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from the for-those-who-ask-for-javascript dept.
A very interesting attack was unveiled in Friday, 24 June by Daniel Gruss, Clémentine Maurice, Stefan Mangard. Maybe the Rowhammer is the next Hearthbleed, or worse?
As DRAM has been scaling to increase in density, the cells are less isolated from each other. Recent studies have found that repeated accesses to DRAM rows can cause random bit flips in an adjacent row, resulting in the so called Rowhammer bug. This bug has already been exploited to gain root privileges and to evade a sandbox, showing the severity of faulting single bits for security. However, these exploits are written in native code and use special instructions to flush data from the cache.
In this paper we present Rowhammer.js, a JavaScript-based implementation of the Rowhammer attack. Our attack uses an eviction strategy found by a generic algorithm that improves the eviction rate compared to existing eviction strategies from 95.2% to 99.99%. Rowhammer.js is the first remote software-induced hardware-fault attack. In contrast to other fault attacks it does not require physical access to the machine, or the execution of native code or access to special instructions. As JavaScript-based fault attacks can be performed on millions of users stealthily and simultaneously, we propose countermeasures that can be implemented immediately.
http://arxiv.org/abs/1507.06955
Full report can be found here (PDF)
(Score: 2) by opinionated_science on Wednesday July 29 2015, @01:40PM
inxi -m
Memory: Placeholder: Feature not yet developed
I get this. What am I missing?
(Score: 3, Informative) by Runaway1956 on Wednesday July 29 2015, @03:00PM
Maybe you're using an outdated version?
# inxi --version
inxi 2.2.26-00 (2015-07-06)
If your inxi is up to date, then you are possibly missing some dependency. Then again, it may be a glitch in your OS - I know that inxi couldn't get uptime for awhile after systemd was instituted. Now it works again, so that particular glitch has been addressed.
You might want to address any glitches on the forum - http://techpatterns.com/forums/index.php [techpatterns.com] The top two subforums are dedicated to the inxi-related scripts.
(Score: 2) by opinionated_science on Wednesday July 29 2015, @04:22PM
thanks! I grabbed the latest version from svn, though the debian version is a bit old.
Works fine for me now. Very cool tool.