Merge branch 'security-DOS_issue_comments_banzai-12-0' into '12-0-stable'

Fix DOS when rendering issue/MR comments

See merge request gitlab/gitlabhq!3171

1 files changed, 5 insertions, 0 deletions

diff --git a/spec/lib/banzai/filter/relative_link_filter_spec.rb b/spec/lib/banzai/filter/relative_link_filter_spec.rb
index 8ff971114d6..a714fa50f5f 100644
--- a/spec/lib/banzai/filter/relative_link_filter_spec.rb
+++ b/spec/lib/banzai/filter/relative_link_filter_spec.rb
@@ -83,6 +83,11 @@ describe Banzai::Filter::RelativeLinkFilter do
     expect { filter(act) }.not_to raise_error
   end
 
+  it 'does not explode with an escaped null byte' do
+    act = link("/%00")
+    expect { filter(act) }.not_to raise_error
+  end
+
   it 'does not raise an exception with a space in the path' do
     act = link("/uploads/d18213acd3732630991986120e167e3d/Landscape_8.jpg  \nBut here's some more unexpected text :smile:)")
     expect { filter(act) }.not_to raise_error