Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Grub2 | < 2.12 |
| Redhat | Enterprise Linux | 8.0 |
Related Weaknesses (CWE)
References
- https://access.redhat.com/errata/RHSA-2024:2456
- https://access.redhat.com/errata/RHSA-2024:3184
- https://access.redhat.com/security/cve/CVE-2023-4692Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2236613Issue TrackingThird Party Advisory
- https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grExploitThird Party Advisory
- https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.htmlMailing List
- https://seclists.org/oss-sec/2023/q4/37Mailing ListThird Party Advisory
- https://access.redhat.com/errata/RHSA-2024:2456
- https://access.redhat.com/errata/RHSA-2024:3184
- https://access.redhat.com/security/cve/CVE-2023-4692Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2236613Issue TrackingThird Party Advisory
- https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/10/msg00007.html
- https://lists.fedoraproject.org/archives/list/[email protected]
- https://lists.fedoraproject.org/archives/list/[email protected]
FAQ
What is CVE-2023-4692?
CVE-2023-4692 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 corrupti...
How severe is CVE-2023-4692?
CVE-2023-4692 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-4692?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Grub2, Redhat Enterprise Linux.