---
cve: "CVE-2023-47124"
severity: "MEDIUM"
cvss: 5.9
epss: "79%"
vendor: "traefik"
kev: false
exploited: false
published: "2023-12-04 21:15:33"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-19T17:17:39+02:00"
---

# CVE-2023-47124

> 5.9 MEDIUM · 🧪 PoC

## Beschreibung

Traefik is an open source HTTP reverse proxy and load balancer. When Traefik is configured to use the `HTTPChallenge` to generate and renew the Let's Encrypt TLS certificates, the delay authorized to solve the challenge (50 seconds) can be exploited by attackers to achieve a `slowloris attack`. This vulnerability has been patch in version 2.10.6 and 3.0.0-beta5. Users are advised to upgrade. Users unable to upgrade should replace the `HTTPChallenge` with the `TLSChallenge` or the `DNSChallenge`.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- dae0491b612ae9d706ffa2f0faa941bce00f0c01 (Commit)
- b2bb96390a1f7cf8bcc67838c6cf1cf2638f6113 (Commit)

## Referenzen

- <https://github.com/traefik/traefik/security/advisories/GHSA-8g85-whqh-cr2f>
- <https://doc.traefik.io/traefik/https/acme/#dnschallenge>
- <https://doc.traefik.io/traefik/https/acme/#httpchallenge>
- <https://doc.traefik.io/traefik/https/acme/#tlschallenge>
- <https://github.com/traefik/traefik/releases/tag/v2.10.6>
- <https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5>
- <https://www.cloudflare.com/learning/ddos/ddos-attack-tools/slowloris>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2023-47124) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_