CVE-2023-47106 Incorrect processing of fragment in the URL leads to Authorization Bypass in Traefik

2023-12-0420:26:36

CWE-20

GitHub_M

www.cve.org

cve-2023-47106

traefik

http proxy

4.8 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

20.7%

JSON

Traefik is an open source HTTP reverse proxy and load balancer. When a request is sent to Traefik with a URL fragment, Traefik automatically URL encodes and forwards the fragment to the backend server. This violates RFC 7230 because in the origin-form the URL should only contain the absolute path and the query. When this is combined with another frontend proxy like Nginx, it can be used to bypass frontend proxy URI-based access control restrictions. This vulnerability has been addressed in versions 2.10.6 and 3.0.0-beta5. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CNA Affected

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