CVE-2021-33285
- State
- Published
- Severity
- 6.7 Medium
- Published
- Sep 7, 2021
- Updated
- Dec 3, 2025
- Reserved
- May 20, 2021
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.7 Medium | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
- CWE-20 Improper Input Validation
Affected Products
| Product | Versions |
|---|---|
n/an/a |
|
References
- [oss-security] 20210830 NTFS3G-SA-2021-0001: Multiple buffer overflows in all versions of NTFS-3Gmailing-list
- https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-q759-8j5v-q5jp
- https://www.openwall.com/lists/oss-security/2021/08/30/1
- https://bugzilla.redhat.com/show_bug.cgi?id=2001608
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=988386
- DSA-4971vendor-advisory
- FEDORA-2021-e7c8ba6301vendor-advisory
- FEDORA-2021-5b1dac797bvendor-advisory
- [debian-lts-announce] 20211116 [SECURITY] [DLA 2819-1] ntfs-3g security updatemailing-list
- GLSA-202301-01vendor-advisory
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