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Security-focused static analysis for Elixir & the Phoenix framework
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lib/sobelow/traversal/send_file.ex
defmodule Sobelow.Traversal.SendFile do
@moduledoc """
# Directory Traversal in `send_file`
This submodule checks for directory traversal vulnerabilities in the
`send_file` function.
Ensure that the path passed to `send_file` is not user-controlled.
Send File checks can be ignored with the following command:
$ mix sobelow -i Traversal.SendFile
"""
@uid 21
@finding_type "Traversal.SendFile: Directory Traversal in `send_file`"
use Sobelow.Finding
def run(fun, meta_file) do
confidence = if !meta_file.is_controller?, do: :low
Finding.init(@finding_type, meta_file.filename, confidence)
|> Finding.multi_from_def(fun, parse_def(fun))
|> Enum.each(&Print.add_finding(&1))
end
## send_file(conn, status, file, offset \\ 0, length \\ :all)
def parse_def(fun) do
Parse.get_fun_vars_and_meta(fun, 2, :send_file, :Conn)
end
end