6.4

CVE-2020-15705

GRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot without shim

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Gnu ≫ Grub2 Version <= 2.04
Canonical ≫ Ubuntu Linux Version 14.04 SwEdition esm
Canonical ≫ Ubuntu Linux Version 16.04 SwEdition lts
Canonical ≫ Ubuntu Linux Version 18.04 SwEdition lts
Canonical ≫ Ubuntu Linux Version 20.04 SwEdition lts
Debian ≫ Debian Linux Version 10.0
Opensuse ≫ Leap Version 15.1
Opensuse ≫ Leap Version 15.2
Redhat ≫ Enterprise Linux Version 7.0
Redhat ≫ Enterprise Linux Version 8.0
Microsoft ≫ Windows 10 Version -
Microsoft ≫ Windows 10 Version 1607
Microsoft ≫ Windows 10 Version 1709
Microsoft ≫ Windows 10 Version 1803
Microsoft ≫ Windows 10 Version 1809
Microsoft ≫ Windows 10 Version 1903
Microsoft ≫ Windows 10 Version 1909
Microsoft ≫ Windows 10 Version 2004
Microsoft ≫ Windows 8.1 Version -
Microsoft ≫ Windows Rt 8.1 Version -
Microsoft ≫ Windows Server 2016 Version 1903
Microsoft ≫ Windows Server 2016 Version 1909
Microsoft ≫ Windows Server 2016 Version 2004
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 1.39% 0.693
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 6.4 0.5 5.9
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
NIST 4.4 3.4 6.4
AV:L/AC:M/Au:N/C:P/I:P/A:P
Canonical 6.4 0.5 5.9
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE-347 Improper Verification of Cryptographic Signature

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

http://www.openwall.com/lists/oss-security/2020/07/29/3
Third Party Advisory
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00067.html
Third Party Advisory
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00069.html
Third Party Advisory
Mailing List
http://ubuntu.com/security/notices/USN-4432-1
Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/03/02/3
Third Party Advisory
Mailing List
http://www.openwall.com/lists/oss-security/2021/09/17/2
Third Party Advisory
Mailing List
http://www.openwall.com/lists/oss-security/2021/09/17/4
Third Party Advisory
Mailing List
http://www.openwall.com/lists/oss-security/2021/09/21/1
Third Party Advisory
Mailing List
https://access.redhat.com/security/vulnerabilities/grub2bootloader
Third Party Advisory
https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html
Vendor Advisory
Issue Tracking
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011
Patch
Third Party Advisory
Vendor Advisory
https://security.gentoo.org/glsa/202104-05
Third Party Advisory
https://security.netapp.com/advisory/ntap-20200731-0008/
Third Party Advisory
https://usn.ubuntu.com/4432-1/
Third Party Advisory
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass
Third Party Advisory
https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot
Third Party Advisory
https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/
Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/07/29/3
Third Party Advisory
Mailing List
https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/
Third Party Advisory
https://www.suse.com/support/kb/doc/?id=000019673
Third Party Advisory