VULNERABILITY INTELLIGENCE
CVE-2023-47124
CVSS score5.9 MEDIUM
EPSS probability0.79%
CISA KEVNot currently listed
Published2023-12-04
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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`.
Weakness classification
- security-advisories@github.com: CWE-772
Primary references
- security-advisories@github.com — Product
- security-advisories@github.com — Product
- security-advisories@github.com — Product
- security-advisories@github.com — Release Notes
- security-advisories@github.com — Release Notes
- security-advisories@github.com — Third Party Advisory
- security-advisories@github.com
- af854a3a-2127-422b-91ae-364da2661108 — Product
- af854a3a-2127-422b-91ae-364da2661108 — Product
- af854a3a-2127-422b-91ae-364da2661108 — Product
- af854a3a-2127-422b-91ae-364da2661108 — Release Notes
- af854a3a-2127-422b-91ae-364da2661108 — Release Notes