high
7.8
CWE
119 787
Advisory Published
CVE Published
CVE Published
Updated

CVE-2021-33285: Buffer Overflow

First published: Tue May 11 2021(Updated: )

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.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/ntfs3g<2021.8.22
2021.8.22
debian/ntfs-3g<=1:2017.3.23AR.3-4
1:2021.8.22-1
1:2017.3.23AR.3-4+deb11u1
1:2017.3.23AR.3-3+deb10u1
debian/2017.3.23AR.3<=undefined
debian/ntfs-3g
1:2017.3.23AR.3-4+deb11u3
1:2022.10.3-1
1:2022.10.3-3
ntfs-3g<2021.8.22
Red Hat Enterprise Linux=7.0
Red Hat Enterprise Linux=8.0
Red Hat Enterprise Linux=8.0
Fedora=33
Fedora=34
Fedora=35
Debian=9.0
Debian=10.0
Debian=11.0

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2021-33285?

    CVE-2021-33285 has been classified as a high severity vulnerability due to its ability to cause memory disclosure or denial of service.

  • How do I fix CVE-2021-33285?

    To fix CVE-2021-33285, update to NTFS-3G version 2021.8.22 or later.

  • What types of systems are affected by CVE-2021-33285?

    CVE-2021-33285 affects systems using NTFS-3G versions prior to 2021.8.22 on Red Hat and Debian distributions.

  • What are the potential consequences of exploiting CVE-2021-33285?

    Exploiting CVE-2021-33285 can lead to memory disclosure or denial of service for the affected systems.

  • Is there a workaround for CVE-2021-33285 until I can apply a patch?

    Disabling the use of NTFS-3G or avoiding the handling of specially crafted NTFS attributes can serve as a temporary workaround for CVE-2021-33285.

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