UpHeron
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Servers and applications

CVE-2021-3672

A flaw was found in c-ares library, where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability.

Severity
Medium 5.6
Published
23 Nov 2021
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
1.17.2, 12.22.5, 14.17.5, 16.6.2
Sources
NVD

Affected software

SoftwareAffected versions
c-aresServers and applications · cpe:a:c-ares_project:c-ares
  • From 1.0.0 before 1.17.2
Node.jsServers and applications · cpe:a:nodejs:node.js
  • From 12.0.0 up to 12.12.0
  • From 12.13.0 before 12.22.5
  • From 14.0.0 up to 14.14.0
  • From 14.15.0 before 14.17.5
  • From 16.0.0 before 16.6.2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-3672
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-3672