Vulnerability Details : 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 may also corrupt the UEFI firmware heap metadata. As a result, arbitrary code execution and secure boot protection bypass may be achieved.
Products affected by CVE-2023-4692
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-4692
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-4692
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H |
0.8
|
6.0
|
Red Hat, Inc. | 2024-01-03 |
|
5.3
|
MEDIUM | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N |
0.8
|
4.0
|
Red Hat, Inc. | |
|
5.3
|
MEDIUM | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N |
N/A
|
N/A
|
RedHat-CVE-2023-4692 |
CWE ids for CVE-2023-4692
-
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().Assigned by: secalert@redhat.com (Secondary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2023-4692
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OIRJ5UZRXX2KLR4IKBJEQUNGOCXMMDLY/
[SECURITY] Fedora 40 Update: grub2-2.06-121.fc40 - package-announce - Fedora Mailing-Lists
-
https://access.redhat.com/security/cve/CVE-2023-4692
CVE-2023-4692- Red Hat Customer PortalThird Party Advisory
-
https://access.redhat.com/errata/RHSA-2024:3184
RHSA-2024:3184 - Security Advisory - Red Hat Customer Portal
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https://security.gentoo.org/glsa/202311-14
GRUB: Multiple Vulnerabilities (GLSA 202311-14) — Gentoo securityThird Party Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=2236613
2236613 – (CVE-2023-4692) CVE-2023-4692 grub2: Out-of-bounds write at fs/ntfs.c may lead to unsigned code executionIssue Tracking;Third Party Advisory
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https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.html
[SECURITY PATCH 0/6] GRUB2 NTFS driver vulnerabilities - 2023/10/03Mailing List
-
https://security.netapp.com/advisory/ntap-20231208-0002/
October 2023 Grub Vulnerabilities in NetApp Products | NetApp Product SecurityThird Party Advisory
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https://seclists.org/oss-sec/2023/q4/37
oss-sec: CVE-2023-4692, CVE-2023-4693: grub2: OOB write, read via specially crafted NTFS filesystemMailing List;Third Party Advisory
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https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PERFILCHFEUGG3OAMC6W55P6DDIBZK4Q/
[SECURITY] Fedora 38 Update: grub2-2.06-118.fc38 - package-announce - Fedora Mailing-Lists
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https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager/
CVE-2023-4692, CVE-2023-4693: vulnerabilities in the GRUB boot manager – My DFIR BlogExploit;Third Party Advisory
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https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FUU42E7CPYLATXOYVYNW6YTXXULAOV6L/
[SECURITY] Fedora 39 Update: grub2-2.06-120.fc39 - package-announce - Fedora Mailing-Lists
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https://access.redhat.com/errata/RHSA-2024:2456
RHSA-2024:2456 - Security Advisory - Red Hat Customer Portal
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