It appears you have not yet registered with our community. To register please click here...

 
Go Back [M] > Madshrimps > WebNews
Intel warns of lazy FP state restoration Intel warns of lazy FP state restoration
FAQ Members List Calendar Search Today's Posts Mark Forums Read


Intel warns of lazy FP state restoration
Reply
 
Thread Tools
Old 15th June 2018, 11:08   #1
[M] Reviewer
 
Stefan Mileschin's Avatar
 
Join Date: May 2010
Location: Romania
Posts: 148,055
Stefan Mileschin Freshly Registered
Default Intel warns of lazy FP state restoration

Living off the state

Chipzilla has warned of another side-channel attack against its Core family processors.

While it is not as bad as Meltdown or Spectre the "Lazy FP state restoration exploitation" sounds like the chip is recovering from a big Sunday afternoon dinner.

Lazy FP state restoration is a means for developers to squeeze additional performance out of compatible Intel processor, but possible for software running on an operating system which uses Lazy FP switching to increase floating-point unit (FPU) performance to obtain access to data it should not, including cryptographic keys.

Amazon's Julian Stecklina and Cyberus Technology's Thomas Prescher found the bug earlier this year, and originally scheduled for public announcement in August until leaks pushed the announcement date up.

The vulnerability is exploitable only when the operating system is configured to use lazy rather than eager FPU switching instructions. For Windows, that was the case up until Microsoft released a patch switching to eager FPU switching earlier this week. Linux kernel version 4.9 is already protected, while backported patches are beginning to land for older but still supported kernel releases.

While the white paper has, Cyberus Technology's announcement claims, been withheld temporarily at Intel's request, anyone running a Core-branded processor or newer is advised to check their operating system or hypervisor for a patch to guard against exploitation of the vulnerability.

https://fudzilla.com/news/pc-hardwar...te-restoration
Stefan Mileschin is offline   Reply With Quote
Reply


Similar Threads
Thread Thread Starter Forum Replies Last Post
Intel warns about installing its chip patch Stefan Mileschin WebNews 0 24th January 2018 19:09
Intel warns of evil end-of-the-world tech Stefan Mileschin WebNews 0 4th August 2017 07:23
Foreign hackers attacked two state election systems, FBI warns Stefan Mileschin WebNews 0 3rd September 2016 06:40
Amazon's got a new app for lazy gift givers Stefan Mileschin WebNews 0 12th December 2014 08:08
Samsung SSD 840 EVO Performance Restoration Software Released jmke WebNews 0 17th October 2014 08:57
Apple's 10-Year Run: where they succeeded and others were too lazy to innovate Stefan Mileschin WebNews 0 18th January 2013 08:07
Apple II Teardown and Restoration Offers a Peek at Computing History Stefan Mileschin WebNews 0 7th June 2012 08:24
Intel Releases Solid-State Drive Toolbox with Intel® SSD Optimizer jmke WebNews 1 26th October 2009 16:24
7300GS is a big, lazy GPU jmke WebNews 0 23rd January 2006 00:55
Plexiglass REstoration IKilledMyAGOIA General Madness - System Building Advice 4 11th March 2004 22:10

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


All times are GMT +1. The time now is 13:27.


Powered by vBulletin® - Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO