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Fedora: fwupd, FSF, ABRT and Plans to Use GCC Security Hardening Flags by Default

Submitted by Roy Schestowitz on Wednesday 13th of March 2019 11:24:36 AM Filed under
Red Hat
  • A fwupd client side certificate

    In the soon-to-be-released fwupd 1.2.6 there’s a new feature that I wanted to talk about here, if nothing else to be the documentation when people find these files and wonder what they are. The fwupd daemon now creates a PKCS-7 client self-signed certificate at startup (if GnuTLS is enabled and new enough) – which creates the root-readable /var/lib/fwupd/pki/secret.key and world-readable /var/lib/fwupd/pki/client.pem files.

    These certificates are used to sign text data sent to a remote server. At the moment, this is only useful for vendors who also have accounts on the LVFS, so that when someone in their QA team tests the firmware update on real hardware, they can upload the firmware report with the extra --sign argument to sign the JSON blob with the certificate. This allows the LVFS to be sure the report upload comes from the vendor themselves, and will in future allow the trusted so-called attestation DeviceChecksums a.k.a. the PCR0 to be set automatically from this report. Of course, the LVFS user needs to upload the certificate to the LVFS to make this work, although I’ve written this functionality and am just waiting for someone to review it.

  • New FAF 2.0.0 released

    The latest release of FAF comes with two major changes.

    The first one is that we’ve decided to drop the support of Python2 code.
    The second one is an abandonment of YUM in favour of DNF.

    Since release 1.3.4 we’ve also migrated from fedmsg to fedora-messaging infrastructure.

  • Ernestas Kulik: Reporting problems in Flatpak applications

    If you’ve ever experienced a crash in a Flatpak application, you might have noticed that there is no notification coming from ABRT for it, and maybe you even noticed some strange messages in the system journal:

    abrt-server[…]: Unsupported container technology
    The above appears when ABRT attempts to collect information about the container (currently only Docker and LXC), if the binary has been detected to have been run in one. For Flatpak applications, we probably get enough information already, so we can just special-case and do nothing instead.

    Unfortunately, getting things like stack traces gets a bit more complicated than that.

  • Fedora 31 Plans To Use GCC Security Hardening Flags By Default

    Fedora 31 will likely be enabling various GCC security hardening flags by default in trying to further enhance the security of the software in its repositories and those building software on their own Fedora systems.

    While Fedora generally leads the way with low-level innovations to the Linux stack thanks to Red Hat, in this case they are a bit behind the ball for enabling these GCC security hardening flags. In fact, the flags they are planning to use by default are already the defaults on Ubuntu.

    With Fedora 31 they would enable "-Wformat -Wformat-security -fstack-protector-strong" flags by default for checking printf/scanf calls to ensure a proper format string is specified and conversions are correct, warning about possible security problems for the formatted printing, and additional stack protector protections.

»

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