CVE-2023-47124
MEDIUMTraefik < 2.10.6 and < 3.0.0-beta5 - Denial of Service via HTTPChallenge Slowloris Attack
Title source: llmDescription
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`.
References (8)
Core 8
Core References
Third Party Advisory x_refsource_confirm
https://github.com/traefik/traefik/security/advisories/GHSA-8g85-whqh-cr2f
Product x_refsource_misc
https://doc.traefik.io/traefik/https/acme/#dnschallenge
Product x_refsource_misc
https://doc.traefik.io/traefik/https/acme/#httpchallenge
Product x_refsource_misc
https://doc.traefik.io/traefik/https/acme/#tlschallenge
Release Notes x_refsource_misc
https://github.com/traefik/traefik/releases/tag/v2.10.6
Release Notes x_refsource_misc
https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5
Various Sources x_refsource_misc
https://www.cloudflare.com/learning/ddos/ddos-attack-tools/slowloris
Scores
CVSS v3
5.9
EPSS
0.0079
EPSS Percentile
51.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-772
Status
published
Products (4)
traefik/traefik
3.0.0 beta1 (4 CPE variants)
traefik/traefik
< 2.10.5
traefik/traefik
0 - 2.10.6Go
traefik/traefik
0 - 3.0.0-beta5Go
Published
Dec 04, 2023
Tracked Since
Feb 18, 2026