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Security-focused static analysis for Elixir & the Phoenix framework
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lib/sobelow/ci/system.ex
defmodule Sobelow.CI.System do
alias Sobelow.Utils
use Sobelow.Finding
def run(fun, filename) do
severity = if String.ends_with?(filename, "_controller.ex"), do: false, else: :low
{vars, params, {fun_name, [{_, line_no}]}} = parse_system_def(fun, :cmd)
Enum.each vars, fn var ->
if Enum.member?(params, var) || var === "conn.params" do
Sobelow.log_finding("Command Injection", severity || :high)
print_sys_finding(line_no, filename, fun_name, fun, var, severity || :high)
else
Sobelow.log_finding("Command Injection", severity || :medium)
print_sys_finding(line_no, filename, fun_name, fun, var, severity || :medium)
end
end
end
def parse_system_def(fun, type) do
Utils.get_fun_vars_and_meta(fun, 0, type, [:System])
end
def print_sys_finding(line_no, filename, fun_name, fun, var, severity) do
Utils.print_finding_metadata(line_no, filename, fun,
fun_name, var, severity,
"Command Injection in `System.cmd`", :cmd, [:System])
end
def get_details() do
Sobelow.CI.details()
end
end