• Douwe Maan's avatar
    Merge branch 'jej-note-search-uses-finder' into 'security' · 12db4cc0
    Douwe Maan authored
    Fix missing Note access checks in by moving Note#search to updated NoteFinder
    
    Split from !2024 to partially solve https://gitlab.com/gitlab-org/gitlab-ce/issues/23867
    
    ## Which fixes are in this MR?
    
     - Potentially untested  
    💣 - No test coverage  
    🚥 - Test coverage of some sort exists (a test failed when error raised)  
    🚦 - Test coverage of return value (a test failed when nil used)  
     - Permissions check tested
    
    ### Note lookup without access check
    
    - [x]  app/finders/notes_finder.rb:13 :download_code check
    - [x]  app/finders/notes_finder.rb:19 `SnippetsFinder`
    - [x]  app/models/note.rb:121 [`Issue#visible_to_user`]
    - [x]  lib/gitlab/project_search_results.rb:113
      - This is the only use of `app/models/note.rb:121` above, but importantly has no access checks at all. This means it leaks MR comments and snippets when those features are `team-only` in addition to the issue comments which would be fixed by `app/models/note.rb:121`.
      - It is only called from SearchController where `can?(current_user, :download_code, @project)` is checked, so commit comments are not leaked.
    
    ### Previous discussions
    - [x] https://dev.gitlab.org/gitlab/gitlabhq/merge_requests/2024/diffs#b915c5267a63628b0bafd23d37792ae73ceae272_13_13 `: download_code` check on commit
    - [x] https://dev.gitlab.org/gitlab/gitlabhq/merge_requests/2024/diffs#b915c5267a63628b0bafd23d37792ae73ceae272_19_19 `SnippetsFinder` should be used
      - `SnippetsFinder` should check if the snippets feature is enabled -> https://gitlab.com/gitlab-org/gitlab-ce/issues/25223
    
    ###  Acceptance criteria met?
    - [x] Tests added for new code
    - [x] TODO comments removed
    - [x] Squashed and removed skipped tests
    - [x] Changelog entry
    - [ ] State Gitlab versions affected and issue severity in description
    - [ ] Create technical debt issue for NotesFinder.
      - Either split into `NotesFinder::ForTarget` and `NotesFinder::Search` or consider object per notable type such as `NotesFinder::OnIssue`. For the first option could create `NotesFinder::Base` which is either inherited from or which can be included in the other two.
      - Avoid case statement anti-pattern in this finder with use of `NotesFinder::OnCommit` etc. Consider something on the finder for this? `Model.finder(user, project)`
      - Move `inc_author` to the controller, and implement `related_notes` to replace `non_diff_notes`/`mr_and_commit_notes`
    
    See merge request !2035
    12db4cc0
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