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[Launchpad Bug Tracker <1921134@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package shim-signed - 1.33.1~16.04.10

---------------
shim-signed (1.33.1~16.04.10) xenial; urgency=medium

  * Update to shim 15.4-0ubuntu7:
    - Fix load option parsing, and thus fwupd execution (LP: #1929471) (PR #379)
    - Fix occasional crashes in _relocate() on arm64 (LP: #1928010) (PR #383)
    - Fix accidental deletion of RT variables (LP: #1934506) (PR #387)
    - mok: relax the maximum variable size check (LP: #1934780) (PR #369)

shim-signed (1.33.1~16.04.9) xenial; urgency=medium

  * Do not build a dual-signed shim (fixing regression from ~16.04.7), and
    disable verifying fbx64.efi and mmx64.efi certificates as xenial's
    sbverify is unable to (impish works fine)
  * Clean up debhelper log file accidentally imported into git during 16.04.7
    import.

shim-signed (1.33.1~16.04.8) xenial; urgency=medium

  * debian/*.postinst: Unconditionally call grub-install with
    --force-extra-removable, so that the \EFI\BOOT removable path as used in
    cloud images receives the updates.  LP: #1930742.
  * Update to shim 15.4-0ubuntu5:
    - Stop addending vendor dbx to MokListXRT during MokListX mirroring. This
      is causing systems to run out of EFI storage space, or just hang up
      when trying to write it (LP: #1924605) (LP: #1928434)
    - Further relax the check for variable mirroring on non-secureboot systems
      avoiding boot failures on out of space conditons (pull request #372)
    - Don't unhook ExitBootServices() when EBS protection is disabled
      (LP: #1931136) (pull request #378)

shim-signed (1.33.1~16.04.7) xenial; urgency=medium

  * New upstream release 15.4.  LP: #1921134
  * Update packaging to pull fb and mm from shim-signed package as in
    later releases, dropping the runtime dependency on shim.
  * Add download-signed script from linux-signed package
  * Add a versioned dependency on the mokutil that introduces --timeout, and
    call mokutil --timeout -1 so that users don't end up with broken systems
    by missing MokManager on reboot after install.  LP: #1856422.
  * Add versioned dependencies on grub-efi-amd64-signed and grub2-common,
    to ensure we have SBAT-compatible grub.efi and grub 2.04-compatible
    grub-install present when we are installing new shim to the ESP.
  * Include reworked Makefile from devel to better assert the integrity of
    the executables.

 -- Julian Andres Klode <juliank@xxxxxxxxxx>  Fri, 16 Jul 2021 13:04:57
+0200

** Changed in: shim-signed (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1921134

Title:
  SBAT shim 15.4 release

Status in OEM Priority Project:
  Confirmed
Status in shim package in Ubuntu:
  Fix Released
Status in shim-signed package in Ubuntu:
  Fix Released
Status in shim-signed source package in Xenial:
  Fix Released
Status in shim-signed source package in Bionic:
  Fix Committed
Status in shim-signed source package in Focal:
  Fix Released
Status in shim-signed source package in Hirsute:
  Fix Released

Bug description:
  [Impact]

   * New upstream shim release 15.4
   * It includes and enforces SBAT validation

  [Test Plan]

   * https://wiki.ubuntu.com/UEFI/SecureBoot/ShimUpdateProcess/TestPlan

  [Where problems could occur]

   * Upgrading to new shim, without upgrading to the new grub with sbat
  will fail to boot, as grub must include SBAT section.

   * Upgrading to new shim, without upgrading to the new fwupdate with
  sbat will fail to boot, as fwupdate must include SBAT section.

  [Other Info]

   * All patches are dropped, as all got included in the v15.3 upstream release
   * Embedded ephemeral shim certificate is now gone, and archive key is used to sign fb/mm
   * Vendor DBX is included that revokes Boothole & ACPI-bypass vulnerable grubs and shims
   * This upload obsoletes shim-signed-canonical package

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