CVE-2020-15706

MEDIUMMonitor

Published:Jul 29, 2020(5 years ago)

Modified:Nov 21, 2024

Local AccessNo Interaction

Vulnerability 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.

Attack Characteristics

Local AccessHigh ComplexityHigh PrivilegesNo User Interaction

🤖

AI analysis not yet available

Plain-English explanation, risk summary, and remediation steps will appear here once AI analysis is complete.

No Fix Known

No patch has been released yet. Apply workarounds or mitigations where available.

Affected Software

Vendor	Product	Versions	Fixed In
gnu	grub2	2.04	-
redhat	enterprise_linux_atomic_host	-	-
redhat	openshift_container_platform

Timeline

Published
CVE disclosed publicly
Jul 29, 20205 years ago
Last Modified
Most recent update
Nov 21, 20241 year ago
Indexed to CVEInsight
Added to this platform
Mar 29, 20261 month ago

References

http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016....Broken Link
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017....Broken Link
http://ubuntu.com/security/notices/USN-4432-1Third Party Advisory

CVSS Score

v3.1

6.4/ 10.0

MEDIUM

AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

At a Glance

Affected Products

References

gnu / grub2

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

https://access.redhat.com/security/vulnerabilities/grub2bootloaderThird Party Advisory

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

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

https://security.gentoo.org/glsa/202104-05Third 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/GRUB2SecureBootBypa...Third Party Advisory

https://www.debian.org/security/2020-GRUB-UEFI-SecureBootThird Party Advisory

https://www.debian.org/security/2020/dsa-4735Third 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/2020/07/29/3Mailing List

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

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

http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016....Broken Link

http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017....Broken Link

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

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

https://access.redhat.com/security/vulnerabilities/grub2bootloaderThird Party Advisory

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

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

https://security.gentoo.org/glsa/202104-05Third 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/GRUB2SecureBootBypa...Third Party Advisory

https://www.debian.org/security/2020-GRUB-UEFI-SecureBootThird Party Advisory

https://www.debian.org/security/2020/dsa-4735Third 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/2020/07/29/3Mailing List

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

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

CVSS v3 Vector

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredHigh

User InteractionNone

Impact

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

Impact Analysis

ConfidentialityHigh

NoneLowHigh

IntegrityHigh

NoneLowHigh

AvailabilityHigh

NoneLowHigh

CVE-2020-15706

✦ Vulnerability Description

Attack Characteristics

Affected Software

Timeline

References

CVSS Score

At a Glance

Official Sources

CVSS v3 Vector

Impact Analysis

Vulnerability Description