A flaw was found in Undertow. When an AJP request is sent that exceeds the max-header-size attribute in ajp-listener, JBoss EAP is marked in an error state by mod_cluster in httpd, causing JBoss EAP to close the TCP connection without returning an AJP response. This happens because mod_proxy_cluster marks the JBoss EAP instance as an error worker when the TCP connection is closed from the backend after sending the AJP request without receiving an AJP response, and stops forwarding. This issue could allow a malicious user could to repeatedly send requests that exceed the max-header-size, causing a Denial of Service (DoS).
総合評価: CVE-2023-5379 は中リスク(51.4/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 1.02%、59 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 | 0.16% | 1.02% | +0.85% |
| 2 | 2026-04-25 | 0.14% | 0.16% | +0.02% |
| 3 | 2025-11-21 | — | 0.14% | — |
EPSS の全履歴 (全 11 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 |
|---|---|---|---|
debian
|
not yet assigned | CVE-2023-5379 not yet assigned priority: Debian including 1 source packages (undertow), 2 status rows across 2 suites (forky, sid): resolved 2. | https://security-tracker.debian.org/tracker/CVE-2023-5379 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2023-5379 |
ubuntu
|
medium | CVE-2023-5379 medium priority: Ubuntu including 1 source packages (undertow), 12 status rows across 12 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): needs-triage 7, ignored 3, DNE 2. | https://ubuntu.com/security/CVE-2023-5379 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| redhat | jboss_enterprise_application_platform | — | cpe:2.3:a:redhat:jboss_enterprise_application_platform:-:*:*:*:text-only:*:*:* |
| redhat | jboss_enterprise_application_platform | 7.0.0 | cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.0.0:*:*:*:*:*:*:* |
| redhat | single_sign-on | 7.0 | cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:* |
| redhat | undertow | — | cpe:2.3:a:redhat:undertow:-:*:*:*:*:*:*:* |