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CVE-2023-47106

Incorrect processing of fragment in the URL leads to Authorization Bypass in Traefik

Published: Dec 4, 2023Updated: Nov 21, 2024 Sources: CVE List NVD GHSACWE-20
NVD MITRE
4.8CVSSMEDIUM
EPSS Score
0.6%
Top 54.8%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-20NVD-CWE-Other

Affected Products

traefiktraefik
On-prem
Networking Infrastructure / load-balancer-proxy
github.com/traefik/traefik/v2GoOSS Libraries
github.com/traefik/traefik/v3GoOSS Libraries
traefikoss-projectNetworking Infrastructureaka traefik enterprise
gopackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://datatracker.ietf.org/doc/html/rfc7230#section-5.3.1
datatracker.ietf.org
https://github.com/traefik/traefik/releases/tag/v2.10.6
github.com
https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5
github.com
and 3 more references View all →

Timeline

Published
Dec 4, 2023
Last Updated
Nov 21, 2024

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