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

2023-12-0420:20:30

CWE-772

GitHub_M

www.cve.org

traefik

httpchallenge

dos vulnerability

patched

version 2.10.6

version 3.0.0-beta5

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

0.001 Low

EPSS

Percentile

42.2%

JSON

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.

CNA Affected

[
  {
    "vendor": "traefik",
    "product": "traefik",
    "versions": [
      {
        "version": "< 2.10.6",
        "status": "affected"
      },
      {
        "version": ">= 3.0.0-beta1, < 3.0.0-beta5",
        "status": "affected"
      }
    ]
  }
]