Bug 2189653 (CVE-2021-42521)

Summary:	CVE-2021-42521 vtk: NULL pointer dereference vulnerability
Product:	[Other] Security Response	Reporter:	Chess Hazlett <chazlett>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	Keywords:	Security
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2023-04-26 01:10:20 UTC	Type:	---
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Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2189654, 2189655
Bug Blocks:

Description Chess Hazlett 2023-04-25 20:14:14 UTC

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.

https://gitlab.kitware.com/vtk/vtk/-/issues/17818

For further information see: https://security-tracker.debian.org/tracker/CVE-2021-42521 
    https://www.cve.org/CVERecord?id=CVE-2021-42521

Comment 1 Chess Hazlett 2023-04-25 20:14:29 UTC

Created vtk tracking bugs for this issue:

Affects: epel-all [bug 2189655]
Affects: fedora-all [bug 2189654]

Comment 2 Product Security DevOps Team 2023-04-26 01:10:19 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.