CVE-2023-4692 (GCVE-0-2023-4692)

Vulnerability from cvelistv5 – Published: 2023-10-25 10:27 – Updated: 2025-11-07 00:30
VLAI
Title
Grub2: out-of-bounds write at fs/ntfs.c may lead to unsigned code execution
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.
Severity
7.5 (High)
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
References
Impacted products
Vendor Product Version
Unaffected: 2.12 , < * (custom)
Red Hat Red Hat Enterprise Linux 8 Unaffected: 1:2.02-156.el8 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:8::baseos
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Red Hat Red Hat Enterprise Linux 9 Unaffected: 1:2.06-77.el9 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:9::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
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Date Public
2023-10-03 00:00
Show details on NVD website
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\"name\": \"RHSA-2024:2456\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:3184\", \"name\": \"RHSA-2024:3184\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/security/cve/CVE-2023-4692\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2236613\", \"name\": \"RHBZ#2236613\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager/\"}, {\"url\": \"https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.html\"}, {\"url\": \"https://seclists.org/oss-sec/2023/q4/37\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"An out-of-bounds write flaw was found in grub2\u0027s NTFS filesystem driver. 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      "cveMetadata": "{\"cveId\": \"CVE-2023-4692\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-07T00:30:50.177Z\", \"dateReserved\": \"2023-08-31T21:53:09.692Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2023-10-25T10:27:29.173Z\", \"assignerShortName\": \"redhat\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.