SUSE-SU-2021:14659-1: important: Security update for grub2

[sle-security-updates at lists.suse.com]

   SUSE Security Update: Security update for grub2
______________________________________________________________________________

Announcement ID:    SUSE-SU-2021:14659-1
Rating:             important
References:         #1175970 #1176711 #1177883 #1179264 #1179265 
                    #1182057 #1182262 #1182263 
Cross-References:   CVE-2017-9763 CVE-2020-14372 CVE-2020-25632
                    CVE-2020-25647 CVE-2020-27749 CVE-2020-27779
                    CVE-2021-20225 CVE-2021-20233
CVSS scores:
                    CVE-2017-9763 (NVD) : 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
                    CVE-2017-9763 (SUSE): 4.1 CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/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 (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 (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 (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 (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 (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 (SUSE): 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected Products:
                    SUSE Linux Enterprise Server 11-SP4-LTSS
                    SUSE Linux Enterprise Debuginfo 11-SP4
______________________________________________________________________________

   An update that fixes 8 vulnerabilities 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)

   grub2 was updated to the 2.02 version (same as SUSE Linux Enterprise 12
   SP3).

   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)


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 Linux Enterprise Server 11-SP4-LTSS:

      zypper in -t patch slessp4-grub2-14659=1

   - SUSE Linux Enterprise Debuginfo 11-SP4:

      zypper in -t patch dbgsp4-grub2-14659=1



Package List:

   - SUSE Linux Enterprise Server 11-SP4-LTSS (x86_64):

      grub2-x86_64-efi-2.02-0.66.26.1
      grub2-x86_64-xen-2.02-0.66.26.1

   - SUSE Linux Enterprise Debuginfo 11-SP4 (x86_64):

      grub2-debuginfo-2.02-0.66.26.1
      grub2-debugsource-2.02-0.66.26.1


References:

   https://www.suse.com/security/cve/CVE-2017-9763.html
   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