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Use After Free Affecting libxml2 package, versions <2.9.1+dfsg1-3ubuntu4.13+esm2

medium

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.15% (51st percentile)
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NVD
7.8 high
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SUSE
5.9 medium
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Red Hat
7.8 high

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  • Snyk ID SNYK-UBUNTU1404-LIBXML2-1299936
  • published 4 Jun 2021
  • disclosed 1 Jun 2021
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Introduced: 1 Jun 2021

CVE-2021-3516 Open this link in a new tab
CWE-416 Open this link in a new tab

How to fix?

Upgrade Ubuntu:14.04 libxml2 to version 2.9.1+dfsg1-3ubuntu4.13+esm2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libxml2 package and not the libxml2 package as distributed by Ubuntu. See How to fix? for Ubuntu:14.04 relevant fixed versions and status.

There's a flaw in libxml2's xmllint in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by xmllint could trigger a use-after-free. The greatest impact of this flaw is to confidentiality, integrity, and availability.

References