Security update for grub2 (important)

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