Security update for grub2

SUSE Security Update: Security update for grub2
Announcement ID: SUSE-SU-2021:0679-1
Rating: important
References: #1175970 #1176711 #1177883 #1179264 #1179265 #1182057 #1182262 #1182263
Cross-References:CVE-2020-14372 CVE-2020-25632 CVE-2020-25647 CVE-2020-27749 CVE-2020-27779 CVE-2021-20225 CVE-2021-20233
Affected Products:
  • SUSE OpenStack Cloud 7
  • SUSE Linux Enterprise Server for SAP 12-SP2
  • SUSE Linux Enterprise Server 12-SP2-LTSS
  • SUSE Linux Enterprise Server 12-SP2-BCL

An update that solves 7 vulnerabilities and has one errata is now available.

Description:

This update for grub2 fixes the following issues:
grub2 now implements the new "SBAT" method for SHIM based secure boot revocation. (bsc#1182057)
Following security issues are fixed that can violate secure boot constraints:

  • CVE-2020-25632: Fixed a use-after-free in rmmod command (bsc#1176711)
  • CVE-2020-25647: Fixed an out-of-bound write in grub_usb_device_initialize() (bsc#1177883)
  • CVE-2020-27749: Fixed a stack buffer overflow in grub_parser_split_cmdline (bsc#1179264)
  • CVE-2020-27779, CVE-2020-14372: Disallow cutmem and acpi commands in secure boot mode (bsc#1179265 bsc#1175970)
  • CVE-2021-20225: Fixed a heap out-of-bounds write in short form option parser (bsc#1182262)
  • CVE-2021-20233: Fixed a heap out-of-bound write due to mis-calculation of space required for quoting (bsc#1182263)

grub2 was bumped to version 2.02, same as SUSE Linux Enterprise 12 SP3.

Patch Instructions:

To install this SUSE Security 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 OpenStack Cloud 7:
    zypper in -t patch SUSE-OpenStack-Cloud-7-2021-679=1
  • SUSE Linux Enterprise Server for SAP 12-SP2:
    zypper in -t patch SUSE-SLE-SAP-12-SP2-2021-679=1
  • SUSE Linux Enterprise Server 12-SP2-LTSS:
    zypper in -t patch SUSE-SLE-SERVER-12-SP2-2021-679=1
  • SUSE Linux Enterprise Server 12-SP2-BCL:
    zypper in -t patch SUSE-SLE-SERVER-12-SP2-BCL-2021-679=1

Package List:

  • SUSE OpenStack Cloud 7 (s390x x86_64):
    • grub2-2.02-115.59.1
    • grub2-debuginfo-2.02-115.59.1
    • grub2-debugsource-2.02-115.59.1
  • SUSE OpenStack Cloud 7 (noarch):
    • grub2-snapper-plugin-2.02-115.59.1
    • grub2-systemd-sleep-plugin-2.02-115.59.1
  • SUSE OpenStack Cloud 7 (x86_64):
    • grub2-i386-pc-2.02-115.59.1
    • grub2-x86_64-efi-2.02-115.59.1
    • grub2-x86_64-xen-2.02-115.59.1
  • SUSE OpenStack Cloud 7 (s390x):
    • grub2-s390x-emu-2.02-115.59.1
  • SUSE Linux Enterprise Server for SAP 12-SP2 (ppc64le x86_64):
    • grub2-2.02-115.59.1
    • grub2-debuginfo-2.02-115.59.1
  • SUSE Linux Enterprise Server for SAP 12-SP2 (ppc64le):
    • grub2-powerpc-ieee1275-2.02-115.59.1
  • SUSE Linux Enterprise Server for SAP 12-SP2 (x86_64):
    • grub2-debugsource-2.02-115.59.1
    • grub2-i386-pc-2.02-115.59.1
    • grub2-x86_64-efi-2.02-115.59.1
    • grub2-x86_64-xen-2.02-115.59.1
  • SUSE Linux Enterprise Server for SAP 12-SP2 (noarch):
    • grub2-snapper-plugin-2.02-115.59.1
    • grub2-systemd-sleep-plugin-2.02-115.59.1
  • SUSE Linux Enterprise Server 12-SP2-LTSS (ppc64le s390x x86_64):
    • grub2-2.02-115.59.1
    • grub2-debuginfo-2.02-115.59.1
  • SUSE Linux Enterprise Server 12-SP2-LTSS (s390x x86_64):
    • grub2-debugsource-2.02-115.59.1
  • SUSE Linux Enterprise Server 12-SP2-LTSS (ppc64le):
    • grub2-powerpc-ieee1275-2.02-115.59.1
  • SUSE Linux Enterprise Server 12-SP2-LTSS (x86_64):
    • grub2-i386-pc-2.02-115.59.1
    • grub2-x86_64-efi-2.02-115.59.1
    • grub2-x86_64-xen-2.02-115.59.1
  • SUSE Linux Enterprise Server 12-SP2-LTSS (noarch):
    • grub2-snapper-plugin-2.02-115.59.1
    • grub2-systemd-sleep-plugin-2.02-115.59.1
  • SUSE Linux Enterprise Server 12-SP2-LTSS (s390x):
    • grub2-s390x-emu-2.02-115.59.1
  • SUSE Linux Enterprise Server 12-SP2-BCL (noarch):
    • grub2-snapper-plugin-2.02-115.59.1
    • grub2-systemd-sleep-plugin-2.02-115.59.1
  • SUSE Linux Enterprise Server 12-SP2-BCL (x86_64):
    • grub2-2.02-115.59.1
    • grub2-debuginfo-2.02-115.59.1
    • grub2-debugsource-2.02-115.59.1
    • grub2-i386-pc-2.02-115.59.1
    • grub2-x86_64-efi-2.02-115.59.1
    • grub2-x86_64-xen-2.02-115.59.1

References: