Description
Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.35 and 3.6.7, there is a potential vulnerability in Traefik ACME TLS certificates' automatic generation: the ACME TLS-ALPN fast path can allow unauthenticated clients to tie up go routines and file descriptors indefinitely when the ACME TLS challenge is enabled. A malicious client can open many connections, send a minimal ClientHello with acme-tls/1, then stop responding, leading to denial of service of the entry point. The vulnerability is fixed in 2.11.35 and 3.6.7.
Problem types
CWE-770: Allocation of Resources Without Limits or Throttling
Product status
>=3.0.0-beta1, < 3.6.7
References
github.com/...raefik/security/advisories/GHSA-cwjm-3f7h-9hwq
github.com/...ommit/e9f3089e9045812bcf1b410a9d40568917b26c3d
github.com/traefik/traefik/releases/tag/v2.11.35
github.com/traefik/traefik/releases/tag/v3.6.7