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Critical USN-3235-1 3 CVEs

libxml2 vulnerabilities

Published Mar 16, 2017 · Updated Apr 22, 2026

Summary

It was discovered that libxml2 incorrectly handled format strings. If a
user or automated system were tricked into opening a specially crafted
document, an attacker could possibly cause libxml2 to crash, resulting in a
denial of service. This issue only affected Ubuntu 12.04 LTS, Ubuntu 14.04
LTS, and Ubuntu 16.04 LTS. (CVE-2016-4448)

It was discovered that libxml2 incorrectly handled certain malformed
documents. If a user or automated system were tricked into opening a
specially crafted document, an attacker could cause libxml2 to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2016-4658)

Nick Wellnhofer discovered that libxml2 incorrectly handled certain
malformed documents. If a user or automated system were tricked into
opening a specially crafted document, an attacker could cause libxml2 to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2016-5131)

Fixed packages 2

ReleasePackageFixed in
Ubuntu · 14.04 LTS 14.04:LTS libxml2 2.9.1+dfsg1-3ubuntu4.9
Ubuntu · 16.04 LTS 16.04:LTS libxml2 2.9.3+dfsg1-1ubuntu0.2

Vulnerabilities 3

  • Critical 9.8

    Nokogiri does not forbid namespace nodes in XPointer ranges

    xpointer.c in libxml2 before 2.9.5 (as used in Apple iOS before 10, OS X before 10.12, tvOS before 10, and watchOS before 3, and other products) does not forbid namespace nodes in XPointer ranges, which allows remote attackers to execute arbitrary code or cau…

  • High 8.8

    Use-after-free vulnerability in libxml2 through 2.9.4, as used in Google Chrome before 52.0.2743.82, allows remote atta…

  • Unscored —

    Format string vulnerability in libxml2 before 2.9.4 allows attackers to have unspecified impact via format string speci…

References

  • report
    https://ubuntu.com/security/CVE-2016-4448
  • report
    https://ubuntu.com/security/CVE-2016-4658
  • report
    https://ubuntu.com/security/CVE-2016-5131