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Linux Security and FUD

Submitted by Roy Schestowitz on Tuesday 29th of June 2021 04:56:30 AM Filed under
Security
  • Intel To Disable TSX By Default On More CPUs With New Microcode

    Intel is going to be disabling Transactional Synchronization Extensions (TSX) by default for various Skylake through Coffee Lake processors with forthcoming microcode updates. Yes, this does mean performance implications for workloads benefiting from TSX. This change has seemingly not been talked about much at all publicly and I just happened to become aware of it when looking through new kernel patches.

    Transactional Synchronization Extensions (TSX) have been around since Haswell for hardware transactional memory support and going off Intel's own past numbers can be around 40% faster in specific workloads or as much 4~5 times faster in database transaction benchmarks. TSX issues have been found in the past such as a possible side channel timing attack that could lead to KASLR being defeated and CVE-2019-11135 (TSX Async Abort) for an MDS-style flaw. Now in 2021 Intel is disabling TSX by default across multiple families of Intel CPUs from Skylake through Coffee Lake.

  • REvil ransomware's new Linux encryptor targets ESXi virtual machines [Ed: This is not a "Linux" issue but some Proprietary Software issue; classic Fear, Uncertainty, Doubt (FUD)/Fear-mongering/Dramatisation in a Microsoft-connected site]

    The REvil ransomware operation is now using a Linux encryptor that targets and encrypts Vmware ESXi virtual machines.

»

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