Date: Thu, 21 Jun 2018 10:37:54 +0100 From: Stuart Henderson <stu@...cehopper.org> To: oss-security@...ts.openwall.com Cc: secure@...el.com Subject: Re: Intel hyper-threading security issues On 2018/06/21 07:56, Georgi Guninski wrote: > On Wed, Jun 20, 2018 at 12:48:55AM +0400, Loganaden Velvindron wrote: > > Hi all, > > > > OpenBSD has gone ahead and disabled Intel Hyper threading with a > > fairly detailed comment about the reasons behind: > > > > https://firstname.lastname@example.org/msg99141.html > > > > Freebsd: > > https://www.freebsd.org/security/advisories/FreeBSD-SA-05:09.htt.asc > Topic: information disclosure when using HTT > Announced: 2005-05-13 > When running on processors supporting Hyper-Threading Technology, it is > possible for a malicious thread to monitor the execution of another > thread. > V. Solution > > Disable Hyper-Threading Technology on processors that support it. That isn't possible with some BIOS. For example, newer Lenovo machines removed the option apparently due to perceived lack of demand...
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