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CVE-2023-4692

Date: October 25, 2023

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.

Language: C

Severity Score

Related Resources (15)

https://bugzilla.redhat.com/show_bug.cgi?id=2236613
https://security.netapp.com/advisory/ntap-20231208-0002/
https://access.redhat.com/errata/RHSA-2024:3184
https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FUU42E7CPYLATXOYVYNW6YTXXULAOV6L/
https://seclists.org/oss-sec/2023/q4/37
https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager/
https://security-tracker.debian.org/tracker/CVE-2023-4692
https://access.redhat.com/security/cve/CVE-2023-4692
https://security.gentoo.org/glsa/202311-14
https://nvd.nist.gov/vuln/detail/CVE-2023-4692
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OIRJ5UZRXX2KLR4IKBJEQUNGOCXMMDLY/
https://access.redhat.com/errata/RHSA-2024:2456
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PERFILCHFEUGG3OAMC6W55P6DDIBZK4Q/
https://www.mend.io/vulnerability-database/CVE-2023-4692

Severity Score

Weakness Type (CWE)

Out-of-bounds Write

CWE-787

Heap-based Buffer Overflow

CWE-122

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): HIGH
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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