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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

Snyk CVSS

    Attack Complexity Low
    Privileges Required High
    Scope Changed

    Threat Intelligence

    EPSS 0.11% (44th percentile)
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NVD
5.5 medium

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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.