Improper Control of Resources Affecting github.com/traefik/traefik/v2/pkg/middlewares/headers package, versions <2.4.13


0.0
low
  • Attack Complexity

    High

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  • snyk-id

    SNYK-GOLANG-GITHUBCOMTRAEFIKTRAEFIKV2PKGMIDDLEWARESHEADERS-1536534

  • published

    4 Aug 2021

  • disclosed

    4 Aug 2021

  • credit

    Unknown

How to fix?

Upgrade github.com/traefik/traefik/v2/pkg/middlewares/headers to version 2.4.13 or higher.

Overview

github.com/traefik/traefik/v2/pkg/middlewares/headers is a Cloud Native Application Proxy.

Affected versions of this package are vulnerable to Improper Control of Resources via the handling of the Connection header. If an attacker 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.

Active exploitation of this issue is unlikely, as it requires that a removed header would lead to a privilege escalation.