2 Jan 2018
‘Kernel memory leaking’ Intel processor design flaw forces Linux, Windows redesign • The Register
[url]https://www.theregister.co.uk/2018/01/02/intel_cpu_design_flaw/[/url]
Contextually related:
“In x86, beyond ring 0 lie the more privileged realms of execution, where our code is invisible to AV, we have unfettered access to hardware, and can trivially preempt and modify the OS. The architecture has heaped layers upon layers of protections on these negative rings, but 40 years of x86 evolution have left a labyrinth of forgotten backdoors into the ultra-privileged modes. Lost in this byzantine maze of decades-old architecture improvements and patches, there lies a design flaw that’s gone unnoticed for 20 years. In one of the most bizarre and complex vulnerabilities we’ve ever seen, we’ll release proof-of-concept code exploiting the vast, unexplored wasteland of forgotten x86 features, to demonstrate how to jump malicious code from the paltry ring 0 into the deepest, darkest realms of the processor. Best of all, we’ll do it with an architectural 0-day built into the silicon itself, directed against a uniquely vulnerable string of code running on every single system.”
46:33
29 Dec 2015
The Memory Sinkhole - Unleashing An X86 Design Flaw Allowing Universal Privilege Escalation - YouTube
“A processor is not a trusted black box for running code; on the contrary, modern x86 chips are packed full of secret instructions and hardware bugs. In this talk, we’ll demonstrate how page fault analysis and some creative processor fuzzing can be used to exhaustively search the x86 instruction set and uncover the secrets buried in your chipset.”
44:29
31 Aug 2017
Breaking the x86 Instruction Set - YouTube
2 January 2018
Initial Benchmarks Of The Performance Impact Resulting From Linux’s x86 Security Changes - Phoronix
[url]https://www.phoronix.com/scan.php?page=article&item=linux-415-x86pti&num=1[/url]
3 January 2018
Further Analyzing The Intel CPU “x86 PTI Issue” On More Systems - Phoronix
[url]https://www.phoronix.com/scan.php?page=article&item=linux-more-x86pti&num=1[/url]
3 January 2018
VM Performance Showing Mixed Impact With Linux 4.15 KPTI Patches - Phoronix
[url]https://www.phoronix.com/scan.php?page=article&item=linux-kpti-kvm&num=1[/url]