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Thread: A Big "Oh Shit" Moment for Intel and Intel Users

  1. #1
    Join Date
    Dec 2012
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    1,649

    Default A Big "Oh Shit" Moment for Intel and Intel Users

    It's times like this that I'm glad that I have some in me, and use AMD products. This has the potential to really suck.

    Kernel-memory-leaking Intel processor design flaw forces Linux, Windows redesign

    Performance hits loom, other OSes need fixes


    By John Leyden and Chris Williams 2 Jan 2018 at 19:29

    Updated A fundamental design flaw in Intel's processor chips has forced a significant redesign of the Linux and Windows kernels to defang the chip-level security bug.

    Programmers are scrambling to overhaul the open-source Linux kernel's virtual memory system. Meanwhile, Microsoft is expected to publicly introduce the necessary changes to its Windows operating system in an upcoming Patch Tuesday: these changes were seeded to beta testers running fast-ring Windows Insider builds in November and December.

    Crucially, these updates to both Linux and Windows will incur a performance hit on Intel products. The effects are still being benchmarked, however we're looking at a ballpark figure of five to 30 per cent slow down, depending on the task and the processor model. More recent Intel chips have features ? such as PCID ? to reduce the performance hit. Your mileage may vary.

    Similar operating systems, such as Apple's 64-bit macOS, will also need to be updated ? the flaw is in the Intel x86-64 hardware, and it appears a microcode update can't address it. It has to be fixed in software at the OS level, or go buy a new processor without the design blunder.

    Details of the vulnerability within Intel's silicon are under wraps: an embargo on the specifics is due to lift early this month, perhaps in time for Microsoft's Patch Tuesday next week. Indeed, patches for the Linux kernel are available for all to see but comments in the source code have been redacted to obfuscate the issue.

    However, some details of the flaw have surfaced, and so this is what we know.

    Impact
    It is understood the bug is present in modern Intel processors produced in the past decade. It allows normal user programs ? from database applications to JavaScript in web browsers ? to discern to some extent the layout or contents of protected kernel memory areas.

    The fix is to separate the kernel's memory completely from user processes using what's called Kernel Page Table Isolation, or KPTI. At one point, Forcefully Unmap Complete Kernel With Interrupt Trampolines, aka FUCKWIT, was mulled by the Linux kernel team, giving you an idea of how annoying this has been for the developers.....


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  2. #2
    Join Date
    Feb 2008
    Posts
    194

    Default

    A fundamental flaw they say, in a Jew manufactured chip, yeah sure, it was just a flaw, they didn't mean it, and thats why I run AMD.
    "Not anymore Jews, not anymore." Michael Flynn.

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