Two authenticated code paths interpolated user-controlled input into a
shell command:
- decode_pay_request passed the bolt11 string into _make_local_call,
which ran it via create_subprocess_shell; a crafted /lightning/
decode-pay-req request could execute arbitrary commands. Switch
_make_local_call to create_subprocess_exec with a discrete argv list.
- blitz_cln_unlock interpolated the wallet password into a
cl.hsmtool.sh invocation run through a shell, and logged it in the
clear. shlex.quote the interpolated values and mark the call
sensitive=True.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
