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CVE-2021-42521

Good to know:

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Date: August 24, 2022

There is a NULL pointer dereference vulnerability in VTK before 9.2.5, and it lies in IO/Infovis/vtkXMLTreeReader.cxx. The vendor didn't check the return value of libxml2 API 'xmlDocGetRootElement', and try to dereference it. It is unsafe as the return value can be NULL and that NULL pointer dereference may crash the application.

Language: Python

Severity Score

Related Resources (9)

https://discourse.vtk.org/t/vtk-9-2-5-is-out/10549
https://github.com/pypa/advisory-database/tree/main/vulns/vtk/PYSEC-2022-255.yaml
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PCTMSAAVP4BW2HTZLDWMGKZ2WEC5OFLK/
https://nvd.nist.gov/vuln/detail/CVE-2021-42521
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PCTMSAAVP4BW2HTZLDWMGKZ2WEC5OFLK
https://gitlab.kitware.com/vtk/vtk
https://gitlab.kitware.com/vtk/vtk/issues/17818
https://github.com/advisories/GHSA-xfhg-9pjg-xg7g
https://www.mend.io/vulnerability-database/CVE-2021-42521

Severity Score

Weakness Type (CWE)

NULL Pointer Dereference

CWE-476

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Top Fix

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Upgrade to version vtk - 9.0.1

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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