CVE catalog
CVE-2023-4236
bind9: CVE-2023-4236
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 2.21% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | bind9 | sid | 1:9.20.30-1 | fixed |
| Debian | bind9 | forky | 1:9.20.30-1 | fixed |
| Debian | bind9 | trixie | 1:9.20.26-1~deb13u1 | fixed |
| Debian | bind9 | trixie-security | 1:9.20.30-1~deb13u1 | fixed |
| Debian | bind9 | bookworm | 1:9.18.49-1~deb12u1 | fixed |
| Debian | bind9 | bookworm-security | 1:9.18.49-1~deb12u3 | fixed |
| Alpine | bind | 3.17 | 9.18.19-r0 | fixed |
| Alpine | bind | 3.18 | 9.18.19-r0 | fixed |
| Alpine | bind | 3.19 | 9.18.19-r0 | fixed |
| Alpine | bind | 3.20 | 9.18.19-r0 | fixed |
| Alpine | bind | 3.21 | 9.18.19-r0 | fixed |
| Alpine | bind | 3.22 | 9.18.19-r0 | fixed |
| Alpine | bind | 3.23 | 9.18.19-r0 | fixed |
| Alpine | bind | 3.24 | 9.18.19-r0 | fixed |
| Ubuntu | bind9 | 22.04 | 1:9.16.15-1ubuntu1 | vulnerable |
| Ubuntu | bind9 | 22.04 | 1:9.16.15-1ubuntu2 | vulnerable |
| Ubuntu | bind9 | 22.04 | 1:9.16.15-1ubuntu3 | vulnerable |
| Ubuntu | bind9 | 22.04 | 1:9.18.0-2ubuntu1 | vulnerable |
| Ubuntu | bind9 | 22.04 | 1:9.18.0-2ubuntu2 | vulnerable |
| Ubuntu | bind9 | 22.04 | 1:9.18.0-2ubuntu3 | vulnerable |
| Ubuntu | bind9 | 22.04 | 1:9.18.1-1ubuntu1 | vulnerable |
| Ubuntu | bind9 | 22.04 | 1:9.18.1-1ubuntu1.1 | vulnerable |
| Ubuntu | bind9 | 22.04 | 1:9.18.1-1ubuntu1.2 | vulnerable |
| Ubuntu | bind9 | 22.04 | 1:9.18.1-1ubuntu1.3 | vulnerable |
| Ubuntu | bind9 | 22.04 | 1:9.18.12-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | bind9 | 22.04 | 1:9.18.12-0ubuntu0.22.04.2 | vulnerable |
| Ubuntu | bind9 | 22.04 | 1:9.18.12-0ubuntu0.22.04.3 | fixed |
| Ubuntu | bind9 | 24.04 | 1:9.18.18-0ubuntu2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | bind9 | source | sid | 1:9.19.17-1 | not yet assigned | Not reported | [1052417] |
| Debian | bind9 | source | forky | 1:9.19.17-1 | not yet assigned | Not reported | [1052417] |
| Debian | bind9 | source | trixie | 1:9.19.17-1 | not yet assigned | Not reported | [1052417] |
| Debian | bind9 | source | bookworm | 1:9.18.19-1~deb12u1 | not yet assigned | Not reported | [1052417] |
| Alpine | bind | apk | 3.17 | 9.18.19-r0 | Not reported | ALPINE-CVE-2023-4236 | Not reported |
| Alpine | bind | apk | 3.18 | 9.18.19-r0 | Not reported | ALPINE-CVE-2023-4236 | Not reported |
| Alpine | bind | apk | 3.19 | 9.18.19-r0 | Not reported | ALPINE-CVE-2023-4236 | Not reported |
| Alpine | bind | apk | 3.20 | 9.18.19-r0 | Not reported | ALPINE-CVE-2023-4236 | Not reported |
| Alpine | bind | apk | 3.21 | 9.18.19-r0 | Not reported | ALPINE-CVE-2023-4236 | Not reported |
| Alpine | bind | apk | 3.22 | 9.18.19-r0 | Not reported | ALPINE-CVE-2023-4236 | Not reported |
| Alpine | bind | apk | 3.23 | 9.18.19-r0 | Not reported | ALPINE-CVE-2023-4236 | Not reported |
| Alpine | bind | apk | 3.24 | 9.18.19-r0 | Not reported | ALPINE-CVE-2023-4236 | Not reported |
| Ubuntu | bind9 | deb | 22.04 | 1:9.18.12-0ubuntu0.22.04.3 | Not reported | UBUNTU-CVE-2023-4236 | Not reported |
| Ubuntu | bind9 | deb | 24.04 | 1:9.18.18-0ubuntu2 | Not reported | UBUNTU-CVE-2023-4236 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
References
- [https://cert-portal.siemens.com/productcert/csaf/ssa-915275.json]
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2024_13249-1.json]
- [https://osv.dev/vulnerability/ALPINE-CVE-2023-4236]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2023-4236]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2023-4236]
- [https://security-tracker.debian.org/tracker/CVE-2023-4236]
- [https://wid.cert-bund.de/.well-known/csaf/white/2023/wid-sec-w-2023-2412.json]
[CERT-Bund public advisories] · [CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]