Use After Free Affecting libxml2-python26 package, versions <0:2.9.1-6.6.42.amzn1


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.09% (39th percentile)

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  • Snyk IDSNYK-AMZN201803-LIBXML2PYTHON26-5496714
  • published4 May 2023
  • disclosed1 Jun 2021

Introduced: 1 Jun 2021

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

How to fix?

Upgrade Amazon-Linux:2018.03 libxml2-python26 to version 0:2.9.1-6.6.42.amzn1 or higher.
This issue was patched in ALAS-2023-1743.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libxml2-python26 package and not the libxml2-python26 package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 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