Description
An out-of-bounds write flaw was found in grub2's NTFS filesystem driver. This issue may allow an attacker to present a specially crafted NTFS filesystem image, leading to grub's heap metadata corruption. In some circumstances, the attack may also corrupt the UEFI firmware heap metadata. As a result, arbitrary code execution and secure boot protection bypass may be achieved.
CVSS breakdown
CVSS 3.1
Attack Vector
Local
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected products
- gnu / grub22.12
- RedHat / enterprise_linux8.0 – 8.0
- RedHat / enterprise_linux9.0 – 9.0
References
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2024:2456
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2024:3184
- VENDOR_ADVISORYhttps://access.redhat.com/security/cve/CVE-2023-4692
- MISChttps://bugzilla.redhat.com/show_bug.cgi?id=2236613
- MISChttps://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager/
- MAILING_LISThttps://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.html
- MAILING_LISThttps://seclists.org/oss-sec/2023/q4/37
Updated 38m ago · 8 sources