UpHeron
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Servers and applications

CVE-2023-4236

A flaw in the networking code handling DNS-over-TLS queries may cause `named` to terminate unexpectedly due to an assertion failure. This happens when internal data structures are incorrectly reused under significant DNS-over-TLS query load. This issue affects BIND 9 versions 9.18.0 through 9.18.18 and 9.18.11-S1 through 9.18.18-S1.

Severity
High 7.5
Published
20 Sept 2023
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
9.18.18
Sources
NVD

Affected software

SoftwareAffected versions
BIND 9Servers and applications · cpe:a:isc:bind
  • From 9.18.0 before 9.18.18
  • Version 9.18.11-s1
  • Version 9.18.18-s1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-4236
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-4236