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Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion') Affecting libxml2-python package, versions *

medium

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.6% (79th percentile)
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NVD
9.8 critical
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Red Hat
7.5 high

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  • Snyk ID SNYK-CENTOS7-LIBXML2PYTHON-1981170
  • published 26 Jul 2021
  • disclosed 5 Jun 2017
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Introduced: 5 Jun 2017

CVE-2017-16931 Open this link in a new tab
CWE-776 Open this link in a new tab

How to fix?

There is no fixed version for Centos:7 libxml2-python.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libxml2-python package and not the libxml2-python package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a '%' character in a DTD name.