Medium severity · published Dec 4, 2023
CVE-2023-47106
Traefik is an open source HTTP reverse proxy and load balancer
6.5
CVSS
0.6%
EPSS
No
On KEV
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TR
Traefik · Traefik
through 2.10.5; 3.0.0; 3.0.0; 3.0.0; 3.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-47106
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-47106
Not Applicable
https://datatracker.ietf.org/doc/html/rfc7230#section-5.3.1
Release Notes
https://github.com/traefik/traefik/releases/tag/v2.10.6
Release Notes
https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5
Exploit
https://github.com/traefik/traefik/security/advisories/GHSA-fvhj-4qfh-q2hm
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