TLBleed

In this article, we are going to explore the topic of TLBleed in detail. Throughout history, TLBleed has played a crucial role in numerous contexts and situations. From its origins to its relevance today, TLBleed has been the subject of study and debate by experts in the field. Through this article, we will immerse ourselves in the fascinating world of TLBleed, exploring its different facets and discovering its impact on various aspects of society. We will delve into its historical importance, its contemporary implications and future perspectives related to TLBleed.

TLBleed is a cryptographic side-channel attack that uses machine learning to exploit a timing side-channel via the translation look-aside buffer (TLB) on modern microprocessors that use simultaneous multithreading.[1][2] As of June 2018, the attack has only been demonstrated experimentally on Intel processors; it is speculated that other processors may also potentially be vulnerable to a variant of the attack, but no proof of concept has been demonstrated.[3] AMD had indicated that their processors would not be vulnerable to this attack.[4]

The attack led to the OpenBSD project disabling simultaneous multithreading on Intel microprocessors.[2][5] The OpenBSD project leader Theo de Raadt has stated that, while the attack could theoretically be addressed by preventing tasks with different security contexts from sharing physical cores, such a fix is currently impractical because of the complexity of the problem.[2]

See also

References

  1. ^ Williams, Chris (2018-06-22). "Meet TLBleed: A crypto-key-leaking CPU attack that Intel reckons we shouldn't worry about". The Register. Retrieved 2018-06-25.
  2. ^ a b c Varghese, Sam (2018-06-25). "OpenBSD chief de Raadt says no easy fix for new Intel CPU bug". www.itwire.com. Retrieved 2018-06-25.
  3. ^ Halfacree, Gareth (2018-06-25). "Researchers warn of TLBleed Hyper-Threading vuln". bit-tech.net. Retrieved 2018-06-25.
  4. ^ Williams, Chris (2018-06-22). "Meet TLBleed: A crypto-key-leaking CPU attack that Intel reckons we shouldn't worry about". The Register. Retrieved 2018-06-25.
  5. ^ Varghese, Sam (2018-06-21). "OpenBSD disables hyperthreading support for Intel CPUs due to likely data leaks". www.itwire.com. Retrieved 2018-06-25.


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