---
cve: "CVE-2024-45397"
severity: "HIGH"
cvss: 7.5
epss: "32%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2024-10-11 15:15:04"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-04T03:05:23+02:00"
---

# CVE-2024-45397

> 7.5 HIGH

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Keine | good |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 15ed15a2efb83a77bb4baaa5a119e639c2f6898a (Commit)

## Referenzen

- <https://github.com/h2o/h2o/commit/15ed15a2efb83a77bb4baaa5a119e639c2f6898a>
- <https://github.com/h2o/h2o/security/advisories/GHSA-jf2c-xjcp-wg4c>
- <https://h2o.examp1e.net/configure/http3_directives.html>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2024-45397) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_