/usr/lib/ruby/vendor_ruby/ is in ruby-knife-acl 1.0.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/chef/
/usr/lib/ruby/vendor_ruby/chef/knife/
/usr/lib/ruby/vendor_ruby/knife-acl/
/usr/lib/ruby/vendor_ruby/chef/knife/acl_add.rb
/usr/lib/ruby/vendor_ruby/chef/knife/acl_base.rb
/usr/lib/ruby/vendor_ruby/chef/knife/acl_bulk_add.rb
/usr/lib/ruby/vendor_ruby/chef/knife/acl_bulk_remove.rb
/usr/lib/ruby/vendor_ruby/chef/knife/acl_remove.rb
/usr/lib/ruby/vendor_ruby/chef/knife/acl_show.rb
/usr/lib/ruby/vendor_ruby/chef/knife/group_add.rb
/usr/lib/ruby/vendor_ruby/chef/knife/group_create.rb
/usr/lib/ruby/vendor_ruby/chef/knife/group_destroy.rb
/usr/lib/ruby/vendor_ruby/chef/knife/group_list.rb
/usr/lib/ruby/vendor_ruby/chef/knife/group_remove.rb
/usr/lib/ruby/vendor_ruby/chef/knife/group_show.rb
/usr/lib/ruby/vendor_ruby/chef/knife/user_dissociate.rb
/usr/lib/ruby/vendor_ruby/chef/knife/user_invite_add.rb
/usr/lib/ruby/vendor_ruby/chef/knife/user_invite_list.rb
/usr/lib/ruby/vendor_ruby/chef/knife/user_invite_recind.rb
/usr/lib/ruby/vendor_ruby/knife-acl/version.rb