Buffer overflow in Gnu Grub2
CVE-2023-4692
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 m…
Vulnerability class: Buffer Overflow
EPSS: 0.005 (41.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Gnu Grub2
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8 — versions 1:2.02-156.el8
- Red Hat Enterprise Linux 9 — versions 1:2.06-77.el9
- Redhat Enterprise_linux — versions 8.0, 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, Third Party Advisory, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Third Party Advisory, Issue Tracking)
- secalert@redhat.com (Exploit, Third Party Advisory)
- secalert@redhat.com (Mailing List)
- secalert@redhat.com (Mailing List, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-4692?
- CVE-2023-4692 is a high-severity vulnerability in Gnu Grub2, classified under Heap-based Buffer Overflow. CVSS score: 7.5/10. Published 2023-10-25.
- How severe is CVE-2023-4692?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2023-4692 known to be exploited?
- 11 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.