CVE-2020-15705
Detail
Modified After Enrichment This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
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.
Metrics
CVSS Version 4.0
CVSS Version 3.x
CVSS Version 2.0
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 Severity and Vector Strings:
Vector:
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
References to Advisories, Solutions, and Tools
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URL
Source(s)
Tag(s)
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00067.html
CVE, Canonical Ltd.
Mailing List
Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00069.html
CVE, Canonical Ltd.
Mailing List
Third Party Advisory
http://ubuntu.com/security/notices/USN-4432-1
CVE, Canonical Ltd.
Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/07/29/3
CVE, Canonical Ltd.
Mailing List
Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/03/02/3
CVE, Canonical Ltd.
Mailing List
Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/17/2
CVE, Canonical Ltd.
Mailing List
Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/17/4
CVE, Canonical Ltd.
Mailing List
Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/21/1
CVE, Canonical Ltd.
Mailing List
Third Party Advisory
https://access.redhat.com/security/vulnerabilities/grub2bootloader
CVE, Canonical Ltd.
Third Party Advisory
https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html
CVE, Canonical Ltd.
Issue Tracking
Vendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011
CVE, Canonical Ltd.
Patch
Third Party Advisory
Vendor Advisory
https://security.gentoo.org/glsa/202104-05
CVE, Canonical Ltd.
Third Party Advisory
https://security.netapp.com/advisory/ntap-20200731-0008/
CVE, Canonical Ltd.
Third Party Advisory
https://usn.ubuntu.com/4432-1/
CVE, Canonical Ltd.
Third Party Advisory
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass
CVE, Canonical Ltd.
Third Party Advisory
https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot
CVE, Canonical Ltd.
Third Party Advisory
https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/
CVE, Canonical Ltd.
Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/07/29/3
CVE, Canonical Ltd.
Mailing List
Third Party Advisory
https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/
CVE, Canonical Ltd.
Third Party Advisory
https://www.suse.com/support/kb/doc/?id=000019673
CVE, Canonical Ltd.
Third Party Advisory
Weakness Enumeration
CWE-ID
CWE Name
Source
CWE-347
Improper Verification of Cryptographic Signature
NIST  
Canonical Ltd.  
Change History
16 change records found show changes
CVE Modified by Canonical Ltd.
6/16/2026 10:57:05 PM
Action
Type
Old Value
New Value
Added
Affected
[{"vendor":"Ubuntu","product":"grub2 in Ubuntu","versions":[{"version":"20.04 LTS","lessThan":"2.04-1ubuntu26.1","versionType":"custom","status":"affected"},{"version":"18.04 LTS","lessThan":"2.02-2ubuntu8.16","versionType":"custom","status":"affected"},{"version":"16.04 LTS","lessThan":"2.02~beta2-36ubuntu3.26","versionType":"custom","status":"affected"},{"version":"14.04 ESM","lessThan":"2.02~beta2-9ubuntu1.20","versionType":"custom","status":"affected"}]}]
CVE Modified by CVE
11/21/2024 12:06:03 AM
Action
Type
Old Value
New Value
Added
Reference
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00067.html
Added
Reference
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00069.html
Added
Reference
http://ubuntu.com/security/notices/USN-4432-1
Added
Reference
http://www.openwall.com/lists/oss-security/2020/07/29/3
Added
Reference
http://www.openwall.com/lists/oss-security/2021/03/02/3
Added
Reference
http://www.openwall.com/lists/oss-security/2021/09/17/2
Added
Reference
http://www.openwall.com/lists/oss-security/2021/09/17/4
Added
Reference
http://www.openwall.com/lists/oss-security/2021/09/21/1
Added
Reference
https://access.redhat.com/security/vulnerabilities/grub2bootloader
Added
Reference
https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html
Added
Reference
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011
Added
Reference
https://security.gentoo.org/glsa/202104-05
Added
Reference
https://security.netapp.com/advisory/ntap-20200731-0008/
Added
Reference
https://usn.ubuntu.com/4432-1/
Added
Reference
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass
Added
Reference
https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot
Added
Reference
https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/
Added
Reference
https://www.openwall.com/lists/oss-security/2020/07/29/3
Added
Reference
https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/
Added
Reference
https://www.suse.com/support/kb/doc/?id=000019673
CVE Modified by Canonical Ltd.
5/14/2024 2:30:51 AM
Action
Type
Old Value
New Value
Modified Analysis by NIST
4/18/2022 11:22:21 AM
Action
Type
Old Value
New Value
Changed
Reference Type
http://www.openwall.com/lists/oss-security/2021/09/17/2 No Types Assigned
http://www.openwall.com/lists/oss-security/2021/09/17/2 Mailing List, Third Party Advisory
Changed
Reference Type
http://www.openwall.com/lists/oss-security/2021/09/17/4 No Types Assigned
http://www.openwall.com/lists/oss-security/2021/09/17/4 Mailing List, Third Party Advisory
Changed
Reference Type
http://www.openwall.com/lists/oss-security/2021/09/21/1 No Types Assigned
http://www.openwall.com/lists/oss-security/2021/09/21/1 Mailing List, Third Party Advisory
Changed
Reference Type
https://security.gentoo.org/glsa/202104-05 No Types Assigned
https://security.gentoo.org/glsa/202104-05 Third Party Advisory
CVE Modified by Canonical Ltd.
9/21/2021 8:15:08 AM
Action
Type
Old Value
New Value
Added
Reference
http://www.openwall.com/lists/oss-security/2021/09/21/1 [No Types Assigned]
CVE Modified by Canonical Ltd.
9/17/2021 2:15:08 PM
Action
Type
Old Value
New Value
Added
Reference
http://www.openwall.com/lists/oss-security/2021/09/17/4 [No Types Assigned]
CVE Modified by Canonical Ltd.
9/17/2021 5:15:08 AM
Action
Type
Old Value
New Value
Added
Reference
http://www.openwall.com/lists/oss-security/2021/09/17/2 [No Types Assigned]
CVE Modified by Canonical Ltd.
4/30/2021 10:15:08 PM
Action
Type
Old Value
New Value
Added
Reference
https://security.gentoo.org/glsa/202104-05 [No Types Assigned]
Modified Analysis by NIST
3/17/2021 10:36:43 AM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:redhat:enterprise_linux_atomic_host:-:*:*:*:*:*:*:*
*cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
*cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
*cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
*cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
*cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
*cpe:2.3:o:suse:suse_linux_enterprise_server:11:*:*:*:*:*:*:*
*cpe:2.3:o:suse:suse_linux_enterprise_server:12:*:*:*:*:*:*:*
*cpe:2.3:o:suse:suse_linux_enterprise_server:15:*:*:*:*:*:*:*
OR
*cpe:2.3:a:redhat:enterprise_linux_atomic_host:-:*:*:*:*:*:*:*
*cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
*cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
*cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
*cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
*cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
*cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
*cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
*cpe:2.3:o:suse:suse_linux_enterprise_server:11:*:*:*:*:*:*:*
*cpe:2.3:o:suse:suse_linux_enterprise_server:12:*:*:*:*:*:*:*
*cpe:2.3:o:suse:suse_linux_enterprise_server:15:*:*:*:*:*:*:*
Changed
Reference Type
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00067.html No Types Assigned
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00067.html Mailing List, Third Party Advisory
Changed
Reference Type
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00069.html No Types Assigned
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00069.html Mailing List, Third Party Advisory
Changed
Reference Type
http://www.openwall.com/lists/oss-security/2021/03/02/3 No Types Assigned
http://www.openwall.com/lists/oss-security/2021/03/02/3 Mailing List, Third Party Advisory
Changed
Reference Type
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011 Third Party Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011 Patch, Third Party Advisory, Vendor Advisory
Changed
Reference Type
https://usn.ubuntu.com/4432-1/ No Types Assigned
https://usn.ubuntu.com/4432-1/ Third Party Advisory
CVE Modified by Canonical Ltd.
3/02/2021 5:15:13 PM
Action
Type
Old Value
New Value
Added
Reference
http://www.openwall.com/lists/oss-security/2021/03/02/3 [No Types Assigned]
CVE Modified by Canonical Ltd.
8/29/2020 2:15:10 PM
Action
Type
Old Value
New Value
Added
Reference
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00067.html [No Types Assigned]
Added
Reference
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00069.html [No Types Assigned]
CPE Deprecation Remap by NIST
8/18/2020 11:05:57 AM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:o:debian:debian_linux:10:*:*:*:*:*:*:*
OR
*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
CVE Modified by Canonical Ltd.
8/04/2020 5:15:15 PM
Action
Type
Old Value
New Value
Added
Reference
https://usn.ubuntu.com/4432-1/ [No Types Assigned]
Initial Analysis by NIST
8/03/2020 1:08:31 PM
Action
Type
Old Value
New Value
Added
CVSS V3.1
NIST AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Added
CVSS V2
NIST (AV:L/AC:M/Au:N/C:P/I:P/A:P)
Added
CWE
NIST CWE-347
Added
CPE Configuration
OR
*cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:* versions up to (including) 2.04
Added
CPE Configuration
OR
*cpe:2.3:a:redhat:enterprise_linux_atomic_host:-:*:*:*:*:*:*:*
*cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
*cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
*cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
*cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
*cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
*cpe:2.3:o:debian:debian_linux:10:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
*cpe:2.3:o:suse:suse_linux_enterprise_server:11:*:*:*:*:*:*:*
*cpe:2.3:o:suse:suse_linux_enterprise_server:12:*:*:*:*:*:*:*
*cpe:2.3:o:suse:suse_linux_enterprise_server:15:*:*:*:*:*:*:*
Added
CPE Configuration
OR
*cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:*
*cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:*
*cpe:2.3:o:microsoft:windows_10:1709:*:*:*:*:*:*:*
*cpe:2.3:o:microsoft:windows_10:1803:*:*:*:*:*:*:*
*cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:*
*cpe:2.3:o:microsoft:windows_10:1903:*:*:*:*:*:*:*
*cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:*
*cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:*
*cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*
*cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*
*cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
*cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
*cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
*cpe:2.3:o:microsoft:windows_server_2016:1903:*:*:*:*:*:*:*
*cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:*
*cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:*
*cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
Changed
Reference Type
http://ubuntu.com/security/notices/USN-4432-1 No Types Assigned
http://ubuntu.com/security/notices/USN-4432-1 Third Party Advisory
Changed
Reference Type
http://www.openwall.com/lists/oss-security/2020/07/29/3 No Types Assigned
http://www.openwall.com/lists/oss-security/2020/07/29/3 Mailing List, Third Party Advisory
Changed
Reference Type
https://access.redhat.com/security/vulnerabilities/grub2bootloader No Types Assigned
https://access.redhat.com/security/vulnerabilities/grub2bootloader Third Party Advisory
Changed
Reference Type
https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html No Types Assigned
https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html Issue Tracking, Vendor Advisory
Changed
Reference Type
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011 No Types Assigned
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011 Third Party Advisory
Changed
Reference Type
https://security.netapp.com/advisory/ntap-20200731-0008/ No Types Assigned
https://security.netapp.com/advisory/ntap-20200731-0008/ Third Party Advisory
Changed
Reference Type
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass No Types Assigned
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass Third Party Advisory
Changed
Reference Type
https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot No Types Assigned
https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot Third Party Advisory
Changed
Reference Type
https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/ No Types Assigned
https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/ Third Party Advisory
Changed
Reference Type
https://www.openwall.com/lists/oss-security/2020/07/29/3 No Types Assigned
https://www.openwall.com/lists/oss-security/2020/07/29/3 Mailing List, Third Party Advisory
Changed
Reference Type
https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/ No Types Assigned
https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/ Third Party Advisory
Changed
Reference Type
https://www.suse.com/support/kb/doc/?id=000019673 No Types Assigned
https://www.suse.com/support/kb/doc/?id=000019673 Third Party Advisory
CVE Modified by Canonical Ltd.
7/31/2020 10:15:12 AM
Action
Type
Old Value
New Value
Added
Reference
https://security.netapp.com/advisory/ntap-20200731-0008/ [No Types Assigned]
CVE Modified by Canonical Ltd.
7/29/2020 5:15:13 PM
Action
Type
Old Value
New Value
Added
Reference
http://www.openwall.com/lists/oss-security/2020/07/29/3 [No Types Assigned]
Quick Info
CVE Dictionary Entry: CVE-2020-15705 NVD
Published Date: 07/29/2020 NVD
Last Modified: 06/16/2026
Source: Canonical Ltd.
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