SUSE-SU-2021:14659-1

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SUSE-SU-2021:14659-1

Summary: Security update for grub2

Details: 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)

References: https://www.suse.com/support/update/announcement/2021/suse-su-202114659-1/, 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://www.suse.com/security/cve/CVE-2017-9763, https://www.suse.com/security/cve/CVE-2020-14372, https://www.suse.com/security/cve/CVE-2020-25632, https://www.suse.com/security/cve/CVE-2020-25647, https://www.suse.com/security/cve/CVE-2020-27749, https://www.suse.com/security/cve/CVE-2020-27779, https://www.suse.com/security/cve/CVE-2021-20225, https://www.suse.com/security/cve/CVE-2021-20233