🛡️ CVE-2024-45403
🟢 CVSS 3.7 — Low ✅ No Known Exploit CWE-617 NVD
3.7
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. When h2o is configured as a reverse proxy and HTTP/3 requests are cancelled by the client, h2o might crash due to an assertion failure. The crash can be exploited by an attacker to mount a Denial-of-Service attack. By default, the h2o standalone server automatically restarts, minimizing the impact. However, HTTP requests that were served concurrently will still be disrupted. The vulnerability has been addressed in commit 1ed32b2. Users may disable the use of HTTP/3 to mitigate the issue.

Details

Severity LOW
CVSS Score 3.7
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE CWE-617
Public Exploit ✅ No
Source NVD
Published 2024-10-11
Updated 2026-06-02
Modified 2024-11-12

Affected Packages

Software From version Fixed in
h2o 2024-06-18 2024-09-04

Similar Threats

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