Improper Control of Resources Affecting github.com/traefik/traefik/v2/pkg/middlewares/auth Open this link in a new tab package, versions <2.4.13
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4 Aug 2021
4 Aug 2021
How to fix?
github.com/traefik/traefik/v2/pkg/middlewares/auth to version 2.4.13 or higher.
github.com/traefik/traefik/v2/pkg/middlewares/auth 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.