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Use After Free Affecting libxml2 package, versions <2.9.3+dfsg1-1ubuntu0.7+esm1

medium

Snyk CVSS

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

    Threat Intelligence

    EPSS 0.41% (74th percentile)
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NVD
8.8 high
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SUSE
5.9 medium
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Red Hat
8.6 high

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  • Snyk ID SNYK-UBUNTU1604-LIBXML2-1299935
  • published 4 Jun 2021
  • disclosed 18 May 2021
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Introduced: 18 May 2021

CVE-2021-3518 Open this link in a new tab
CWE-416 Open this link in a new tab

How to fix?

Upgrade Ubuntu:16.04 libxml2 to version 2.9.3+dfsg1-1ubuntu0.7+esm1 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:16.04 relevant fixed versions and status.

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

References