The other two points significantly complicated the exploit beyond what is found in Various internal Windows and Javascript structures had to be adjusted for 32-bit. The first point was a relatively easy one to deal with. I wanted it to execute a shellcode payload rather than simply a command via Into Windows Defender Exploit Guard today).ģ. Pivot protection, EAF+, SimExec and CallerCheck (EMET 5.5 in Windows 7 but built I wanted it to bypass the advanced exploit mitigation features such as stack I wanted to write an exploit that woulld work on 32-bit (as this is theĭefault IE used on Windows 7 and 8.1 and thus makes the exploit more practical).Ģ. My motivation in creating my own variation of this exploit was threefold:ġ. The creation of the exploit (especially as it relates to exploit mitigation RCX, RDX, R8 and R9) no stack pivot is needed, and this drastically simplifies Since it is on 64-bit (the first 4 parameters are in Ret2libc style attack with a RIP hijack to NTDLL.DLL!NtContinue which thenĬalls KERNE元2.DLL!WinExec. Maxspl0it's variation of this exploit works on IE 8-11 64-bit. The original public 64-bit variation of this exploit was written by maxspl0it Of Internet Explorer but its load/usage can still be coerced (and thus exploited)Ī high quality description of this exploit can be found on F-Secure's blog at: Javascript engine (jscript.dll) in Windows. This is a 32-bit re-creation of CVE-2020-067, a vulnerability in the legacy # Original (64-bit) exploit credits: maxpl0it # Bypasses: DEP, ASLR, EMET 5.5 (EAF, EAF+, stack pivot protection, SimExec, CallerCheck) # Tested on: Windows 7 圆4 and Windows 7 x86 # Exploit Title: Microsoft Internet Explorer 11 32-bit - Use-After-Free
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