GHSA-8g85-whqh-cr2f

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GHSA-8g85-whqh-cr2f

Summary: Traefik vulnerable to potential DDoS via ACME HTTPChallenge

Details: ## Impact There is a potential vulnerability in Traefik managing the ACME HTTP challenge. When Traefik is configured to use the [HTTPChallenge](https://doc.traefik.io/traefik/https/acme/#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 ([slowloris attack](https://www.cloudflare.com/learning/ddos/ddos-attack-tools/slowloris/)). ## Patches - https://github.com/traefik/traefik/releases/tag/v2.10.6 - https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5 ## Workarounds Replace the HTTPChallenge with the [TLSChallenge](https://doc.traefik.io/traefik/https/acme/#tlschallenge) or the [DNSChallenge](https://doc.traefik.io/traefik/https/acme/#dnschallenge). ## For more information If you have any questions or comments about this advisory, please [open an issue](https://github.com/traefik/traefik/issues).

References: https://github.com/traefik/traefik/security/advisories/GHSA-8g85-whqh-cr2f, https://nvd.nist.gov/vuln/detail/CVE-2023-47124, 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, 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