A grub2 security update has been released for openSUSE Leap 15.2.

openSUSE-SU-2021:0462-1: important: Security update for grub2

openSUSE Security Update: Security update for grub2
______________________________________________________________________________

Announcement ID: openSUSE-SU-2021:0462-1
Rating: important
References: #1175970 #1176711 #1177883 #1179264 #1179265
#1182057 #1182262 #1182263 #1183073
Cross-References: CVE-2020-14372 CVE-2020-25632 CVE-2020-25647
CVE-2020-27749 CVE-2020-27779 CVE-2021-20225
CVE-2021-20233
CVSS scores:
CVE-2020-14372 (NVD) : 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CVE-2020-14372 (SUSE): 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CVE-2020-25632 (NVD) : 8.2 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVE-2020-25632 (SUSE): 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CVE-2020-25647 (NVD) : 7.6 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVE-2020-25647 (SUSE): 7.6 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVE-2020-27749 (NVD) : 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVE-2020-27749 (SUSE): 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CVE-2020-27779 (NVD) : 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CVE-2020-27779 (SUSE): 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CVE-2021-20225 (NVD) : 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVE-2021-20225 (SUSE): 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CVE-2021-20233 (NVD) : 8.2 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVE-2021-20233 (SUSE): 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected Products:
openSUSE Leap 15.2
______________________________________________________________________________

An update that solves 7 vulnerabilities and has two fixes
is now available.

Description:

This update for grub2 fixes the following issues:

grub2 implements the new "SBAT" method for SHIM based secure boot
revocation. (bsc#1182057)

- 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)

- Fixed chainloading windows on dual boot machine (bsc#1183073)

This update was imported from the SUSE:SLE-15-SP2:Update update project.

Patch Instructions:

To install this openSUSE 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:

- openSUSE Leap 15.2:

zypper in -t patch openSUSE-2021-462=1


Package List:

- openSUSE Leap 15.2 (i586 x86_64):

grub2-2.04-lp152.7.22.7
grub2-branding-upstream-2.04-lp152.7.22.7
grub2-debuginfo-2.04-lp152.7.22.7
grub2-debugsource-2.04-lp152.7.22.7

- openSUSE Leap 15.2 (noarch):

grub2-i386-efi-2.04-lp152.7.22.7
grub2-i386-efi-debug-2.04-lp152.7.22.7
grub2-i386-pc-2.04-lp152.7.22.7
grub2-i386-pc-debug-2.04-lp152.7.22.7
grub2-i386-xen-2.04-lp152.7.22.7
grub2-snapper-plugin-2.04-lp152.7.22.7
grub2-systemd-sleep-plugin-2.04-lp152.7.22.7
grub2-x86_64-efi-2.04-lp152.7.22.7
grub2-x86_64-efi-debug-2.04-lp152.7.22.7
grub2-x86_64-xen-2.04-lp152.7.22.7

References:

  https://www.suse.com/security/cve/CVE-2020-14372.html
  https://www.suse.com/security/cve/CVE-2020-25632.html
  https://www.suse.com/security/cve/CVE-2020-25647.html
  https://www.suse.com/security/cve/CVE-2020-27749.html
  https://www.suse.com/security/cve/CVE-2020-27779.html
  https://www.suse.com/security/cve/CVE-2021-20225.html
  https://www.suse.com/security/cve/CVE-2021-20233.html
  https://bugzilla.suse.com/1175970
  https://bugzilla.suse.com/1176711
  https://bugzilla.suse.com/1177883
  https://bugzilla.suse.com/1179264
  https://bugzilla.suse.com/1179265
  https://bugzilla.suse.com/1182057
  https://bugzilla.suse.com/1182262
  https://bugzilla.suse.com/1182263
  https://bugzilla.suse.com/1183073