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Old 01-03-18, 09:41 AM   #1
genec
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Arrrrg. Massive processor flaw leaves both PCs and Macs vulnerable

https://www.pcworld.com/article/3245...ts-pc-mac.html

Apparently AMD processors do not have this flaw.

Damn... remember when Macs used a Motorola processor and wasn't vulnerable to the flaws of PCs... like the old Pentium divide error...

This is what we get by NOT being "diversified."
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Old 01-03-18, 10:08 AM   #2
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yes, this sucks
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Old 01-03-18, 10:36 AM   #3
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This is huge, and hugely bad. Good thing I have one AMD machine and one ARM machine in my stash.
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Old 01-03-18, 10:44 AM   #4
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It is a Local Privilege Escalation, meaning the exploit is only available to someone already logged into the machine.
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Old 01-03-18, 10:46 AM   #5
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Yes, but the patches are going to cause a 20%ish performance hit on everything Intel made in the last several years.
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Old 01-03-18, 10:57 AM   #6
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My director just sent two links about this today:

https://www.theverge.com/2018/1/3/16...-windows-linux

Millions of computers using Intel chips prone to hacking and fix 'slows machines by 30 per cent'

First article says there might be 5% to 30% performance hit depending on the processor model. Anyone remember the math bug on the first pentium 5V processors? Oh well. FIX IT INTEL! ;-)
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Old 01-03-18, 10:57 AM   #7
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wtf 20 percent???? thats crazy
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Old 01-03-18, 11:02 AM   #8
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I also have one Intel machine that is too old for this bug, I think.
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Old 01-03-18, 11:45 AM   #9
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It is a Local Privilege Escalation, meaning the exploit is only available to someone already logged into the machine.
Reading indicated that it was a vulnerability accessible from Java and Cloud based apps from WAN.
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Old 01-03-18, 11:55 AM   #10
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I also have one Intel machine that is too old for this bug, I think.
Oh, you're still running the Pentium, with it's own error?
Pentium FDIV: The processor bug that shook the world | TechRadar
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Old 01-03-18, 11:56 AM   #11
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11-year-old MacBookPro, stuck on 32-bit forever.
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Old 01-03-18, 12:02 PM   #12
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And to think I paid extra to go Intel rather than AMD on my home PC as well as all the ones I built for my lab. There goes that supposed performance advantage.
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Old 01-03-18, 12:51 PM   #13
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And to think I paid extra to go Intel rather than AMD on my home PC as well as all the ones I built for my lab. There goes that supposed performance advantage.
Same here. I used to run AMD, but I did my last build with an i5. D'oh.

AMD seemed to be falling behind for a bit... so it seemed like a good idea... at the time.
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Old 01-03-18, 01:29 PM   #14
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is linux have the same issue?
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Old 01-03-18, 01:44 PM   #15
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is linux have the same issue?
If it is installed on a computer with an Intel processor, yes.
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Old 01-03-18, 02:13 PM   #16
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Yeah, it is the processor that has the flaw... software "fixes" for this are going to require flushing caches and then refilling them, as needed... thus adding steps that otherwise would not be needed... those extra code steps (for just about every damn operation) are what are going to slow the machines down.

Damn Intel...
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Old 01-03-18, 02:37 PM   #17
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Hopefully the fix will fix it..Perhaps by the time Apple rolls the fix out, the speed won't be affected as much.
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Old 01-03-18, 02:57 PM   #18
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Here is an in-depth article on the issue: https://arstechnica.com/gadgets/2018...erous-patches/
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Old 01-03-18, 03:22 PM   #19
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Welp, that's one way to make my AMD processors as fast as Intel.
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Old 01-03-18, 03:30 PM   #20
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Holy. Crap.

That takes skill and ingenuity to screw up so badly.
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Old 01-03-18, 05:12 PM   #21
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yeah, oversight... They had everything focused on inside...
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Old 01-03-18, 06:21 PM   #22
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It gets more complicated.
Two different attacks have been announced, and only one is exclusive to Intel: https://meltdownattack.com/
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Old 01-03-18, 06:46 PM   #23
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Welp, that's one way to make my AMD processors as fast as Intel.
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Old 01-03-18, 09:35 PM   #24
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I have Pentium 4s. I win.
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Old 01-03-18, 09:40 PM   #25
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I can probably figure out things that work better than that. I don't like RPC? for instance. Beef up your firewall and router security while you are at it.


And don't allow other logins.
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