Add latest changes from gitlab-org/security/gitlab@14-3-stable-ee

1 files changed, 37 insertions, 5 deletions

diff --git a/config/initializers_before_autoloader/100_patch_omniauth_oauth2.rb b/config/initializers_before_autoloader/100_patch_omniauth_oauth2.rb
index 760fcba5935..1ede92609a9 100644
--- a/config/initializers_before_autoloader/100_patch_omniauth_oauth2.rb
+++ b/config/initializers_before_autoloader/100_patch_omniauth_oauth2.rb
@@ -1,14 +1,46 @@
 # frozen_string_literal: true
 
+# See https://github.com/omniauth/omniauth-oauth2/blob/v1.7.1/lib/omniauth/strategies/oauth2.rb#L84-L101
+# for the original version of this code.
+#
+# Note: We need to override `callback_phase` directly (instead of using a module with `include` or `prepend`),
+# because the method has a `super` call which needs to go to the `OmniAuth::Strategy` module,
+# and it also deletes `omniauth.state` from the session as a side effect.
+
 module OmniAuth
   module Strategies
     class OAuth2
-      alias_method :original_callback_phase, :callback_phase
-
-      # Monkey patch until PR is merged and released upstream
-      # https://github.com/omniauth/omniauth-oauth2/pull/129
       def callback_phase
-        original_callback_phase
+        error = request.params["error_reason"].presence || request.params["error"].presence
+        # Monkey patch #1:
+        #
+        # Swap the order of these conditions around so the `state` param is verified *first*,
+        # before using the error params returned by the provider.
+        #
+        # This avoids content spoofing attacks by crafting a URL with malicious messages,
+        # because the `state` param is only present in the session after a valid OAuth2 authentication flow.
+        if !options.provider_ignores_state && (request.params["state"].to_s.empty? || request.params["state"] != session.delete("omniauth.state"))
+          fail!(:csrf_detected, CallbackError.new(:csrf_detected, "CSRF detected"))
+        elsif error
+          fail!(error, CallbackError.new(request.params["error"], request.params["error_description"].presence || request.params["error_reason"].presence, request.params["error_uri"]))
+        else
+          self.access_token = build_access_token
+          self.access_token = access_token.refresh! if access_token.expired?
+          super
+        end
+      rescue ::OAuth2::Error, CallbackError => e
+        fail!(:invalid_credentials, e)
+      rescue ::Timeout::Error, ::Errno::ETIMEDOUT => e
+        fail!(:timeout, e)
+      rescue ::SocketError => e
+        fail!(:failed_to_connect, e)
+      # Monkey patch #2:
+      #
+      # Also catch errors from Faraday.
+      # See https://github.com/omniauth/omniauth-oauth2/pull/129
+      # and https://github.com/oauth-xx/oauth2/issues/152
+      #
+      # This can be removed with https://gitlab.com/gitlab-org/gitlab/-/issues/340933
       rescue ::Faraday::TimeoutError, ::Faraday::ConnectionFailed => e
         fail!(:timeout, e)
       end