Use After Free Affecting python3-libxml2 package, versions <0:2.9.7-9.el8_4.2


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.09% (39th percentile)

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  • Snyk IDSNYK-RHEL8-PYTHON3LIBXML2-4063108
  • published26 Jul 2021
  • disclosed21 Apr 2021

Introduced: 21 Apr 2021

CVE-2021-3516  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:8 python3-libxml2 to version 0:2.9.7-9.el8_4.2 or higher.
This issue was patched in RHSA-2021:2569.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-libxml2 package and not the python3-libxml2 package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

There's a flaw in libxml2's xmllint in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by xmllint could trigger a use-after-free. The greatest impact of this flaw is to confidentiality, integrity, and availability.

CVSS Scores

version 3.1