CWE
772 400
Advisory Published
Advisory Published
Updated

CVE-2023-47124: Denial of service whith ACME HTTPChallenge in Traefik

First published: Mon Dec 04 2023(Updated: )

## Impact There is a potential vulnerability in Traefik managing the ACME HTTP challenge. When Traefik is configured to use the [HTTPChallenge](https://doc.traefik.io/traefik/https/acme/#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](https://www.cloudflare.com/learning/ddos/ddos-attack-tools/slowloris/)). ## Patches - https://github.com/traefik/traefik/releases/tag/v2.10.6 - https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5 ## Workarounds Replace the HTTPChallenge with the [TLSChallenge](https://doc.traefik.io/traefik/https/acme/#tlschallenge) or the [DNSChallenge](https://doc.traefik.io/traefik/https/acme/#dnschallenge). ## For more information If you have any questions or comments about this advisory, please [open an issue](https://github.com/traefik/traefik/issues).

Credit: security-advisories@github.com security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
go/github.com/traefik/traefik/v3<3.0.0-beta5
3.0.0-beta5
go/github.com/traefik/traefik/v2<2.10.6
2.10.6
Traefik Traefik<=2.10.5
Traefik Traefik=3.0.0-beta1
Traefik Traefik=3.0.0-beta2
Traefik Traefik=3.0.0-beta3
Traefik Traefik=3.0.0-beta4

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Frequently Asked Questions

  • What is the impact of CVE-2023-47124?

    The vulnerability allows for a denial of service attack when Traefik is configured to use the ACME HTTP challenge.

  • How does CVE-2023-47124 affect Traefik?

    The vulnerability affects Traefik versions 2.10.6 and earlier, as well as 3.0.0-beta5 and earlier.

  • What is the severity level of CVE-2023-47124?

    The severity level of CVE-2023-47124 is medium with a CVSS score of 5.9.

  • How can I fix CVE-2023-47124?

    To fix the vulnerability, update Traefik to version 2.10.6 or later for Traefik v2, or version 3.0.0-beta5 or later for Traefik v3.

  • Where can I find more information about CVE-2023-47124?

    You can find more information about CVE-2023-47124 at the following references: [link1], [link2], [link3].

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2024 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203