NLnet Labs Unbound version 1.18.0 up to and including version 1.19.1 contain a vulnerability that can cause denial of service by a certain code path that can lead to an infinite loop. Unbound 1.18.0 introduced a feature that removes EDE records from responses with size higher than the client's advertised buffer size. Before removing all the EDE records however, it would try to see if trimming the extra text fields on those records would result in an acceptable size while still retaining the EDE codes. Due to an unchecked condition, the code that trims the text of the EDE records could loop indefinitely. This happens when Unbound would reply with attached EDE information on a positive reply and the client's buffer size is smaller than the needed space to include EDE records. The vulnerability can only be triggered when the 'ede: yes' option is used; non default configuration. From version 1.19.2 on, the code is fixed to avoid looping indefinitely.
総合評価: CVE-2024-1931 は中リスク（54.7/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 2.52%、83 パーセンタイル） 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 | 6.75% | 2.52% | -4.24% |
| 2 | 2025-11-21 | 24.65% | 6.75% | -17.90% |
| 3 | 2025-11-18 | — | 24.65% | — |
EPSS の全履歴 （全 19 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 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2024-1931: 1 source package rows (unbound); 12 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 5. | https://security.alpinelinux.org/vuln/CVE-2024-1931 |
debian
|
unimportant | CVE-2024-1931 unimportant priority: Debian including 1 source packages (unbound), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2024-1931 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2024-1931 |
suse
|
medium | CVE-2024-1931 severity moderate: SUSE including 25 source package names (latest:libopenssl3-3.1.4-slfo.1.1_4.1, latest:openssl-3-3.1.4-slfo.1.1_4.1, …), 154 product×package rows across 50 product lines (Container suse/sl-micro/6.0/baremetal-os-container, Container suse/sl-micro/6.0/base-os-container, … (50 product lines)): Known Not Affected 89, Fixed 65. | https://www.suse.com/security/cve/CVE-2024-1931/ |
ubuntu
|
medium | CVE-2024-1931 medium priority: Ubuntu including 1 source packages (unbound), 8 status rows across 8 suites (bionic, focal, jammy, mantic, noble, trusty, upstream, xenial): not-affected 6, released 2. | https://ubuntu.com/security/CVE-2024-1931 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| nlnetlabs | unbound | >= 1.18.0, < 1.19.2 | cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:* |
| fedoraproject | fedora | 38 | cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* |
| fedoraproject | fedora | 39 | cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* |
| fedoraproject | fedora | 40 | cpe:2.3:o:fedoraproject:fedora:40:*:*:*:*:*:*:* |