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Authorization Bypass Affecting github.com/oauth2-proxy/oauth2-proxy/v7/providers package, versions >=7.0.0 <7.1.0

0.0
medium

  • Attack Complexity

    Low

  • Privileges Required

    High

  • Scope

    Changed

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  • snyk-id

    SNYK-GOLANG-GITHUBCOMOAUTH2PROXYOAUTH2PROXYV7PROVIDERS-1089459

  • published

    29 Mar 2021

  • disclosed

    29 Mar 2021

  • credit

    @bohrasd

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Introduced: 29 Mar 2021

CVE-2021-21411 Open this link in a new tab
CWE-285 Open this link in a new tab

How to fix?

Upgrade github.com/oauth2-proxy/oauth2-proxy/v7/providers to version 7.1.0 or higher.

Overview

Affected versions of this package are vulnerable to Authorization Bypass. The --gitlab-group flag for group-based authorization in the GitLab provider stopped working whereby, regardless of the flag settings, authorization was not restricted. Furthermore, for any authenticated users, groups that were set in --gitlab-group were added to the X-Forwarded-Groups header to the upstream application.