GHSA-8g85-whqh-cr2fMediumCVSS 5.9
Traefik vulnerable to potential DDoS via ACME HTTPChallenge
🔗 CVE IDs covered (1)
📋 Description
Impact
There is a potential vulnerability in Traefik managing the ACME HTTP challenge.
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 (slowloris attack).
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 or the DNSChallenge.
For more information
If you have any questions or comments about this advisory, please open an issue.
🎯 Affected products2
- go/github.com/traefik/traefik/v2:< 2.10.6
- go/github.com/traefik/traefik/v3:< 3.0.0-beta5
🔗 References (9)
- 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/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
- https://github.com/advisories/GHSA-8g85-whqh-cr2f