The MS13-022 exploit does not actually run as x64. IE by default
still runs x86 so BES will always automatically select that target.
If IE forces x64 (which can be done manually), the BES detection
code will see it as ARCH_X86_64, and the payload generator will
still end up generating a x86 payload anyway.
If the user actually chooses a x64 payload, such as
windows/x64/meterpreter/reverse_tcp, the exploit is going to crash
because you can't run x64 shellcode on an x86 architecture.
See the complaint on #4039. This doesn't fix that particular
issue (it's somewhat unrelated), but does solve around
a file parsing problem reported by @void-in
This commit changes how os_name and os_flavor are handled
for client-side exploits, matching recent changes to the
server-side exploits and scanner fingerprints.
This commit also updates the client-side fingerprinting to
take into account Windows 8.1 and IE 9, 10, and 11.
Alan Foster