CVE-2020-15706

CVSS V2 Medium 4.4 CVSS V3 Medium 6.4
Description
GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.
Overview
  • CVE ID
  • CVE-2020-15706
  • Assigner
  • security@ubuntu.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2020-07-29T18:15:14
  • Last Modified Date
  • 2022-11-16T03:58:50
Weakness Enumerations
CWE URL
CWE-362 http://cwe.mitre.org/data/definitions/362.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: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
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* 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
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 Third Party 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
https://www.debian.org/security/2020/dsa-4735 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/
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
https://security.gentoo.org/glsa/202104-05
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2020-15706
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15706
History
Created Old Value New Value Data Type Notes
2022-05-10 07:13:32 Added to TrackCVE
2022-12-04 20:25:07 2020-07-29T18:15Z 2020-07-29T18:15:14 CVE Published Date updated
2022-12-04 20:25:07 2022-11-16T03:58:50 CVE Modified Date updated
2022-12-04 20:25:07 Analyzed Vulnerability Status updated