Uncontrolled Recursion Affecting libxml2-python package, versions <0:2.9.1-6.el7_2.3


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
1.09% (85th percentile)

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  • Snyk IDSNYK-RHEL7-LIBXML2PYTHON-5066672
  • published26 Jul 2021
  • disclosed3 May 2016

Introduced: 3 May 2016

CVE-2016-3705  (opens in a new tab)
CWE-674  (opens in a new tab)

How to fix?

Upgrade RHEL:7 libxml2-python to version 0:2.9.1-6.el7_2.3 or higher.
This issue was patched in RHSA-2016:1292.

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 RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

The (1) xmlParserEntityCheck and (2) xmlParseAttValueComplex functions in parser.c in libxml2 2.9.3 do not properly keep track of the recursion depth, which allows context-dependent attackers to cause a denial of service (stack consumption and application crash) via a crafted XML document containing a large number of nested entity references.

CVSS Scores

version 3.1