TmaxSoft JEUS - Alternate Data Streams File Disclosure

Title: TmaxSoft JEUS Alternate Data Streams Vulnerability
Author: Simon Ryeo(bar4mi (at) gmail)
Severity: High
Impact: Remote File Disclosure
Vulnerable Version: < JEUS 5: Fix#26 on NTFS
References:
 - http://www.microsoft.com/technet/security/bulletin/ms98-003.mspx
 - http://www.tmaxsoft.com
 - http://www.tmax.co.kr/tmaxsoft/index.screen
History:
 - 10.22.2008: Initiate notify
 - 10.23.2008: The vendor responded
 - 11.21.2008: The vendor replied detail information.
 - 12.12.2008: The vendor finished the preparation for patches and
responses.

Description:
On NTFS TmaxSoft JEUS, which is an famous web application server, contained
a vulnerability that allows an attacker to obtain web application source
files. This was caused by ADSs(Alternate Data Streams; ::$DATA).
JEUS couldn't handle ::$DATA. So it treated test.jsp::$DATA as an normal
file when it requested.
This is similar to the past MS Windows IIS vulnerability(Bid 0149).

Exploit:
The attacker can obtain them easily using an URL request.
http://www.target.com/foo/bar.jsp::$DATA

Solution:
The vendor released solutions for this problem.
Method 1) Upgrade JEUS
 - JEUS 5:
http://technet.tmax.co.kr/kr/download/platformList.do?groupCode=WAS&product
Code=Jeus&versionCode=5.0.0.26.P&fc=down&sc=down_product&mid=binary
 - JEUS 4:
    a. Use to change WebtoB function
    b. Upgrade JEUS to version 6 (the service for version 4 will be out of
service after Dec 2009)
Method 2) Use to change WebtoB fuction
 - Change the message communication method from 'URI' to 'EXT'
   (This is valid whether you use the embed WebtoB to JEUS or the single
WebtoB)
Method 3) Install the patch (ex. jext.jar)
 - The patch file will be valid until Jan. 2009
   (Target version: 3.3.7.15, 4.0, 4.1, 4.2 final, 5.x(each verison will be
offered below Fix#26)

Please refer to TmaxSoft Homepage for detail support palns. It will be
valid until Mar. 2009.
(http://www.tmaxsoft.com)

# milw0rm.com [2008-12-12]