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.
総合評価: CVE-2023-4236 は中リスク（59.9/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 2.15%、80 パーセンタイル） 根拠: 直近 1 日で EPSS が +1.97% 上昇。悪用への関心が高まっている可能性があります。 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.18% | 2.15% | +1.97% |
| 2 | 2025-12-28 | 0.13% | 0.18% | +0.05% |
| 3 | 2025-12-27 | — | 0.13% | — |
EPSS の全履歴 （全 17 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2023-4236: 1 source package rows (bind); 36 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 7, open 29. | https://security.alpinelinux.org/vuln/CVE-2023-4236 |
debian
|
unimportant | CVE-2023-4236 unimportant priority: Debian including 1 source packages (bind9), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2023-4236 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2023-4236 |
suse
|
high | CVE-2023-4236 severity important: SUSE including 49 source package names (bind, bind-9.18.19-1.1, …), 386 product×package rows across 40 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 7.1, … (40 product lines)): Known Not Affected 369, Fixed 17. | https://www.suse.com/security/cve/CVE-2023-4236/ |
ubuntu
|
medium | CVE-2023-4236 medium priority: Ubuntu including 2 source packages (bind9, isc-dhcp), 22 status rows across 11 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, plucky, trusty, upstream, xenial): not-affected 14, released 7, needs-triage 1. | https://ubuntu.com/security/CVE-2023-4236 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| isc | bind | >= 9.18.0, < 9.18.18 | cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* |
| isc | bind | 9.18.11 | cpe:2.3:a:isc:bind:9.18.11:s1:*:*:supported_preview:*:*:* |
| isc | bind | 9.18.18 | cpe:2.3:a:isc:bind:9.18.18:s1:*:*:supported_preview:*:*:* |
| fedoraproject | fedora | 37 | cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* |
| fedoraproject | fedora | 38 | cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* |
| fedoraproject | fedora | 39 | cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* |
| debian | debian_linux | 10.0 | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
| debian | debian_linux | 11.0 | cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* |
| netapp | h300s_firmware | — | cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* |
| netapp | h500s_firmware | — | cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* |
| netapp | h700s_firmware | — | cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* |
| netapp | h410s_firmware | — | cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* |
| netapp | h410c_firmware | — | cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| http://www.openwall.com/lists/oss-security/2023/09/20/2 | Mailing List Third Party Advisory |
| https://kb.isc.org/docs/cve-2023-4236 | Vendor Advisory |
| https://lists.fedoraproject.org/archives/list/[email protected]/message/IPJLLTJCSDJJII7IIZPLTBQNWP7MZH7F/ | Mailing List |
| https://lists.fedoraproject.org/archives/list/[email protected]/message/U35OARLQCPMVCBBPHWBXY5M6XJLD2TZ5/ | Mailing List |
| https://lists.fedoraproject.org/archives/list/[email protected]/message/VSK5V4W4OHPM3JTJGWAQD6CZW7SFD75B/ | Mailing List Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20231013-0004/ | Third Party Advisory |
| https://www.debian.org/security/2023/dsa-5504 | Third Party Advisory |