CVE-2022-39271: Traefik HTTP/2 connections management could cause a denial of service
First published: Tue Oct 11 2022(Updated: )
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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Traefik Traefik | <2.8.8 | |
| Traefik Traefik | =2.9.0-rc1 | |
| Traefik Traefik | =2.9.0-rc2 | |
| Traefik Traefik | =2.9.0-rc3 | |
| Traefik Traefik | =2.9.0-rc4 |
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Reference Links
Frequently Asked Questions
What is CVE-2022-39271?
CVE-2022-39271 is a vulnerability in Traefik that could cause a hanging HTTP/2 server connection due to a subsequent fatal error.
What is the severity of CVE-2022-39271?
CVE-2022-39271 has a severity score of 7.5, which is classified as high.
Which versions of Traefik are affected by CVE-2022-39271?
Versions up to and excluding 2.8.8, 2.9.0-rc1, 2.9.0-rc2, 2.9.0-rc3, and 2.9.0-rc4 of Traefik are affected by CVE-2022-39271.
How can the hanging HTTP/2 server connection issue be fixed?
To fix the hanging HTTP/2 server connection issue, update Traefik to version 2.8.8 or higher.
Are there any references related to CVE-2022-39271?
Yes, you can find more information about CVE-2022-39271 in the Traefik GitHub releases page: [https://github.com/traefik/traefik/releases/tag/v2.8.8](https://github.com/traefik/traefik/releases/tag/v2.8.8) and [https://github.com/traefik/traefik/releases/tag/v2.9.0-rc5](https://github.com/traefik/traefik/releases/tag/v2.9.0-rc5), and in the Traefik security advisories: [https://github.com/traefik/traefik/security/advisories/GHSA-c6hx-pjc3-7fqr](https://github.com/traefik/traefik/security/advisories/GHSA-c6hx-pjc3-7fqr).
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