CVE-2022-39271 Traefik HTTP/2 connections management could cause a denial of service

2022-10-1100:00:00

CWE-400

GitHub_M

www.cve.org

traefik

http/2

denial of service

vulnerability

patch

microservices

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

7.6 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

36.5%

JSON

Traefik (pronounced traffic) is a modern HTTP reverse proxy and load balancer that assists in deploying microservices. There is a potential vulnerability in Traefik managing HTTP/2 connections. A closing HTTP/2 server connection could hang forever because of a subsequent fatal error. This failure mode could be exploited to cause a denial of service. There has been a patch released in versions 2.8.8 and 2.9.0-rc5. There are currently no known workarounds.

CNA Affected

[
  {
    "vendor": "traefik",
    "product": "traefik",
    "versions": [
      {
        "version": " < 2.8.8",
        "status": "affected"
      },
      {
        "version": ">= 2.9.0-rc1, < 2.9.0-rc5",
        "status": "affected"
      }
    ]
  }
]