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Loop with Unreachable Exit Condition ('Infinite Loop') Affecting libxml2-python27 package, versions <0:2.9.1-6.4.41.amzn1

medium

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.6% (79th percentile)
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NVD
7.5 high
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SUSE
4.3 medium
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Red Hat
7.5 high

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  • Snyk ID SNYK-AMZN201803-LIBXML2PYTHON27-1724552
  • published 27 Sep 2021
  • disclosed 21 Jan 2020
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Introduced: 21 Jan 2020

CVE-2020-7595 Open this link in a new tab
CWE-835 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2018.03 libxml2-python27 to version 0:2.9.1-6.4.41.amzn1 or higher.
This issue was patched in ALAS-2020-1438.

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.

xmlStringLenDecodeEntities in parser.c in libxml2 2.9.10 has an infinite loop in a certain end-of-file situation.

References