CVE-2023-4692
Grub2: out-of-bounds write at fs/ntfs.c may lead to unsigned code execution
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
1Exploited in Wild
-Decision
Descriptions
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.
Se encontró una falla de escritura fuera de los límites en el controlador del sistema de archivos NTFS de grub2. Este problema puede permitir que un atacante presente una imagen del sistema de archivos NTFS especialmente manipulada, lo que provoca la corrupción de los metadatos del montón de grub. En algunas circunstancias, el ataque también puede dañar los metadatos del montón del firmware UEFI. Como resultado, se puede lograr la ejecución de código arbitrario y eludir la protección de arranque seguro.
It was discovered that a specially crafted file system image could cause a heap-based out-of-bounds write. A local attacker could potentially use this to perform arbitrary code execution bypass and bypass secure boot protections. It was discovered that a specially crafted file system image could cause an out-of-bounds read. A physically-present attacker could possibly use this to leak sensitive information to the GRUB pager.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2023-08-31 CVE Reserved
- 2023-10-04 CVE Published
- 2024-11-23 CVE Updated
- 2024-11-23 First Exploit
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-122: Heap-based Buffer Overflow
- CWE-787: Out-of-bounds Write
CAPEC
References (12)
URL | Date | SRC |
---|---|---|
https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager | 2024-11-23 |
URL | Date | SRC |
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URL | Date | SRC |
---|---|---|
https://access.redhat.com/errata/RHSA-2024:2456 | 2024-05-22 | |
https://access.redhat.com/errata/RHSA-2024:3184 | 2024-05-22 | |
https://access.redhat.com/security/cve/CVE-2023-4692 | 2024-05-22 | |
https://bugzilla.redhat.com/show_bug.cgi?id=2236613 | 2024-05-22 |
Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
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Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Gnu Search vendor "Gnu" | Grub2 Search vendor "Gnu" for product "Grub2" | < 2.12 Search vendor "Gnu" for product "Grub2" and version " < 2.12" | - |
Affected
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Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Affected
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Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 9.0 Search vendor "Redhat" for product "Enterprise Linux" and version "9.0" | - |
Affected
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