FKIE_CVE-2023-4692

Vulnerability from fkie_nvd - Published: 2023-10-25 18:17 - Updated: 2025-11-04 20:17
Severity ?
7.5 (High) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2024:2456
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2024:3184
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2023-4692Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2236613Issue Tracking, Third Party Advisory
secalert@redhat.comhttps://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager/Exploit, Third Party Advisory
secalert@redhat.comhttps://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.htmlMailing List
secalert@redhat.comhttps://seclists.org/oss-sec/2023/q4/37Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2024:2456
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2024:3184
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/security/cve/CVE-2023-4692Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=2236613Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager/Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/10/msg00007.html
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FUU42E7CPYLATXOYVYNW6YTXXULAOV6L/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OIRJ5UZRXX2KLR4IKBJEQUNGOCXMMDLY/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PERFILCHFEUGG3OAMC6W55P6DDIBZK4Q/
af854a3a-2127-422b-91ae-364da2661108https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.htmlMailing List
af854a3a-2127-422b-91ae-364da2661108https://seclists.org/oss-sec/2023/q4/37Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202311-14
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20231208-0002/
Impacted products
Vendor Product Version
gnu grub2 *
redhat enterprise_linux 8.0
redhat enterprise_linux 9.0
To clipboard 

{
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              "matchCriteriaId": "FF60F990-70DB-48EA-A956-1F6202F301EA",
              "versionEndExcluding": "2.12",
              "vulnerable": true
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An out-of-bounds write flaw was found in grub2\u0027s NTFS filesystem driver. This issue may allow an attacker to present a specially crafted NTFS filesystem image, leading to grub\u0027s 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."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 una falla de escritura fuera de los l\u00edmites 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 corrupci\u00f3n de los metadatos del mont\u00f3n de grub. En algunas circunstancias, el ataque tambi\u00e9n puede da\u00f1ar los metadatos del mont\u00f3n del firmware UEFI. Como resultado, se puede lograr la ejecuci\u00f3n de c\u00f3digo arbitrario y eludir la protecci\u00f3n de arranque seguro."
    }
  ],
  "id": "CVE-2023-4692",
  "lastModified": "2025-11-04T20:17:11.233",
  "metrics": {
    "cvssMetricV31": [
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          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
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          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
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          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H",
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  "published": "2023-10-25T18:17:41.743",
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  "vulnStatus": "Modified",
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}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.