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Advisories

Traefik before 2.11.60 and 3.7.16 ForwardAuth NTLM/Negotiate Identity Leak

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Severity
high
Date
Affecting

  • traefik >= 0, < 2.11.60

  • traefik >= 3.0.0, < 3.7.16

CWE
  • CWE-488 Exposure of Data Element to Wrong Session
CVSS
7.0
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
Credit
mosafariuk
Description
Traefik 2.x before 2.11.60 and 3.x before 3.7.16 sends ForwardAuth subrequests (and, in 3.7, Ingress NGINX auth-url requests) through an auth-server connection pool shared by all clients, exposing connection-bound NTLM or Negotiate authentication. An unauthenticated attacker can reuse another user's authenticated connection, receiving the victim's identity via authResponseHeaders to access backends as that user.

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