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CVE-2020-15707

GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.

Published: Jul 29, 2020Updated: Nov 21, 2024 Sources: CVE List NVD BDU csafCWE-362
NVD MITRE
5.7CVSSMEDIUM
EPSS Score
1.6%
Top 27.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:LAC:HPR:HUI:NS:UC:NI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-362CWE-190

Affected Products

Windows 8.1Microsoft Corp
On-premOS
Operating Systems / windows
Windows Server 2012Microsoft Corp
On-premOS
Operating Systems / windows
Windows Server 2012 R2Microsoft Corp
On-premOS
Operating Systems / windows
Windows RT 8.1Microsoft Corp
On-premOS
Operating Systems / windows
Windows 10Microsoft Corp
On-premOS
Operating Systems / windows
microsoft corpcommercialUSOperating Systemsaka microsoft corporation
and 41 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://access.redhat.com/security/cve/CVE-2020-15707
access.redhat.com
https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html
lists.gnu.org
https://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
lists.opensuse.org
and 63 more references View all →

Timeline

Published
Jul 29, 2020
Last Updated
Nov 21, 2024

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