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NULL Pointer Dereference Affecting libxml2-python27 package, versions <0:2.9.1-6.6.42.amzn1

medium

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 1.02% (84th percentile)
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NVD
5.9 medium
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SUSE
7.5 high
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Red Hat
7.5 high

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  • Snyk ID SNYK-AMZN201803-LIBXML2PYTHON27-5496946
  • published 4 May 2023
  • disclosed 14 May 2021
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Introduced: 14 May 2021

CVE-2021-3537 Open this link in a new tab
CWE-476 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2018.03 libxml2-python27 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-python27 package and not the libxml2-python27 package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability.

References