Do not allow localhost url redirection in GitHub Integration

3 files changed, 26 insertions, 3 deletions

diff --git a/lib/gitlab/github_import/client.rb b/lib/gitlab/github_import/client.rb
index a61beafae0d..826b35d685c 100644
--- a/lib/gitlab/github_import/client.rb
+++ b/lib/gitlab/github_import/client.rb
@@ -40,7 +40,7 @@ module Gitlab
       #            otherwise hitting the rate limit will result in a thread
       #            being blocked in a `sleep()` call for up to an hour.
       def initialize(token, per_page: 100, parallel: true)
-        @octokit = Octokit::Client.new(
+        @octokit = ::Octokit::Client.new(
           access_token: token,
           per_page: per_page,
           api_endpoint: api_endpoint
@@ -139,7 +139,7 @@ module Gitlab
 
         begin
           yield
-        rescue Octokit::TooManyRequests
+        rescue ::Octokit::TooManyRequests
           raise_or_wait_for_rate_limit
 
           # This retry will only happen when running in sequential mode as we'll
diff --git a/lib/gitlab/legacy_github_import/client.rb b/lib/gitlab/legacy_github_import/client.rb
index bbdd094e33b..b23efd64dee 100644
--- a/lib/gitlab/legacy_github_import/client.rb
+++ b/lib/gitlab/legacy_github_import/client.rb
@@ -101,7 +101,7 @@ module Gitlab
       # GitHub Rate Limit API returns 404 when the rate limit is
       # disabled. In this case we just want to return gracefully
       # instead of spitting out an error.
-      rescue Octokit::NotFound
+      rescue ::Octokit::NotFound
         nil
       end
 
diff --git a/lib/gitlab/octokit/middleware.rb b/lib/gitlab/octokit/middleware.rb
new file mode 100644
index 00000000000..2f762957d1b
--- /dev/null
+++ b/lib/gitlab/octokit/middleware.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Octokit
+    class Middleware
+      def initialize(app)
+        @app = app
+      end
+
+      def call(env)
+        Gitlab::UrlBlocker.validate!(env[:url], { allow_localhost: allow_local_requests?, allow_local_network: allow_local_requests? })
+
+        @app.call(env)
+      end
+
+      private
+
+      def allow_local_requests?
+        Gitlab::CurrentSettings.allow_local_requests_from_hooks_and_services?
+      end
+    end
+  end
+end