RubySec

Providing security resources for the Ruby community

CVE-2019-9837 (doorkeeper-openid_connect): Doorkeeper::OpenidConnect Open Redirect

ADVISORIES

GEM

doorkeeper-openid_connect

SEVERITY

CVSS v3: 6.1

UNAFFECTED VERSIONS

  • < 1.4.0

PATCHED VERSIONS

  • >= 1.5.4

DESCRIPTION

Doorkeeper::OpenidConnect (aka the OpenID Connect extension for Doorkeeper) 1.4.x and 1.5.x before 1.5.4 has an open redirect via the redirect_uri field in an OAuth authorization request (that results in an error response) with the ‘openid’ scope and a prompt=none value. This allows phishing attacks against the authorization flow.