CVE-2021-33285 (GCVE-0-2021-33285)

Vulnerability from cvelistv5 – Published: 2021-09-07 00:00 – Updated: 2025-12-03 14:52
VLAI
Summary
In NTFS-3G versions < 2021.8.22, when a specially crafted NTFS attribute is supplied to the function ntfs_get_attribute_value, a heap buffer overflow can occur allowing for memory disclosure or denial of service. The vulnerability is caused by an out-of-bound buffer access which can be triggered by mounting a crafted ntfs partition. The root cause is a missing consistency check after reading an MFT record : the "bytes_in_use" field should be less than the "bytes_allocated" field. When it is not, the parsing of the records proceeds into the wild.
Severity
6.7 (Medium)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • n/a
  • CWE-20 - Improper Input Validation
Assigner
References
Show details on NVD website
To clipboard 

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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T06:25:17+00:00",
      "cve": "CVE-2021-33285",
      "id": "CVE-2021-33285",
      "initial_release_date": "2021-08-30T00:00:00+00:00",
      "product_status:fixed": "2813",
      "product_status:known_affected": "8",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "ntfs-3g: Out-of-bounds heap buffer access in ntfs_get_attribute_value() due to incorrect check of bytes_in_use value in MFT records",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-33285.json",
      "version": "3"
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