"deny-answer-aliases" is a little-used feature intended to help recursive server operators protect end users against DNS rebinding attacks, a potential method of circumventing the security model used by client browsers. However, a defect in this feature makes it easy, when the feature is in use, to experience an assertion failure in name.c. Affects BIND 9.7.0->9.8.8, 9.9.0->9.9.13, 9.10.0->9.10.8, 9.11.0->9.11.4, 9.12.0->9.12.2, 9.13.0->9.13.2.
総合評価: CVE-2018-5740 は中リスク（59.5/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 64.53%、98 パーセンタイル） 根拠: EPSS 上、短期間での悪用可能性は高い水準です。 推奨対応: 悪用可能性が高いため、影響範囲の確認と修補の優先付けを推奨します。
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 | 2026-04-13 | 75.02% | 64.53% | -10.49% |
| 2 | 2026-03-03 | 69.02% | 75.02% | +6.00% |
| 3 | 2025-11-30 | — | 69.02% | — |
EPSS の全履歴 （全 34 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] |
| 7.5 | 3.0 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
high | CVE-2018-5740: 1 source package rows (bind); 30 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 20. | https://security.alpinelinux.org/vuln/CVE-2018-5740 |
debian
|
not yet assigned | CVE-2018-5740 not yet assigned 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-2018-5740 |
gentoo
|
normal | CVE-2018-5740: 1 GLSA(s) (201903-13), 1 atom(s) (net-dns/bind); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2018-5740 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2018-5740 |
suse
|
high | CVE-2018-5740 severity important: SUSE including 182 source package names (bind, bind-9.11.2-12.11.2, …), 480 product×package rows across 75 product lines (Image SLES12-SP5-Azure-BYOS, Image SLES12-SP5-Azure-Basic-On-Demand, … (75 product lines)): Fixed 476, Known Not Affected 4. | https://www.suse.com/security/cve/CVE-2018-5740/ |
ubuntu
|
medium | CVE-2018-5740 medium priority: Ubuntu including 1 source packages (bind9), 4 status rows across 4 suites (bionic, trusty, upstream, xenial): released 3, needs-triage 1. | https://ubuntu.com/security/CVE-2018-5740 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| isc | bind | >= 9.7.0, < 9.8.8 | cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* |
| isc | bind | >= 9.9.0, < 9.9.13 | cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* |
| isc | bind | >= 9.10.0, < 9.10.8 | cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* |
| isc | bind | >= 9.11.0, < 9.11.4 | cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* |
| isc | bind | >= 9.12.0, < 9.12.2 | cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* |
| isc | bind | >= 9.13.0, < 9.13.2 | cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* |
| redhat | enterprise_linux_desktop | 6.0 | cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_desktop | 7.0 | cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server | 6.0 | cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server | 7.0 | cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 7.6 | cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_eus | 7.5 | cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_eus | 7.6 | cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_workstation | 6.0 | cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_workstation | 7.0 | cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* |
| debian | debian_linux | 8.0 | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* |
| debian | debian_linux | 9.0 | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
| netapp | data_ontap_edge | — | cpe:2.3:a:netapp:data_ontap_edge:-:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 12.04 | cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* |
| canonical | ubuntu_linux | 14.04 | cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 16.04 | cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 18.04 | cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* |
| hp | hp-ux | — | cpe:2.3:o:hp:hp-ux:-:*:*:*:*:*:*:* |
| opensuse | leap | 15.0 | cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* |
| opensuse | leap | 15.1 | cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* |
| opensuse | leap | 42.3 | cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:* |