[nSLUG] Intel Pentium Hyperthreading security risk

George White aa056 at chebucto.ns.ca
Tue May 17 11:28:22 ADT 2005

>From a paper presented at BSDCan 2005 in Ottawa on May 13th, 2005:

"Hyper-Threading, as currently implemented on Intel Pentium Extreme
Edition, Pentium 4, Mobile Pentium 4, and Xeon processors, suffers from a
serious security flaw. This flaw permits local information disclosure,
including allowing an unprivileged user to steal an RSA private key being
used on the same machine. Administrators of multi-user systems are
strongly advised to take action to disable Hyper-Threading immediately;
single-user systems (i.e., desktop computers) are not affected. "


George White <aa056 at chebucto.ns.ca> <gnw3 at acm.org>
189 Parklea Dr., Head of St. Margarets Bay, Nova Scotia  B3Z 2G6


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