QID 239494

The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments.The fwupd packages provide a service that allows session software to update device firmware.The following packages have been upgraded to a later upstream version: shim (15.4). (BZ#1932411)

Security Fix(es): grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled (CVE-2020-14372) grub2: Use-after-free in rmmod command (CVE-2020-25632) grub2: Out-of-bounds write in grub_usb_device_initialize()
(CVE-2020-25647) grub2: Stack buffer overflow in grub_parser_split_cmdline()
(CVE-2020-27749) grub2: cutmem command allows privileged user to remove memory regions when Secure Boot is enabled (CVE-2020-27779) grub2: Heap out-of-bounds write in short form option parser (CVE-2021-20225) grub2: Heap out-of-bounds write due to miscalculation of space required for quoting (CVE-2021-20233)

Affected Products:

Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.2 x86_64
Red Hat Enterprise Linux Server - AUS 8.2 x86_64
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.2 s390x
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.2 ppc64le
Red Hat Enterprise Linux Server - TUS 8.2 x86_64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.2 aarch64
Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 8.2 ppc64le
Red Hat Enterprise Linux Server - Update Services for SAP Solutions 8.2 x86_64
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.2 x86_64
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.2 aarch64

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

On successful exploitation, it could allow an attacker to execute code.