Security update for shim

Announcement ID: SUSE-SU-2020:14490-1
Rating: moderate
References:
Cross-References:
CVSS scores:
  • CVE-2020-10713 ( SUSE ): 8.2 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
  • CVE-2020-10713 ( NVD ): 8.2 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Affected Products:
  • SUSE Linux Enterprise Server 11 SP4
  • SUSE Linux Enterprise Server 11 SP4 LTSS 11-SP4

An update that solves one vulnerability and has two security fixes can now be installed.

Description:

This update for shim fixes the following issues:

Update to the unified shim binary from SUSE Linux Enterprise 15-SP1 (bsc#1168994)

This update addresses the "BootHole" security issue (master CVE CVE-2020-10713), by disallowing binaries signed by the previous SUSE UEFI signing key from booting.

This update should only be installed after updates of grub2, the Linux kernel and (if used) Xen from or after July / August 2020 are applied.

Also fixed:

  • shim-install: install MokManager to \EFI\boot to process the pending MOK request (bsc#1175626, bsc#1175656)

Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

  • SUSE Linux Enterprise Server 11 SP4 LTSS 11-SP4
    zypper in -t patch slessp4-shim-14490=1
  • SUSE Linux Enterprise Server 11 SP4
    zypper in -t patch slessp4-shim-14490=1

Package List:

  • SUSE Linux Enterprise Server 11 SP4 LTSS 11-SP4 (x86_64)
    • shim-15+git47-12.5.1
  • SUSE Linux Enterprise Server 11 SP4 (x86_64)
    • shim-15+git47-12.5.1

References: