CVE-2023-47106 MEDIUM

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

Vendor Traefik
Product traefik
Weakness CWE-20 · Input validation
Published December 4, 2023
Last update August 2, 2024
View on NVD All CVEs

CVSS base score

4.8/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 4, 2023 CVE published
August 2, 2024 Record updated