High severity7.5NVD Advisory· Published Sep 20, 2023· Updated Jun 17, 2026
CVE-2023-4236
CVE-2023-4236
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
16cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*+ 4 more
- cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*range: >=9.18.0,<9.18.18
- cpe:2.3:a:isc:bind:9.18.11:s1:*:*:supported_preview:*:*:*
- cpe:2.3:a:isc:bind:9.18.18:s1:*:*:supported_preview:*:*:*
- (no CPE)range: 9.18.0 - 9.18.18, 9.18.11-S1 - 9.18.18-S1
- (no CPE)range: 9.18.0
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
7- www.openwall.com/lists/oss-security/2023/09/20/2nvdMailing ListThird Party Advisory
- kb.isc.org/docs/cve-2023-4236nvdVendor Advisory
- lists.fedoraproject.org/archives/list/[email protected]/message/VSK5V4W4OHPM3JTJGWAQD6CZW7SFD75B/nvdMailing ListThird Party Advisory
- security.netapp.com/advisory/ntap-20231013-0004/nvdThird Party Advisory
- www.debian.org/security/2023/dsa-5504nvdThird Party Advisory
- lists.fedoraproject.org/archives/list/[email protected]/message/IPJLLTJCSDJJII7IIZPLTBQNWP7MZH7F/nvdMailing List
- lists.fedoraproject.org/archives/list/[email protected]/message/U35OARLQCPMVCBBPHWBXY5M6XJLD2TZ5/nvdMailing List
News mentions
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