.22
Auf 1.34.22 aktualisieren
grub2 Ubuntu:16.04:LTS
- Softwareversionen
- 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
- Betroffene Versionsbereiche
- ECOSYSTEM: < 2.02~beta2-36ubuntu3.26
Auf 2.02~beta2-36ubuntu3.26 aktualisieren
grub2-signed Ubuntu:16.04:LTS
- Softwareversionen
- 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
- Betroffene Versionsbereiche
- ECOSYSTEM: < 1.66.26
Auf 1.66.26 aktualisieren
grub2-unsigned Ubuntu:16.04:LTS
- Softwareversionen
- 2.04-1ubuntu44
- 2.04-1ubuntu44.1
- 2.04-1ubuntu44.1.2
- Betroffene Versionsbereiche
- ECOSYSTEM: (−∞, +∞)
Keine Korrektur veröffentlicht
grub2 Ubuntu:18.04:LTS
- Softwareversionen
- 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
- Betroffene Versionsbereiche
- ECOSYSTEM: < 2.02-2ubuntu8.16
Auf 2.02-2ubuntu8.16 aktualisieren
grub2-signed Ubuntu:18.04:LTS
- Softwareversionen
- 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
- Betroffene Versionsbereiche
- ECOSYSTEM: < 1.93.18
Auf 1.93.18 aktualisieren
grub2 Ubuntu:20.04:LTS
- Softwareversionen
- 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
- Betroffene Versionsbereiche
- ECOSYSTEM: < 2.04-1ubuntu26.1
Auf 2.04-1ubuntu26.1 aktualisieren
grub2-signed Ubuntu:20.04:LTS
- Softwareversionen
- 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
- Betroffene Versionsbereiche
- ECOSYSTEM: < 1.142.3
Auf 1.142.3 aktualisieren
Originalquellen
- https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/
- https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass
- http://ubuntu.com/security/notices/USN-4432-1
- https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011
- https://access.redhat.com/security/vulnerabilities/grub2bootloader
- https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/
- https://www.suse.com/support/kb/doc/?id=000019673
- https://www.openwall.com/lists/oss-security/2020/07/29/3
- https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html
- http://www.openwall.com/lists/oss-security/2020/07/29/3
- https://security.netapp.com/advisory/ntap-20200731-0008/
- https://usn.ubuntu.com/4432-1/
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00067.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00069.html
- http://www.openwall.com/lists/oss-security/2021/03/02/3
- https://security.gentoo.org/glsa/202104-05
- http://www.openwall.com/lists/oss-security/2021/09/17/2
- http://www.openwall.com/lists/oss-security/2021/09/17/4
- http://www.openwall.com/lists/oss-security/2021/09/21/1
- https://nvd.nist.gov/vuln/detail/CVE-2020-15705