A few weeks ago I decided to install "open-ssh" on a Windows 2019 server for management purpose. The ssh server/client is based on the opensource project and MS implementation source code can be found here Installing ssh is a very easy task, all you have to do is to install the "feature" via powershell: The…
On a dark and stormy night, I was playing with Forshaw's fantastic NTOBJECTMANGER library which, among the millions of things, is able to "disassemble" RPC servers and implement Local RPC calls in .NET. I was looking at "interesting" RPC servers on my Windows 10 1909 machine when my attention was caught by the "XblGameSave.dll" library. This…
Another episode of the series: From XXX to SYSTEM ! This time I will show you how it is possible to gain SYSTEM privileges on a Windows machine (a fully patched Win 10 in our case) with HYPER-V enabled and being a member of the special "Hyper-V Administrators" Windows group. I know what you are…
Hardlinks again! Yes, there are plenty of opportunities to raise your privileges due to incorrect permissions settings when combined with hardlinks in many softwares (MS included) 😉 In this post I'm going to show how to use the DropBoxUpdater service in order to get SYSTEM privileges starting from a simple Windows user. Please note: I'm…
As promised in my previous post , I will show you how to exploit the "Printconfig" dll with a real world example. But what does Apple's iPhone have to do with it?? Well, keep on reading... (sorry no TL;DR) Some time ago, I was looking for possible privileged file operations exploitable via hardlinks. At some…
This post has been written by me and two friends: @splinter_code and 0xea31This is the "unintended" result of a research we did on Juicypotato exploit in order to find a possible bypass on restrictions MS applied in latest Windows versions.We all know that, up to Windows 2016 and Windows 10 1803, it's possible for a…
Arbitrary File overwrite has always been considered as a critical vulnerability because it can lead in the "worst case" to privilege escalation. In Windows systems this usually means impersonating Administrators or SYSTEM. If a standard user is able, through some "exploit", to alter the permissions of special protected files - by granting him modify or…
Some time ago I was playing with the STOPZilla exploit which is very interesting and educational because it shows how you can abuse from an arbitrary write from the userland into the kernel. In this case the exploit will permit us, by altering the EPROCESS structure of the current process, to activate an additional privilege, usually …
In this short post I will show you how to combine Forshaw's Microsoft Windows 10 1809 - LUAFV PostLuafvPostReadWrite SECTION_OBJECT_POINTERS Race Condition Privilege Escalation with Forshaw's Diaghub Collector exploit. The LUAFV exploit has been fixed recently and rumors are stating that the "core" part of the Diaghub collector exploit (the possibility for a standard user to…
In this last period there has been much talk about kerberos delegations abuse, especially the "Resource Based Constrained Delegation". So I started writing this post for my friends @DonkeysTeam but then decided to publish it for a "wider" (just kidding) audience. I won't explain in depth these mechanisms, there are so many articles and blogs…
