Bug 2189653 (CVE-2021-42521) - CVE-2021-42521 vtk: NULL pointer dereference vulnerability
Summary: CVE-2021-42521 vtk: NULL pointer dereference vulnerability
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2021-42521
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2189654 2189655
Blocks:
TreeView+ depends on / blocked
 
Reported: 2023-04-25 20:14 UTC by Chess Hazlett
Modified: 2023-04-26 01:10 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2023-04-26 01:10:20 UTC
Embargoed:

Attachments (Terms of Use)

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.
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