CVE-2023-47124

Denial of service whith ACME HTTPChallenge in Traefik

Severity Score

5.9

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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`.

Traefik es un equilibrador de carga y proxy inverso HTTP de código abierto. Cuando Traefik está configurado para usar `HTTPChallenge` para generar y renovar los certificados TLS de Let's Encrypt, los atacantes pueden aprovechar el retraso autorizado para resolver el desafío (50 segundos) para lograr un `ataque lento`. Esta vulnerabilidad ha sido parcheada en las versiones 2.10.6 y 3.0.0-beta5. Se recomienda a los usuarios que actualicen. Los usuarios que no puedan actualizar deben reemplazar `HTTPChallenge` con `TLSChallenge` o `DNSChallenge`.

*Credits: N/A

CVSS Scores

NISTv3.1 5.9

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-10-30 CVE Reserved
2023-12-04 CVE Published
2024-11-03 EPSS Updated
2024-11-19 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-772: Missing Release of Resource after Effective Lifetime

CAPEC

References (8)

URL	Tag	Source
https://doc.traefik.io/traefik/https/acme/#dnschallenge	Product
https://doc.traefik.io/traefik/https/acme/#httpchallenge	Product
https://doc.traefik.io/traefik/https/acme/#tlschallenge	Product
https://github.com/traefik/traefik/releases/tag/v2.10.6	Release Notes
https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5	Release Notes
https://github.com/traefik/traefik/security/advisories/GHSA-8g85-whqh-cr2f	Third Party Advisory
ttps://www.cloudflare.com/learning/ddos/ddos-attack-tools/slowloris	Broken Link
https://www.cloudflare.com/learning/ddos/ddos-attack-tools/slowloris	X_refsource_misc

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Traefik Search vendor "Traefik"		Traefik Search vendor "Traefik" for product "Traefik"				<= 2.10.5 Search vendor "Traefik" for product "Traefik" and version " <= 2.10.5"		-		Affected
Traefik Search vendor "Traefik"		Traefik Search vendor "Traefik" for product "Traefik"				3.0.0 Search vendor "Traefik" for product "Traefik" and version "3.0.0"		beta1		Affected
Traefik Search vendor "Traefik"		Traefik Search vendor "Traefik" for product "Traefik"				3.0.0 Search vendor "Traefik" for product "Traefik" and version "3.0.0"		beta2		Affected
Traefik Search vendor "Traefik"		Traefik Search vendor "Traefik" for product "Traefik"				3.0.0 Search vendor "Traefik" for product "Traefik" and version "3.0.0"		beta3		Affected
Traefik Search vendor "Traefik"		Traefik Search vendor "Traefik" for product "Traefik"				3.0.0 Search vendor "Traefik" for product "Traefik" and version "3.0.0"		beta4		Affected