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Advisories

Traefik 3.2.0 before 3.7.15 FastProxy Data Race Denial of Service

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Severity
high
Date
Affecting

  • traefik >= 3.2.0, < 3.7.15

CWE
  • CWE-567 Unsynchronized Access to Shared Data in a Multithreaded Context
CVSS
8.2
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Description
Traefik from 3.2.0 before 3.7.15 contains a data race in the experimental FastProxy that allows unauthenticated attackers to crash the process by abusing HTTP/1 protocol upgrades. Attackers can repeatedly open and abort upgraded connections such as WebSocket, corrupting the unsynchronized shared bufio.Reader and triggering an unrecovered panic that terminates Traefik.

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