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Security-focused static analysis for Elixir & the Phoenix framework
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lib/sobelow/traversal/file_module.ex
defmodule Sobelow.Traversal.FileModule do
use Sobelow.Finding
@file_funcs [
:read,
:read!,
:write,
:write!,
:rm,
:rm!,
:rm_rf,
:open,
:open!,
:chmod,
:chmod!,
:chown,
:chown!,
:mkdir,
:mkdir!,
:mkdir_p,
:mkdir_p!
]
@double_file_funcs [:cp, :copy, :cp!, :copy!, :cp_r, :cp_r!, :ln, :ln!, :ln_s, :ln_s!]
def run(fun, meta_file) do
confidence = if !meta_file.is_controller?, do: :low
Enum.each(@file_funcs ++ @double_file_funcs, fn file_func ->
"Traversal.FileModule: Directory Traversal in `File.#{file_func}`"
|> Finding.init(meta_file.filename, confidence)
|> Finding.multi_from_def(fun, parse_def(fun, file_func))
|> Enum.each(&Print.add_finding(&1))
end)
Enum.each(@double_file_funcs, fn file_func ->
"Traversal.FileModule: Directory Traversal in `File.#{file_func}`"
|> Finding.init(meta_file.filename, confidence)
|> Finding.multi_from_def(fun, parse_second_def(fun, file_func))
|> Enum.each(&Print.add_finding(&1))
end)
end
def parse_def(fun, type) do
Parse.get_fun_vars_and_meta(fun, 0, type, [:File])
end
def parse_second_def(fun, type) do
Parse.get_fun_vars_and_meta(fun, 1, type, [:File])
end
def details() do
Sobelow.Traversal.details()
end
end