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OpenBSD General Other questions regarding OpenBSD which do not fit in any of the categories below. |
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CPU's and hardware vulnerabilities
Hi,
I have read this article which talks about bugs in the hardware architecture of Intel Core 2 Duo processors. I am wondering if anyone have some thoughts or knowledge when it comes to other cpu's? Both Intel and AMD that is. Thanks |
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For Intel's CPUs search for "Specification Update" pdfs or something like that.
Example: https://www-ssl.intel.com/content/da...pec-update.pdf As far as I know there are two ways for microcode to be applied. First is with new version of BIOS/UEFI. Second is update by OS, for example in Debian there is microcode in non-free section of official repo: https://packages.debian.org/jessie/intel-microcode You should also know that not every bug in hardware can be fixed by microcode update. |
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Thanks a lot for your info and links e1. This is interesting.
Since the intel-microcode update link is for Debian, and if I understand this correctly, would it be possible to just use a Debian live dvd and do the microcode update for those of us using OpenBSD? I am also trying to get an overview or a picture of the tendency for these bugs to occur with the different cpu models with both Intel and AMD. So if this is possible more input is appreciated. Thanks |
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I don't know about vulnerabilities specifically, but here's an example with
AMD CPU errata The errata section is very long, going from page 13 to 99. I was once alerted to an AMD CPU erratum by a line in an OpenBSD dmesg which said Code:
cpu0: AMD erratum 89 present, BIOS upgrade may be required My sense is that CPU errata are very common and always have been. |
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You can also read article from heise online called "Processor Whispers: About Bugs, Bidders and Batmen" by Andreas Stiller
https://web.archive.org/web/20131207...n-1775150.html Last edited by e1-531g; 12th September 2015 at 09:37 PM. |
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Thank you very much IdOp for useful info. And thank you e1 for the additional link. Both giving me the perspectives I was searching for. Really appreciate it.
Monti |
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