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SUSE-SU-2023:2086-1

Опубликовано: 02 мая 2023
Источник: suse-cvrf

Описание

Security update for shim

This update for shim fixes the following issues:

  • Updated shim signature after shim 15.7 be signed back: signature-sles.x86_64.asc, signature-sles.aarch64.asc (bsc#1198458)

  • Add POST_PROCESS_PE_FLAGS=-N to the build command in shim.spec to disable the NX compatibility flag when using post-process-pe because grub2 is not ready. (bsc#1205588)

  • Enable the NX compatibility flag by default. (jsc#PED-127)

Update to 15.7 (bsc#1198458) (jsc#PED-127):

  • Make SBAT variable payload introspectable
  • Reference MokListRT instead of MokList
  • Add a link to the test plan in the readme.
  • [V3] Enable TDX measurement to RTMR register
  • Discard load-options that start with a NUL
  • Fixed load_cert_file bugs
  • Add -malign-double to IA32 compiler flags
  • pe: Fix image section entry-point validation
  • make-archive: Build reproducible tarball
  • mok: remove MokListTrusted from PCR 7

Other fixes:

  • Support enhance shim measurement to TD RTMR. (jsc#PED-1273)

  • shim-install: ensure grub.cfg created is not overwritten after installing grub related files

  • Add logic to shim.spec to only set sbat policy when efivarfs is writeable. (bsc#1201066)

  • Add logic to shim.spec for detecting --set-sbat-policy option before using mokutil to set sbat policy. (bsc#1202120)

  • Change the URL in SBAT section to mail:security@suse.de. (bsc#1193282)

Update to 15.6 (bsc#1198458):

  • MokManager: removed Locate graphic output protocol fail error message
  • shim: implement SBAT verification for the shim_lock protocol
  • post-process-pe: Fix a missing return code check
  • Update github actions matrix to be more useful
  • post-process-pe: Fix format string warnings on 32-bit platforms
  • Allow MokListTrusted to be enabled by default
  • Re-add ARM AArch64 support
  • Use ASCII as fallback if Unicode Box Drawing characters fail
  • make: don't treat cert.S specially
  • shim: use SHIM_DEVEL_VERBOSE when built in devel mode
  • Break out of the inner sbat loop if we find the entry.
  • Support loading additional certificates
  • Add support for NX (W^X) mitigations.
  • Fix preserve_sbat_uefi_variable() logic
  • SBAT Policy latest should be a one-shot
  • pe: Fix a buffer overflow when SizeOfRawData > VirtualSize
  • pe: Perform image verification earlier when loading grub
  • Update advertised sbat generation number for shim
  • Update SBAT generation requirements for 05/24/22
  • Also avoid CVE-2022-28737 in verify_image() by @vathpela

Update to 15.5 (bsc#1198458):

  • Broken ia32 relocs and an unimportant submodule change.

  • mok: allocate MOK config table as BootServicesData

  • Don't call QueryVariableInfo() on EFI 1.10 machines (bsc#1187260)

  • Relax the check for import_mok_state() (bsc#1185261)

  • SBAT.md: trivial changes

  • shim: another attempt to fix load options handling

  • Add tests for our load options parsing.

  • arm/aa64: fix the size of .rela* sections

  • mok: fix potential buffer overrun in import_mok_state

  • mok: relax the maximum variable size check

  • Don't unhook ExitBootServices when EBS protection is disabled

  • fallback: find_boot_option() needs to return the index for the boot entry in optnum

  • httpboot: Ignore case when checking HTTP headers

  • Fallback allocation errors

  • shim: avoid BOOTx64.EFI in message on other architectures

  • str: remove duplicate parameter check

  • fallback: add compile option FALLBACK_NONINTERACTIVE

  • Test mok mirror

  • Modify sbat.md to help with readability.

  • csv: detect end of csv file correctly

  • Specify that the .sbat section is ASCII not UTF-8

  • tests: add 'include-fixed' GCC directory to include directories

  • pe: simplify generate_hash()

  • Don't make shim abort when TPM log event fails (RHBZ #2002265)

  • Fallback to default loader if parsed one does not exist

  • fallback: Fix for BootOrder crash when index returned

  • Better console checks

  • docs: update SBAT UEFI variable name

  • Don't parse load options if invoked from removable media path

  • fallback: fix fallback not passing arguments of the first boot option

  • shim: Don't stop forever at 'Secure Boot not enabled' notification

  • Allocate mokvar table in runtime memory.

  • Remove post-process-pe on 'make clean'

  • pe: missing perror argument

  • CVE-2022-28737: Fixed a buffer overflow when SizeOfRawData > VirtualSize (bsc#1198458)

  • Add mokutil command to post script for setting sbat policy to latest mode when the SbatPolicy-605dab50-e046-4300-abb6-3dd810dd8b23 is not created. (bsc#1198458)

  • Updated vendor dbx binary and script (bsc#1198458)

    • Updated dbx-cert.tar.xz and vendor-dbx-sles.bin for adding SLES-UEFI-SIGN-Certificate-2021-05.crt to vendor dbx list.
    • Updated dbx-cert.tar.xz and vendor-dbx-opensuse.bin for adding openSUSE-UEFI-SIGN-Certificate-2021-05.crt to vendor dbx list.
    • Updated vendor-dbx.bin for adding SLES-UEFI-SIGN-Certificate-2021-05.crt and openSUSE-UEFI-SIGN-Certificate-2021-05.crt for testing environment.
    • Updated generate-vendor-dbx.sh script for generating a vendor-dbx.bin file which includes all .der for testing environment.
  • avoid buffer overflow when copying data to the MOK config table (bsc#1185232)

  • Disable exporting vendor-dbx to MokListXRT since writing a large RT variable could crash some machines (bsc#1185261)

  • ignore the odd LoadOptions length (bsc#1185232)

  • shim-install: reset def_shim_efi to 'shim.efi' if the given file doesn't exist

  • relax the maximum variable size check for u-boot (bsc#1185621)

  • handle ignore_db and user_insecure_mode correctly (bsc#1185441, bsc#1187071)

  • Split the keys in vendor-dbx.bin to vendor-dbx-sles and vendor-dbx-opensuse for shim-sles and shim-opensuse to reduce the size of MokListXRT (bsc#1185261)

    • Also update generate-vendor-dbx.sh in dbx-cert.tar.xz

Список пакетов

Image SLES15-SP1-SAP-Azure-LI-BYOS-Production
shim-15.7-150100.3.35.1
Image SLES15-SP1-SAP-Azure-VLI-BYOS-Production
shim-15.7-150100.3.35.1
Image SLES15-SP2-BYOS-Azure
shim-15.7-150100.3.35.1
Image SLES15-SP2-HPC-BYOS-Azure
shim-15.7-150100.3.35.1
Image SLES15-SP2-SAP-Azure
shim-15.7-150100.3.35.1
Image SLES15-SP2-SAP-Azure-LI-BYOS-Production
shim-15.7-150100.3.35.1
Image SLES15-SP2-SAP-Azure-VLI-BYOS-Production
shim-15.7-150100.3.35.1
Image SLES15-SP2-SAP-BYOS-Azure
shim-15.7-150100.3.35.1
Image SLES15-SP2-SAP-BYOS-EC2-HVM
shim-15.7-150100.3.35.1
Image SLES15-SP2-SAP-BYOS-GCE
shim-15.7-150100.3.35.1
Image SLES15-SP2-SAP-EC2-HVM
shim-15.7-150100.3.35.1
Image SLES15-SP2-SAP-GCE
shim-15.7-150100.3.35.1
SUSE Enterprise Storage 7
shim-15.7-150100.3.35.1
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS
shim-15.7-150100.3.35.1
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS
shim-15.7-150100.3.35.1
SUSE Linux Enterprise Server 15 SP1-LTSS
shim-15.7-150100.3.35.1
SUSE Linux Enterprise Server 15 SP2-LTSS
shim-15.7-150100.3.35.1
SUSE Linux Enterprise Server for SAP Applications 15 SP1
shim-15.7-150100.3.35.1
SUSE Linux Enterprise Server for SAP Applications 15 SP2
shim-15.7-150100.3.35.1

Описание

There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables; The handle_image() function takes into account the SizeOfRawData field from each section to be loaded. An attacker can leverage this to perform out-of-bound writes into memory. Arbitrary code execution is not discarded in such scenario.


Затронутые продукты
Image SLES15-SP1-SAP-Azure-LI-BYOS-Production:shim-15.7-150100.3.35.1
Image SLES15-SP1-SAP-Azure-VLI-BYOS-Production:shim-15.7-150100.3.35.1
Image SLES15-SP2-BYOS-Azure:shim-15.7-150100.3.35.1
Image SLES15-SP2-HPC-BYOS-Azure:shim-15.7-150100.3.35.1

Ссылки
Уязвимость SUSE-SU-2023:2086-1