cve/2024/CVE-2024-39321.md

### [CVE-2024-39321](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-39321)
![](https://img.shields.io/static/v1?label=Product&message=traefik&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20%3C%202.11.6%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-639%3A%20Authorization%20Bypass%20Through%20User-Controlled%20Key&color=brighgreen)

### Description

Traefik is an HTTP reverse proxy and load balancer. Versions prior to 2.11.6, 3.0.4, and 3.1.0-rc3 have a vulnerability that allows bypassing IP allow-lists via HTTP/3 early data requests in QUIC 0-RTT handshakes sent with spoofed IP addresses. Versions 2.11.6, 3.0.4, and 3.1.0-rc3 contain a patch for this issue. No known workarounds are available.

### POC

#### Reference
- https://github.com/traefik/traefik/security/advisories/GHSA-gxrv-wf35-62w9

#### Github
- https://github.com/MWedl/http3-ip-spoofing