CVE-2020-15705

Description

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.

References

https://www.tenable.com/blog/cve-2020-10713-boothole-grub2-bootloader-arbitrary-code-execution-vulnerability

https://www.suse.com/support/kb/doc/?id=000019673

https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/

https://www.openwall.com/lists/oss-security/2020/07/29/3

https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/

https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot

https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass

https://usn.ubuntu.com/4432-1/

https://security.netapp.com/advisory/ntap-20200731-0008/

https://security.gentoo.org/glsa/202104-05

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011

https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html

https://access.redhat.com/security/vulnerabilities/grub2bootloader

http://www.openwall.com/lists/oss-security/2021/09/21/1

http://www.openwall.com/lists/oss-security/2021/09/17/4

http://www.openwall.com/lists/oss-security/2021/09/17/2

http://www.openwall.com/lists/oss-security/2021/03/02/3

http://www.openwall.com/lists/oss-security/2020/07/29/3

http://ubuntu.com/security/notices/USN-4432-1

http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00069.html

http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00067.html

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3