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OpenAdvisories
Medium · 5.9 CVE-2023-47124 EUVD-2023-3160GHSA-8g85-whqh-cr2fGO-2023-2381

Denial of service whith ACME HTTPChallenge in Traefik

Published Dec 4, 2023 · Updated Dec 18, 2024 · Assigned by GitHub_M

Vendor: traefik Product: traefik Package: github.com/traefik/traefik Package: github.com/traefik/traefik/v2 Package: github.com/traefik/traefik/v3 Ecosystem: Go

Description

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`.

Affected products

VendorProductAffectedFixed
traefik traefik < 2.10.6, >= 3.0.0-beta1, < 3.0.0-beta5 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

openSUSE

Security tracker ↗
ReleasePackageFixed inAdvisory
openSUSE Tumbleweed traefik 2.10.7-1.1 openSUSE-SU-2024:13506-1
openSUSE Tumbleweed traefik2 2.11.5-1.1 openSUSE-SU-2024:14076-1

Affected packages

EcosystemPackageAffectedFixedRecord
Go github.com/traefik/traefik all versions — GO-2023-2381
Go github.com/traefik/traefik/v2 < 2.10.6 2.10.6 GHSA-8g85-whqh-cr2f
Go github.com/traefik/traefik/v3 < 3.0.0-beta5 3.0.0-beta5 GHSA-8g85-whqh-cr2f

Advisories 2

References