DigiOz Guestbook version 1.7 Path Disclosure Vulnerability in list.php

[jesper.jurcenoks () netvigilance com]

DigiOz Guestbook version 1.7 Path Disclosure Vulnerability in list.php


Description:

The DigiOz Guestbook is a PHP driven guestbook system. The vulnerability exists in list.php script which allows remote 
attackers to obtain sensitive information via an HTTP request to list.php that contains wrong value in page parameter. 
This causes sensitive information to be leaked in an error message.

External References:
Mitre CVE: CVE-2006-5651 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5651
NVD NIST : http://nvd.nist.gov/nvd.cfm?cvename=CVE-2006-5651
OSVDB : 29985 http://www.osvdb.com/displayvuln.php?osvdb_id=29985

Vulnerable Systems:
DigiOz Guestbook version 1.7 and earlier
http://www.digioz.com/phpscripts.php 

Non-Vulnerable Systems:
DigiOz Guestbook version 1.7.1 and later
http://www.digioz.com/phpscripts.php 

Summary:
DigiOz Guestbook is a popular Open-Source guestbook system for easy embedding into your own web-site.
A security problem in the product allows attackers to gather the true path of the server-side script.

Release Date:
November 2 2006

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

Vendor Status: The Vendor has been notified and has released a new version DigiOz Guestbook 1.7.1 that fixed the 
problem. 

Patch can be downloaded here : http://www.digioz.com/guestbook/guestbook_v1_7_1.zip


Severity Metrics:

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: Official Fix
Report Confidence: confirmed


Vulnerability Impact: Attack
Host Impact: Path disclosure.


Example:

HTTP REQUEST http://[TARGET]/[DigiOz Guestbook-directory]/list.php?page=%60&order=asc

REPLY
...
toolbar.jpg" height="20"></td></tr><tr><td><b>Date: </b><br />
<b>Notice</b>:  Undefined offset:  11 in <b>D:\WWWRoot\<username>\list.php</b> on line <b>78</b><br />
<br />
<b>Fatal error</b>:  Call to a member function showDate() on a non-object in <b>D:\WWWRoot\<username>\list.php</b> on 
line <b>78</b><br />
...

URL of Original Advisory: http://www.netvigilance.com/advisory0005 

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