Results 1 to 13 of 13

Thread: Load Value Injection (LVI) flaws of Intel CPUs described

  1. #1
    HEXUS.admin
    Join Date
    Apr 2005
    Posts
    31,588
    Thanks
    0
    Thanked
    2,019 times in 718 posts

    Load Value Injection (LVI) flaws of Intel CPUs described

    'Reverse Meltdown' attack could facilitate the stealing of sensitive data from Intel SGX enclaves.
    Read more.

  2. #2
    Senior Member
    Join Date
    Aug 2006
    Posts
    2,179
    Thanks
    13
    Thanked
    111 times in 100 posts

    Re: Load Value Injection (LVI) flaws of Intel CPUs described

    Oh look another one....

  3. #3
    MCRN Tachi Ttaskmaster's Avatar
    Join Date
    Nov 2013
    Location
    Reading, UK
    Posts
    6,733
    Thanks
    477
    Thanked
    728 times in 618 posts
    • Ttaskmaster's system
      • Motherboard:
      • Asus X99-PRO USB 3.1
      • CPU:
      • i7 5960X o/c to 4.6GHz
      • Memory:
      • 32GB 3200MHz Crucial Ballistix Tactical Tracer RGB DDR4
      • Storage:
      • Samsung Evo 120GB and Seagate Baracuda 2TB
      • Graphics card(s):
      • Gigabyte G1 GTX980Ti
      • PSU:
      • EVGA Supernova G2 1000W
      • Case:
      • Phanteks Enthoo Luxe wiv perspex window
      • Operating System:
      • Win10 64 Home
      • Monitor(s):
      • Acer Predator XB270HU 1440 IPS GSync 144Hz
      • Internet:
      • 900Mbps Gigaclear WHOOOOOOOOOOOO!!!!!!!!

    Re: Load Value Injection (LVI) flaws of Intel CPUs described

    OMG Intel stuff has flaws and is vunerable to people stealing all your datas.
    Don't nobody buy Intel stuff ever again.....!!
    _______________________________________________________________________
    Quote Originally Posted by Mark Tyson
    like a chihuahua urinating on a towering inferno...

  4. #4
    Senior Member AGTDenton's Avatar
    Join Date
    Jun 2009
    Location
    Bracknell
    Posts
    1,938
    Thanks
    506
    Thanked
    399 times in 286 posts
    • AGTDenton's system
      • Motherboard:
      • ASUS P6T7 WS Supercomputer
      • CPU:
      • Intel Core i7 980
      • Memory:
      • 24GB Corsair Dominator GT
      • Storage:
      • Samsung 860 Pro + HDDs
      • Graphics card(s):
      • Asus 1030
      • PSU:
      • Seasonic X-850W
      • Case:
      • Fractal Design R3
      • Operating System:
      • 10 Pro x64
      • Internet:
      • 70MB using BT line

    Re: Load Value Injection (LVI) flaws of Intel CPUs described

    These have been happening for decades, I've never cared for a single one of them. Stroking my i7 980.

  5. #5
    Senior Member
    Join Date
    May 2014
    Posts
    2,310
    Thanks
    177
    Thanked
    294 times in 215 posts

    Re: Load Value Injection (LVI) flaws of Intel CPUs described

    It's one thing to extract nominal data from a computer in use via memory/cache, it's another to breach the secure enclave that's meant to be so hidden from the overlying software/kernel and extract its information

  6. #6
    Senior Member
    Join Date
    Jun 2013
    Location
    ATLANTIS
    Posts
    1,191
    Thanks
    1
    Thanked
    27 times in 25 posts

    Re: Load Value Injection (LVI) flaws of Intel CPUs described

    severity rating : ..........MEDIUM MEDIUM MEDIUM.

  7. #7
    Senior Member
    Join Date
    Jul 2012
    Location
    By the sea
    Posts
    311
    Thanks
    27
    Thanked
    114 times in 72 posts
    • matts-uk's system
      • Motherboard:
      • Apple iMac
      • CPU:
      • Core i7 3.4Ghz
      • Memory:
      • 12GB DDR3
      • Storage:
      • RAID5 on the twin Xeon server I keep in the airing cupboard
      • Graphics card(s):
      • ATI 7970M
      • Case:
      • A lurvely slimline, all in one aluminium number.
      • Operating System:
      • OSX, Centos, Windows.
      • Monitor(s):
      • 27" LED (Apple), 24" LED (Apple), 2 x 20" TFT Dell
      • Internet:
      • ADSL rubbish

    Re: Load Value Injection (LVI) flaws of Intel CPUs described

    Quote Originally Posted by LSG501 View Post
    Oh look another one....
    https://www.theregister.co.uk/2020/03/09/amd_sidechannel_leak_report/

  8. #8
    RIP Peterb ik9000's Avatar
    Join Date
    Nov 2009
    Posts
    7,314
    Thanks
    1,664
    Thanked
    1,263 times in 947 posts
    • ik9000's system
      • Motherboard:
      • Asus P7H55-M/USB3
      • CPU:
      • i7-870, Prolimatech Megahalems, 2x Akasa Apache 120mm
      • Memory:
      • 4x4GB Corsair Vengeance 2133 11-11-11-27
      • Storage:
      • 2x256GB Samsung 840-Pro, 1TB Seagate 7200.12, 1TB Seagate ES.2
      • Graphics card(s):
      • Gigabyte GTX 460 1GB SuperOverClocked
      • PSU:
      • NZXT Hale 90 750w
      • Case:
      • BitFenix Survivor + Bitfenix spectre LED fans, LG BluRay R/W optical drive
      • Operating System:
      • Windows 7 Professional
      • Monitor(s):
      • Dell U2414h, U2311h 1920x1080
      • Internet:
      • 200Mb/s Fibre and 4G wifi

    Re: Load Value Injection (LVI) flaws of Intel CPUs described

    Quote Originally Posted by matts-uk View Post
    https://www.theregister.co.uk/2020/03/09/amd_sidechannel_leak_report/
    nowhere near the same thing. Plus that, minor thought it was, had already been patched before it hit the news. Patched without performance penalty if I've understood.

    Here note too though that for trusted OS in controlled environments it is a non-issue. Smugly noting that my i7-870 is the generation before this SGX feature was introduced so hopefully I'm unaffected (for once!)

  9. #9
    Senior Member
    Join Date
    Aug 2006
    Posts
    2,179
    Thanks
    13
    Thanked
    111 times in 100 posts

    Re: Load Value Injection (LVI) flaws of Intel CPUs described

    Quote Originally Posted by matts-uk View Post
    https://www.theregister.co.uk/2020/03/09/amd_sidechannel_leak_report/
    As said, nowhere near the same thing....

  10. #10
    Senior Member
    Join Date
    Oct 2006
    Location
    Florida
    Posts
    861
    Thanks
    8
    Thanked
    38 times in 30 posts
    • rob4001's system
      • Motherboard:
      • Gigabyte z97
      • CPU:
      • Xeon 1231 v3
      • Memory:
      • 16GB
      • Storage:
      • Samsung 840 256GB SSD
      • Graphics card(s):
      • Zotac GTX 1660 super
      • PSU:
      • Sliverstone 500w SFX-L
      • Case:
      • Silverstone SG13 mitx
      • Operating System:
      • windows 10 64 bit
      • Monitor(s):
      • Asus 27" 1440p
      • Internet:
      • Comcast 75MB

    Re: Load Value Injection (LVI) flaws of Intel CPUs described

    All theoretical attacks though

  11. #11
    Senior Member
    Join Date
    May 2014
    Posts
    2,310
    Thanks
    177
    Thanked
    294 times in 215 posts

    Re: Load Value Injection (LVI) flaws of Intel CPUs described

    Quote Originally Posted by rob4001 View Post
    All theoretical attacks though
    So there's no point protecting against it until it's exploited in the wild?

    I don't ever intend on having a car crash but i still drive safely and buy car insurance.

  12. #12
    Senior Member cptwhite_uk's Avatar
    Join Date
    Aug 2004
    Posts
    4,107
    Thanks
    468
    Thanked
    551 times in 384 posts
    • cptwhite_uk's system
      • Motherboard:
      • MSI B450i Gaming plus Wifi
      • CPU:
      • AMD Ryzen 3700X
      • Memory:
      • 16Gb DRR4 Trident Z 3200 C16
      • Storage:
      • Adata XPG SX8200 Pro 1Tb NVME SSD
      • Graphics card(s):
      • RTX 3060 Ti 8Gb
      • PSU:
      • Corsair SF600 Gold
      • Case:
      • Ncase M1 v6
      • Operating System:
      • Windows 10 Pro
      • Monitor(s):
      • Dell S2721DGF (2560x1440 144Hz Nano IPS)
      • Internet:
      • Virgin Media 350Mbps

    Re: Load Value Injection (LVI) flaws of Intel CPUs described

    Reverse Meltdown? Will have to ask the wife about that one....

  13. #13
    Senior Member
    Join Date
    Jul 2012
    Location
    By the sea
    Posts
    311
    Thanks
    27
    Thanked
    114 times in 72 posts
    • matts-uk's system
      • Motherboard:
      • Apple iMac
      • CPU:
      • Core i7 3.4Ghz
      • Memory:
      • 12GB DDR3
      • Storage:
      • RAID5 on the twin Xeon server I keep in the airing cupboard
      • Graphics card(s):
      • ATI 7970M
      • Case:
      • A lurvely slimline, all in one aluminium number.
      • Operating System:
      • OSX, Centos, Windows.
      • Monitor(s):
      • 27" LED (Apple), 24" LED (Apple), 2 x 20" TFT Dell
      • Internet:
      • ADSL rubbish

    Re: Load Value Injection (LVI) flaws of Intel CPUs described

    Quote Originally Posted by ik9000 View Post
    nowhere near the same thing.
    To be honest I linked the Register article as a little tongue in cheek prod at the AMD fanbois potentially false sense of security and smugness.

    I don't claim to be an expert on this by any means. I gave up writing assembly code after the MC68K, when I switched to Intel (around 1990). Apart from some hand patching of 80186 and custom Mitel stuff during overseas telecomms testing I haven't had to go lower than a C compiler for the last 25 years - and I am more than happy about that.

    ...But, from what I have read, these 'new' vulnerabilities are all variations on the similar theme of a side-channel attack, whereby high resolution timing is used to exploit CPU code prediction mechanisms, defeating access privileges imposed by the CPU. So while the attacks may be different in implementation and result, they [all] exploit a previously neglected attack vector that is potentially present in most all modern CPUs.

    Absence of evidence is not evidence of absence. The researchers have proven Intel chips are vulnerable because Intel chips were the target of the research. Whatever the researchers have proved, they have not proven that other manufacturers are impervious to similarly crafted attacks.

    Here note too though that for trusted OS in controlled environments it is a non-issue. Smugly noting that my i7-870 is the generation before this SGX feature was introduced so hopefully I'm unaffected (for once!)
    Is there such a thing as a trusted OS? The point about these new side-channel attacks is they highlight that process and memory separation at the OS layer are 'virtual' features that do not survive the physical transition to silicone.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •