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Use After Free Affecting expat package, versions <0:2.1.0-15.33.amzn1

0.0
high

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.52% (77th percentile)
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NVD
7.5 high
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SUSE
8.1 high
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Red Hat
7.5 high

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  • Snyk ID SNYK-AMZN201803-EXPAT-3157869
  • published 6 Dec 2022
  • disclosed 24 Oct 2022
Report a new vulnerability Found a mistake?

Introduced: 24 Oct 2022

CVE-2022-43680 Open this link in a new tab
CWE-416 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2018.03 expat to version 0:2.1.0-15.33.amzn1 or higher.
This issue was patched in ALAS-2022-1655.

NVD Description

Note: Versions mentioned in the description apply only to the upstream expat package and not the expat package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

In libexpat through 2.4.9, there is a use-after free caused by overeager destruction of a shared DTD in XML_ExternalEntityParserCreate in out-of-memory situations.

References