h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. When an HTTP request using TLS/1.3 early data on top of TCP Fast Open or QUIC 0-RTT packets is received and the IP-address-based access control is used, the access control does not detect and prohibit HTTP requests conveyed by packets with a spoofed source address. This behavior allows attackers on the network to execute HTTP requests from addresses that are otherwise rejected by the address-based access control. The vulnerability has been addressed in commit 15ed15a. Users may disable the use of TCP FastOpen and QUIC to mitigate the issue.
総合評価: CVE-2024-45397 は低リスク(35.7/100)。CVSS 深刻度は中。悪用される可能性が高い(EPSS 0.44%、35 パーセンタイル) 推奨対応: 悪用情報と EPSS の推移を監視し、必要に応じて優先度を見直してください。
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 | 0.50% | 0.44% | -0.07% |
| 2 | 2026-05-07 | 0.66% | 0.50% | -0.15% |
| 3 | 2026-03-02 | — | 0.66% | — |
EPSS の全履歴 (全 9 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 |
|---|---|---|---|---|---|---|
| 5.9 | 3.1 | MEDIUM |
|
2.2 | 3.6 | [email protected] |
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
medium | CVE-2024-45397: 1 source package rows (h2o); 2 state rows across 1 repos (edge-community); fixed 0, open 2. | https://security.alpinelinux.org/vuln/CVE-2024-45397 |
debian
|
not yet assigned | CVE-2024-45397 not yet assigned priority: Debian including 1 source packages (h2o), 2 status rows across 2 suites (bookworm, bullseye): open 2. | https://security-tracker.debian.org/tracker/CVE-2024-45397 |
ubuntu
|
medium | CVE-2024-45397 medium priority: Ubuntu including 1 source packages (h2o), 8 status rows across 8 suites (bionic, focal, jammy, noble, oracular, plucky, questing, upstream): needs-triage 5, ignored 2, DNE 1. | https://ubuntu.com/security/CVE-2024-45397 |