[SNS Advisory No.44] Trend Micro OfficeScan Corporate Edition(Virus Buster Corporate Edition) Configuration File Disclosure Vulnerability

["snsadv () lac co jp" <snsadv () lac co jp>]

----------------------------------------------------------------------
SNS Advisory No.44
Trend Micro OfficeScan Corporate Edition(Virus Buster Corporate Edition) Configuration File Disclosure Vulnerability

Problem first discovered: Wed, 29 Aug 2001
Published: Tue, 16 Oct 2001
----------------------------------------------------------------------

Overview:
---------
  A vulnerability was discovered in Trend Micro OfficeScan Corporate
  Edition (Japanese version: Virus Buster Corporate Edition) that allows
  remote attackers to access configuration files containing passwords.

Problem Description:
--------------------
  Trend Micro OfficeScan Corporate Edition (Japanese version: Virus 
  Buster Corporate Edition) is an antivirus software for enterprise use.
  This software provides real-time management, real-time configuration
  and updates pattern files on client machines from management console.

  When this software is installed, several virtual directories are 
  created in order to provide Web-based management console function.  
  However, attackers will be able to access one of these directories, 
  /officescan/hotdownload, without authentication.  In addition, the 
  file stored in this directory, ofcscan.ini, is the configuration file
  used by OfficeScan Corporate Edition. 

  If this vulnerability is exploited, an attacker will be able to gain 
  access to the configuration information from this file. Moreover, 
  although this file stores an encrypted password, it is possible to 
  decrypt it easily. For example, OfficeScan Corporate Edition has 
  encrypted the following character sequences, "12345":

     701F702132

  This string is generated by a specific algorithm and it is possible 
  to decrypt it easily.  If an application uses a duplicated password, 
  an attacker will be able to cause further impacts on the system.


Tested Versions:
----------------
  OfficeScan Corporate Edition Ver.3.53
  Virus Buster Corporate Edition Ver.3.53

Tested OS:
----------
  Windows NT 4.0 Server + SP6a [English]
  Windows NT 4.0 Server + SP6a [Japanese]

Solution:
---------
  A patch to fix this issue for Virus Buster Corporate Edition is 
  available at the following URL:

  http://www.trendmicro.co.jp/esolution/solutionDetail.asp?solutionID=3182

  And we asked Trend Micro about the patch for OfficeScan Corporate 
  Edition, however we couldn't get any information.

Discovered by:
--------------
  ARAI Yuu (LAC)  y.arai () lac co jp

Disclaimer:
-----------
 All information in these advisories are subject to change without any 
 advanced notices neither mutual consensus, and each of them is released
 as it is. LAC Co.,Ltd. is not responsible for any risks of occurrences
 caused by applying those information. 

------------------------------------------------------------------
Secure Net Service(SNS) Security Advisory <snsadv () lac co jp>
Computer Security Laboratory, LAC  http://www.lac.co.jp/security/