Onionr/static-data/official-plugins/bigbrother/ministry/ofexec.py

"""Onionr - Private P2P Communication.

Prevent eval/exec/os.system and log it
"""
import base64
import platform

from logger import log as logging
from utils import identifyhome
from onionrexceptions import ArbitraryCodeExec
"""
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.
"""

untrusted_exec = True

def block_system(cmd):
    """Prevent os.system except for whitelisted commands+contexts."""
    logging.warn('POSSIBLE EXPLOIT DETECTED, SEE LOGS')
    logging.warn(f'POSSIBLE EXPLOIT: shell command not in whitelist: {cmd}')
    raise ArbitraryCodeExec('os.system command not in whitelist')


def block_exec(event, info):
    """Prevent arbitrary code execution in eval/exec and log it."""
    # because libraries have stupid amounts of compile/exec/eval,
    # We have to use a whitelist where it can be tolerated
    # Generally better than nothing, not a silver bullet
    if untrusted_exec:
        return
    whitelisted_code = [

                       ]
    whitelisted_source = [
    ]
    home = identifyhome.identify_home()

    code_b64 = base64.b64encode(info[0].co_code).decode()
    if code_b64 in whitelisted_source:
        return

    for source in whitelisted_code:
        if info[0].co_filename.endswith(source):
            return

    if 'plugins/' in info[0].co_filename:
        return

    logging.warn('POSSIBLE EXPLOIT DETECTED, SEE LOGS')
    logging.warn('POSSIBLE EXPLOIT DETECTED: ' + info[0].co_filename)
    logging.warn('Prevented exec/eval. Report this with the sample below')
    logging.warn(f'{event} code in base64 format: {code_b64}')
    raise ArbitraryCodeExec("Arbitrary code (eval/exec) detected.")