bugtraq - REMLAB Web Mech Designer 2.0.5 Path Disclosure Vulnerability

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Date: 27 Nov 2006 17:11:48 -0000
From: jesper.jurcenoks@...vigilance.com
To: bugtraq@...urityfocus.com
Subject: REMLAB Web Mech Designer 2.0.5 Path Disclosure Vulnerability

Description:
REMLAB is a fully fuctional cross-platform web-based Battlemech designer for the tactical board game Battletech. REMLAB is built entirely on HTML, PHP, and JavaScript with AJAX functionality. The vulnerability exists in calculate.php script which allows remote attackers to obtain sensitive information via an HTTP request to calculate.php that contains wrong value in Tonnage parameter. This causes the information to be leaked in an error message.

External References: 
Mitre CVE: CVE-2006-5896 
NVD NIST: CVE-2006-5896
OSVDB: 30264 

Summary: 
REMLAB is a fully fuctional cross-platform web-based Battlemech designer for the tactical board game Battletech. 
A security problem in the product allows attackers to gather the true path of the server-side script. 

Release Date:
November 27 2006

Severity:
Risk: Low

CVSS Metrics
Access Vector: Remote
Access Complexity: Low
Authentication: not-required
Confidentiality Impact: Partial
Integrity Impact: None
Availability Impact: None
Impact Bias: Normal
CVSS Base Score: 2.3

Target Distribution on Internet: Low

Exploitability: Functional Exploit
Remediation Level: Workaround
Report Confidence: Uncorroborated

Vulnerability Impact: Attack
Host Impact: Path disclosure.

SecureScout Testcase ID:
TC 17937

Vulnerable Systems:
REMLAB Web Mech Designer 2.0.5

Vulnerability Type:
Input Validation error - The calculate.php script has a flaw which leads to a Warning. This is an input validation fault when the script is not testing the data passed.

Vendor Status: 
The Vendor has been contacted on November 14th 2006, by email and phone,. Vendor has not responded.
There is no official patch at this time.
Workaround:
Disable warning messages: modify in the php.ini file the following line: display_errors = Off .
Example: 
HTTP REQUEST http://[TARGET]/[REMLAB-directory]/include/calculate.php?Tonnage=%60 
REPLY
...
<b>Warning</b>:  Division by zero in <b D:\WWWRoot\<username>\calculate.php</b> on line <b>438</b><br />
,,0.00,,1,,2,,12,,12,,8,,8,,2,,2,,10,,0.0,,0.0
... 
URL of Original Advisory: http://www.netvigilance.com/advisory0007 

Credits: 
Jesper Jurcenoks
Co-founder netVigilance, Inc
www.netvigilance.com