Traefik vulnerable to potential DDoS via ACME HTTPChallenge

中 5.9CVE-2023-47124 · GHSA-8g85-whqh-cr2f · GO-2023-2381 · 04/12/2023 公開 · 17/06/2026 更新

要点

CVE-2023-47124 は github.com/traefik/traefik, github.com/traefik/traefik/v2, github.com/traefik/traefik/v3 に影響する深刻度「中」 (CVSS 5.9) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.79%（全脆弱性の 56.3% より高い）。
対処：2.10.6, 3.0.0-beta5 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
github.com/traefik/traefik Go	`全バージョン`	修正版なし
github.com/traefik/traefik/v2 Go	`< 2.10.6`	`2.10.6`
github.com/traefik/traefik/v3 Go	`< 3.0.0-beta5`	`3.0.0-beta5`
traefik traefik	`= 3.0.0≤ 2.10.5`	修正版なし

概要

Impact

There is a potential vulnerability in Traefik managing the ACME HTTP challenge.

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 (slowloris attack).

Patches

Workarounds

Replace the HTTPChallenge with the TLSChallenge or the DNSChallenge.

For more information

If you have any questions or comments about this advisory, please open an issue.

NVD の説明

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`.