1 files changed, 28 insertions, 0 deletions
diff --git a/spec/requests/user_sends_malformed_strings_spec.rb b/spec/requests/user_sends_malformed_strings_spec.rb
new file mode 100644
index 00000000000..da533606be5
--- /dev/null
+++ b/spec/requests/user_sends_malformed_strings_spec.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'User sends malformed strings' do
+  include GitHttpHelpers
+
+  let(:null_byte) { "\u0000" }
+  let(:invalid_string) { "mal\xC0formed" }
+
+  it 'raises a 400 error with a null byte' do
+    post '/nonexistent', params: { a: "A #{null_byte} nasty string" }
+
+    expect(response).to have_gitlab_http_status(:bad_request)
+  end
+
+  it 'raises a 400 error with an invalid string' do
+    post '/nonexistent', params: { a: "A #{invalid_string} nasty string" }
+
+    expect(response).to have_gitlab_http_status(:bad_request)
+  end
+
+  it 'raises a 400 error with null bytes in the auth headers' do
+    clone_get("project/path", user: "hello#{null_byte}", password: "nothing to see")
+
+    expect(response).to have_gitlab_http_status(:bad_request)
+  end
+end