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False positive - ActionDispatch::Http::UploadedFile #1110

shaicoleman opened this Issue Oct 11, 2017 · 1 comment


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shaicoleman commented Oct 11, 2017

An uploaded file parameters will return ActionDispatch::Http::UploadedFile
That object and its tempfile should be safe to access, as they are created by Rails, and not directly from user input.

Rails Version: 5.1.4
Brakeman Version: 4.0.1

Confidence: High
Category: File Access
Check: FileAccess
Message: Parameter value used in file name
Code: FileUtils.move(params.permit(:my_upload => ([:upload])).dig("my_upload", "upload").tempfile.path, "/tmp/new_temp_file")
File: app/controllers/uploads_controller.rb

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presidentbeef Nov 3, 2017


I agree. Will fix.


presidentbeef commented Nov 3, 2017

I agree. Will fix.

@presidentbeef presidentbeef added this to the 4.0.2 milestone Nov 17, 2017

Repository owner locked and limited conversation to collaborators Feb 6, 2018

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