### [CVE-2024-45397](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-45397)
![](https://img.shields.io/static/v1?label=Product&message=h2o&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2015ed15a2efb83a77bb4baaa5a119e639c2f6898a%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-284%3A%20Improper%20Access%20Control&color=brightgreen)

### Description

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.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/MWedl/http3-ip-spoofing
- https://github.com/fkie-cad/nvd-json-data-feeds