diff options
| -rw-r--r-- | app/serializers/diff_line_entity.rb | 2 | ||||
| -rw-r--r-- | changelogs/unreleased/security-fj-stored-xss-in-repository-imports.yml | 5 | ||||
| -rw-r--r-- | lib/gitlab/diff/highlight.rb | 2 | ||||
| -rw-r--r-- | spec/lib/gitlab/diff/highlight_spec.rb | 28 | ||||
| -rw-r--r-- | spec/serializers/diff_line_entity_spec.rb | 45 |
5 files changed, 80 insertions, 2 deletions
diff --git a/app/serializers/diff_line_entity.rb b/app/serializers/diff_line_entity.rb index 2119a1017d3..942714b7787 100644 --- a/app/serializers/diff_line_entity.rb +++ b/app/serializers/diff_line_entity.rb @@ -9,6 +9,6 @@ class DiffLineEntity < Grape::Entity expose :meta_positions, as: :meta_data expose :rich_text do |line| - line.rich_text || CGI.escapeHTML(line.text) + ERB::Util.html_escape(line.rich_text || line.text) end end diff --git a/changelogs/unreleased/security-fj-stored-xss-in-repository-imports.yml b/changelogs/unreleased/security-fj-stored-xss-in-repository-imports.yml new file mode 100644 index 00000000000..7520aa624c7 --- /dev/null +++ b/changelogs/unreleased/security-fj-stored-xss-in-repository-imports.yml @@ -0,0 +1,5 @@ +--- +title: Fix stored XSS in merge requests from imported repository +merge_request: +author: +type: security diff --git a/lib/gitlab/diff/highlight.rb b/lib/gitlab/diff/highlight.rb index 1f012043e56..a605ddb5c33 100644 --- a/lib/gitlab/diff/highlight.rb +++ b/lib/gitlab/diff/highlight.rb @@ -24,7 +24,7 @@ module Gitlab # ignore highlighting for "match" lines next diff_line if diff_line.meta? - rich_line = highlight_line(diff_line) || diff_line.text + rich_line = highlight_line(diff_line) || ERB::Util.html_escape(diff_line.text) if line_inline_diffs = inline_diffs[i] begin diff --git a/spec/lib/gitlab/diff/highlight_spec.rb b/spec/lib/gitlab/diff/highlight_spec.rb index 3c8cf9c56cc..5d0a603d11d 100644 --- a/spec/lib/gitlab/diff/highlight_spec.rb +++ b/spec/lib/gitlab/diff/highlight_spec.rb @@ -8,6 +8,20 @@ describe Gitlab::Diff::Highlight do let(:diff) { commit.raw_diffs.first } let(:diff_file) { Gitlab::Diff::File.new(diff, diff_refs: commit.diff_refs, repository: project.repository) } + shared_examples 'without inline diffs' do + let(:code) { '<h2 onmouseover="alert(2)">Test</h2>' } + + before do + allow(Gitlab::Diff::InlineDiff).to receive(:for_lines).and_return([]) + allow_any_instance_of(Gitlab::Diff::Line).to receive(:text).and_return(code) + end + + it 'returns html escaped diff text' do + expect(subject[1].rich_text).to eq html_escape(code) + expect(subject[1].rich_text).to be_html_safe + end + end + describe '#highlight' do context "with a diff file" do let(:subject) { described_class.new(diff_file, repository: project.repository).highlight } @@ -38,6 +52,16 @@ describe Gitlab::Diff::Highlight do expect(subject[5].rich_text).to eq(code) end + + context 'when no diff_refs' do + before do + allow(diff_file).to receive(:diff_refs).and_return(nil) + end + + context 'when no inline diffs' do + it_behaves_like 'without inline diffs' + end + end end context "with diff lines" do @@ -93,6 +117,10 @@ describe Gitlab::Diff::Highlight do expect { subject }. to raise_exception(RangeError) end end + + context 'when no inline diffs' do + it_behaves_like 'without inline diffs' + end end end end diff --git a/spec/serializers/diff_line_entity_spec.rb b/spec/serializers/diff_line_entity_spec.rb new file mode 100644 index 00000000000..2549f64bcd3 --- /dev/null +++ b/spec/serializers/diff_line_entity_spec.rb @@ -0,0 +1,45 @@ +# frozen_string_literal: true + +require 'spec_helper' + +describe DiffLineEntity do + include RepoHelpers + + let(:code) { 'hello world' } + let(:line) { Gitlab::Diff::Line.new(code, 'new', 1, nil, 1) } + let(:entity) { described_class.new(line, request: {}) } + + subject { entity.as_json } + + it 'exposes correct attributes' do + expect(subject).to include( + :line_code, :type, :old_line, :new_line, :text, :meta_data, :rich_text + ) + end + + describe '#rich_text' do + let(:code) { '<h2 onmouseover="alert(2)">Test</h2>' } + let(:rich_text_value) { nil } + + before do + line.instance_variable_set(:@rich_text, rich_text_value) + end + + shared_examples 'escapes html tags' do + it do + expect(subject[:rich_text]).to eq html_escape(code) + expect(subject[:rich_text]).to be_html_safe + end + end + + context 'when rich_line is present' do + let(:rich_text_value) { code } + + it_behaves_like 'escapes html tags' + end + + context 'when rich_line is not present' do + it_behaves_like 'escapes html tags' + end + end +end |