CVE-2020-15705

CVSS V2 Medium 4.4 CVSS V3 Medium 6.4
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.
Overview
  • CVE ID
  • CVE-2020-15705
  • Assigner
  • security@ubuntu.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2020-07-29T18:15:14
  • Last Modified Date
  • 2022-04-18T15:22:21
Weakness Enumerations
CWE URL
CWE-347 http://cwe.mitre.org/data/definitions/347.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:* 1 OR 2.04
cpe:2.3:a:redhat:enterprise_linux_atomic_host:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:suse:suse_linux_enterprise_server:11:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:suse:suse_linux_enterprise_server:12:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:suse:suse_linux_enterprise_server:15:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:microsoft:windows_10:1709:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:microsoft:windows_10:1803:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:microsoft:windows_10:1903:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:microsoft:windows_server_2016:1903:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:M/Au:N/C:P/I:P/A:P
  • Access Vector
  • LOCAL
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • PARTIAL
  • Base Score
  • 4.4
  • Severity
  • MEDIUM
  • Exploitability Score
  • 3.4
  • Impact Score
  • 6.4
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • HIGH
  • Privileges Required
  • HIGH
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 6.4
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 0.5
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://www.suse.com/support/kb/doc/?id=000019673 Third Party Advisory
http://ubuntu.com/security/notices/USN-4432-1 Third Party Advisory
https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html Issue Tracking Vendor Advisory
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass Third Party Advisory
https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot Third Party Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011 Patch Third Party Advisory Vendor Advisory
https://access.redhat.com/security/vulnerabilities/grub2bootloader Third Party Advisory
https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/ Third Party Advisory
https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/ Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/07/29/3 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/07/29/3 Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20200731-0008/ Third Party Advisory
https://usn.ubuntu.com/4432-1/ Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00067.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00069.html Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/03/02/3 Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202104-05 Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/17/2 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/17/4 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/21/1 Mailing List Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2020-15705
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15705
History
Created Old Value New Value Data Type Notes
2022-05-10 15:42:17 Added to TrackCVE
2022-12-04 20:25:03 2020-07-29T18:15Z 2020-07-29T18:15:14 CVE Published Date updated
2022-12-04 20:25:03 2022-04-18T15:22:21 CVE Modified Date updated
2022-12-04 20:25:03 Analyzed Vulnerability Status updated