CVE-2020-15707

MEDIUMMonitor

Published:Jul 29, 2020(5 years ago)

Modified:Nov 21, 2024

Local AccessNo Interaction

Vulnerability Description

Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. 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....Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017....Mailing List
http://ubuntu.com/security/notices/USN-4432-1Third Party Advisory

CVSS Score

v3.1

5.7/ 10.0

MEDIUM

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

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....Mailing List

http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017....Mailing List

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/Exploit

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:N/I:H/A:H

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredHigh

User InteractionNone

Impact

ScopeUnchanged

ConfidentialityNone

IntegrityHigh

AvailabilityHigh

Impact Analysis

ConfidentialityNone

NoneLowHigh

IntegrityHigh

NoneLowHigh

AvailabilityHigh

NoneLowHigh

CVE-2020-15707

✦ Vulnerability Description

Attack Characteristics

Affected Software

Timeline

References

CVSS Score

At a Glance

Official Sources

CVSS v3 Vector

Impact Analysis

Vulnerability Description