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Tuesday, May 18th, 2021

    Time Event
    2:53p
    Security updates for Tuesday
    Security updates have been issued by Debian (chromium, curl, prosody, and ruby-rack-cors), Fedora (dotnet3.1 and dotnet5.0), openSUSE (ibsim and prosody), SUSE (kernel and python3), and Ubuntu (caribou and djvulibre).
    4:33p
    Introducing Site Isolation in Firefox (Mozilla security blog)
    The Mozilla Security Blog announces that there is a new site-isolation mechanism available for testing in the Firefox browser. It's a defense against Meltdown and Spectre exploits.

    This fundamental redesign of Firefox's Security architecture extends current security mechanisms by creating operating system process-level boundaries for all sites loaded in Firefox for Desktop. Isolating each site into a separate operating system process makes it even harder for malicious sites to read another site’s secret or private data.
    9:39p
    [$] The misc control group
    Control groups (cgroups) are meant to limit access to a shared resource among
    processes in the system. One such resource is the values used to specify
    an encrypted-memory region for a virtual machine, such as the address-space
    identifiers (ASIDs) used by the AMD Secure
    Encrypted Virtualization
    (SEV) feature. Vipin Sharma set
    out
    to add a
    control group for these ASIDs back in September; based on the feedback,
    though, he expanded the idea into a controller to track and limit any countable resource.
    The patch set
    became the controller
    for the misc control group
    and has been merged for Linux 5.13.

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