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Use After Free Affecting libxml2 package, versions <0:2.9.1-6.amzn2.5.4

medium

Snyk CVSS

    Attack Complexity Low
    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-AMZN2-LIBXML2-1701443
  • published 27 Sep 2021
  • disclosed 18 May 2021
Report a new vulnerability Found a mistake?

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 Amazon-Linux:2 libxml2 to version 0:2.9.1-6.amzn2.5.4 or higher.
This issue was patched in ALAS2-2021-1677.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libxml2 package and not the libxml2 package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 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