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


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.41% (75th percentile)

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  • Snyk IDSNYK-AMZN2-LIBXML2-1701443
  • published27 Sept 2021
  • disclosed18 May 2021

Introduced: 18 May 2021

CVE-2021-3518  (opens in a new tab)
CWE-416  (opens 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

CVSS Scores

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