Vulnerability Details : CVE-2021-33285
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.
Vulnerability category: OverflowMemory CorruptionDenial of service
Exploit prediction scoring system (EPSS) score for CVE-2021-33285
Probability of exploitation activity in the next 30 days: 0.05%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 19 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-33285
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
6.9
|
MEDIUM | AV:L/AC:M/Au:N/C:C/I:C/A:C |
3.4
|
10.0
|
NIST |
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2021-33285
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The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-33285
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https://www.openwall.com/lists/oss-security/2021/08/30/1
oss-security - NTFS3G-SA-2021-0001: Multiple buffer overflows in all versions of NTFS-3GMailing List;Third Party Advisory
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https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HSEKTKHO5HFZHWZNJNBJZA56472KRUZI/
[SECURITY] Fedora 35 Update: ntfs-3g-2021.8.22-2.fc35 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-q759-8j5v-q5jp
OPEN SOURCE NTFS-3G SECURITY ADVISORY NTFS3G-SA-2021-0001 · Advisory · tuxera/ntfs-3g · GitHubThird Party Advisory
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https://security.gentoo.org/glsa/202301-01
NTFS-3G: Multiple Vulnerabilities (GLSA 202301-01) — Gentoo securityThird Party Advisory
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https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=988386
#988386 - ntfs-3g: CVE-2021-33285 CVE-2021-35269 CVE-2021-35268 CVE-2021-33289 CVE-2021-33286 CVE-2021-35266 CVE-2021-33287 CVE-2021-35267 CVE-2021-39251 CVE-2021-39252 CVE-2021-39253 CVE-2021-39254 CIssue Tracking;Mailing List;Third Party Advisory
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https://bugzilla.redhat.com/show_bug.cgi?id=2001608
2001608 – (CVE-2021-33285) CVE-2021-33285 ntfs3g: Unknown local vulnerabilityIssue Tracking;Third Party Advisory
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https://www.debian.org/security/2021/dsa-4971
Debian -- Security Information -- DSA-4971-1 ntfs-3gThird Party Advisory
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https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/766ISTT3KCARKFUIQT7N6WV6T63XOKG3/
[SECURITY] Fedora 33 Update: ntfs-3g-2021.8.22-2.fc33 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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https://lists.debian.org/debian-lts-announce/2021/11/msg00013.html
[SECURITY] [DLA 2819-1] ntfs-3g security updateMailing List;Third Party Advisory
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http://www.openwall.com/lists/oss-security/2021/08/30/1
oss-security - NTFS3G-SA-2021-0001: Multiple buffer overflows in all versions of NTFS-3GMailing List;Third Party Advisory
Products affected by CVE-2021-33285
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
- cpe:2.3:a:tuxera:ntfs-3g:*:*:*:*:*:*:*:*