CVE-2023-4692 Grub2: out-of-bounds write at fs/ntfs.c may lead to unsigned code execution

2023-10-2510:27:29

CWE-122

redhat

www.cve.org

grub2

ntfs filesystem

out-of-bounds write

code execution

secure boot protection

7.5 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

8.3 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

JSON

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.

CNA Affected

[
  {
    "versions": [
      {
        "status": "unaffected",
        "version": "2.12",
        "lessThan": "*",
        "versionType": "custom"
      }
    ],
    "packageName": "grub",
    "collectionURL": "https://git.savannah.gnu.org/git/grub.git/"
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "grub2",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "1:2.02-156.el8",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:8::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "grub2",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "1:2.06-77.el9",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:9::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 7",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "grub2",
    "defaultStatus": "unknown",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:7"
    ]
  }
]