Home/CVE/A flaw in the networking code handling DNS-over-TLS queries may cause `named` to terminate unexpectedly due to an assert
CVE

CVE-2023-4236

A flaw in the networking code handling DNS-over-TLS queries may cause `named` to terminate unexpectedly due to an assert

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.

HIGH · CVSS 7.5 EPSS 0.00177
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-617Reachable Assertion
▤

Affected Products & Versions

9
isc bind>= 9.18.0 and < 9.18.18
isc bindall versions
fedoraproject fedoraall versions
debian linuxall versions
netapp h300s firmwareall versions
netapp h500s firmwareall versions
netapp h700s firmwareall versions
netapp h410s firmwareall versions
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security-officer@isc.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD20 Sep 2023 · 01:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

4
siemens-csafSSA-915275
suse-csafopenSUSE-SU-2024:13249-1
usnUSN-6390-1
cisa-csafcisa-csaf-csaf_files-OT-white-2024-icsa-24-319-08
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.openwall.com/lists/oss-security/2023/09/20/2Mailing ListThird Party Advisory
https://kb.isc.org/docs/cve-2023-4236Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IPJLLTJCSDJJII7IIZPLTBQNWP7MZH7F/Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U35OARLQCPMVCBBPHWBXY5M6XJLD2TZ5/Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VSK5V4W4OHPM3JTJGWAQD6CZW7SFD75B/Mailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20231013-0004/Third Party Advisory
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