Bsd.slashdot.org Website Review

openbsd chief de raadt says no easy fix for new intel cpu bug 'tlbleed'. recompiling is unlikely to be a catch-all solution for a recently unveiled intel cpu vulnerability known as tlbleed to the british tech site, the register; the side-channel vulnerability can be theoretically exploited to extract encryption keys and private on twitter that a fix would probably need changes to the core operating system and were likely to involve a ton of work to mitigate (mostly app recompile). but de raadt was not so sanguine. there are people saying you can change the kernel's process scheduler, he told he said that williams was lacking all the details and not thinking it through. they actually have sufficient detail to think it through: the article says the tlb is shared between hyperthreading cpus, and it is unsafe to share between two different contexts. basically you can measure evictions against your own mappings, which indicates the other process is touching memory (you can determine the aliasing factors). different cores of the same multi-core cpu. the feature has been added to all intel cpus released since 2002 and has come enabled by default, with intel citing its performance boost as the main reason for its inclusion. but today, mark kettenis of the openbsd project, said the openbsd team was removing support for intel ht because, by design, this technology just opens the door for more timing attacks. timing attacks are a clas* of cryptographic attacks through which a third-party observer can deduce the content of encrypted data by recording and an*lyzing the time taken to execute cryptographic algorithms. the openbsd team is now stepping in to provide a new setting to disable ht support because many modern machines no longer provide the ability to disable posted by msmash on wednesday march 14, 2018 @12:40pm from the moving-forward dept. several major new features, as well as many smaller improvements and bug fixes. in total, the release incorporates 24105 changes, made by