What is CVE-2021-32813?

CVE-2021-32813 is a vulnerability in Traefik, an HTTP reverse proxy and load balancer, prior to version 2.4.13, which could allow for a potential header vulnerability in Traefik's handling of the Connection header.

How severe is CVE-2021-32813?

CVE-2021-32813 has a severity rating of 8.1 (high).

What is the affected software for CVE-2021-32813?

The affected software for CVE-2021-32813 is Traefik versions up to and excluding 2.4.13.

Is active exploitation of CVE-2021-32813 likely?

Active exploitation of CVE-2021-32813 is unlikely as it requires that a removed header would lead to a privilege escalation.

How can I fix CVE-2021-32813?

To fix CVE-2021-32813, update Traefik to version 2.4.13 or later.

Vulnerability/
CVE-2021-32813

high

8.1

CWE

913

3/8/2021

11/8/2021

CVE-2021-32813

First published: Tue Aug 03 2021(Updated: )

Traefik is an HTTP reverse proxy and load balancer. Prior to version 2.4.13, there exists a potential header vulnerability in Traefik's handling of the Connection header. Active exploitation of this issue is unlikely, as it requires that a removed header would lead to a privilege escalation, however, the Traefik team has addressed this issue to prevent any potential abuse. If one has a chain of Traefik middlewares, and one of them sets a request header, then sending a request with a certain Connection header will cause it to be removed before the request is sent. In this case, the backend does not see the request header. A patch is available in version 2.4.13. There are no known workarounds aside from upgrading.

Credit: security-advisories@github.com

Affected Software	Affected Version	How to fix
Traefik Traefik	<2.4.13

Remedy

https://github.com/traefik/traefik/pull/8319/commits/cbaf86a93014a969b8accf39301932c17d0d73f9

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is CVE-2021-32813?
CVE-2021-32813 is a vulnerability in Traefik, an HTTP reverse proxy and load balancer, prior to version 2.4.13, which could allow for a potential header vulnerability in Traefik's handling of the Connection header.
How severe is CVE-2021-32813?
CVE-2021-32813 has a severity rating of 8.1 (high).
What is the affected software for CVE-2021-32813?
The affected software for CVE-2021-32813 is Traefik versions up to and excluding 2.4.13.
Is active exploitation of CVE-2021-32813 likely?
Active exploitation of CVE-2021-32813 is unlikely as it requires that a removed header would lead to a privilege escalation.
How can I fix CVE-2021-32813?
To fix CVE-2021-32813, update Traefik to version 2.4.13 or later.

agent/severity
agent/references
agent/author
agent/weakness
agent/tags
agent/type
agent/event
agent/description
agent/remedy
agent/last-modified-date
agent/softwarecombine
agent/first-publish-date
collector/nvd-index
agent/software-canonical-lookup-request
vendor/traefik
canonical/traefik traefik

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.