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Security: Unikernels, Electrum, Spectre and Meltdown, Firejail

Submitted by Roy Schestowitz on Saturday 29th of December 2018 07:02:35 AM Filed under
Security
  • Breaking Up the Crypto-Criminal Bar Brawl

    Unikernels embrace this new model of software provisioning yet enforce it at the same time. They run only one single application per virtual machine (the server). They can not, by design, run other programs on the same server.

    This completely prevents attackers from running their programs on your server. It prevents them from downloading new software onto the server and massively limits their ability to inject malicious content, such as credit card skimming scripts and cryptomining programs.

  • Electrum wallet hack spooks market, causing bitcoin price to plunge again

    Those behind the hack tricked users to download and install a malicious software update. They did so by adding malicious servers to Electrum’s network that if contacted would result in an error message followed by an update client message that linked to an unauthorized GitHub repository.

  • Side-Channel Vulnerability Variants 3a and 4 – Spectre and Meltdown

    On May 21, 2018, new variants of the side-channel central processing unit (CPU) hardware vulnerabilities known as Spectre and Meltdown were publicly disclosed. These variants—known as 3A and 4—can allow an attacker to obtain access to sensitive information on affected systems.

  • Firejail – Securely Run Untrusted Applications in Linux

    Sometimes you may want to use applications that have not been well tested in different environments, yet you must use them. In such cases, it is normal to be concerned about the security of your system. One thing that can be done in Linux is to use applications in a sandbox.

    “Sandboxing” is the ability to run application in a limited environment. That way the application is provided a tighten amount of resources, needed to run. Thanks to application called Firejail, you can safely run untrusted applications in Linux.

    Firejail is a SUID (Set Owner User ID) application that decrease the exposure of security breaches by limiting the running environment of untrusted programs using Linux namespaces and seccomp-bpf.

»

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