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# Security update for shim

Announcement ID: SUSE-SU-2023:1863-1  
Rating: important  
References:

  * bsc#1185232
  * bsc#1185261
  * bsc#1185441
  * bsc#1185621
  * bsc#1187071
  * bsc#1187260
  * bsc#1193282
  * bsc#1193315
  * bsc#1198458
  * bsc#1201066
  * bsc#1202120
  * bsc#1205588
  * jsc#PED-127
  * jsc#PED-1273

  
Cross-References:

  * CVE-2022-28737

  
CVSS scores:

  * CVE-2022-28737 ( SUSE ):  8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2022-28737 ( NVD ):  6.5 CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H

  
Affected Products:

  * SUSE Linux Enterprise High Performance Computing 12 SP4
  * SUSE Linux Enterprise High Performance Computing 12 SP5
  * SUSE Linux Enterprise Server 12 SP4
  * SUSE Linux Enterprise Server 12 SP4 ESPOS 12-SP4
  * SUSE Linux Enterprise Server 12 SP4 LTSS 12-SP4
  * SUSE Linux Enterprise Server 12 SP5
  * SUSE Linux Enterprise Server for SAP Applications 12 SP4
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5
  * SUSE OpenStack Cloud 9
  * SUSE OpenStack Cloud Crowbar 9

  
  
An update that solves one vulnerability, contains two features and has 11
security fixes can now be installed.

## Description:

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

## Patch Instructions:

To install this SUSE 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 OpenStack Cloud 9  
    zypper in -t patch SUSE-OpenStack-Cloud-9-2023-1863=1

  * SUSE OpenStack Cloud Crowbar 9  
    zypper in -t patch SUSE-OpenStack-Cloud-Crowbar-9-2023-1863=1

  * SUSE Linux Enterprise Server for SAP Applications 12 SP4  
    zypper in -t patch SUSE-SLE-SAP-12-SP4-2023-1863=1

  * SUSE Linux Enterprise Server 12 SP4 ESPOS 12-SP4  
    zypper in -t patch SUSE-SLE-SERVER-12-SP4-ESPOS-2023-1863=1

  * SUSE Linux Enterprise Server 12 SP4 LTSS 12-SP4  
    zypper in -t patch SUSE-SLE-SERVER-12-SP4-LTSS-2023-1863=1

  * SUSE Linux Enterprise Server for SAP Applications 12 SP5  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-2023-1863=1

  * SUSE Linux Enterprise High Performance Computing 12 SP5  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-2023-1863=1

  * SUSE Linux Enterprise Server 12 SP5  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-2023-1863=1

## Package List:

  * SUSE OpenStack Cloud 9 (x86_64)
    * shim-15.7-25.24.1
  * SUSE OpenStack Cloud Crowbar 9 (x86_64)
    * shim-15.7-25.24.1
  * SUSE Linux Enterprise Server for SAP Applications 12 SP4 (x86_64)
    * shim-15.7-25.24.1
  * SUSE Linux Enterprise Server 12 SP4 ESPOS 12-SP4 (x86_64)
    * shim-15.7-25.24.1
  * SUSE Linux Enterprise Server 12 SP4 LTSS 12-SP4 (x86_64)
    * shim-15.7-25.24.1
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5 (x86_64)
    * shim-15.7-25.24.1
  * SUSE Linux Enterprise High Performance Computing 12 SP5 (x86_64)
    * shim-15.7-25.24.1
  * SUSE Linux Enterprise Server 12 SP5 (x86_64)
    * shim-15.7-25.24.1

## References:

  * https://www.suse.com/security/cve/CVE-2022-28737.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1185232
  * https://bugzilla.suse.com/show_bug.cgi?id=1185261
  * https://bugzilla.suse.com/show_bug.cgi?id=1185441
  * https://bugzilla.suse.com/show_bug.cgi?id=1185621
  * https://bugzilla.suse.com/show_bug.cgi?id=1187071
  * https://bugzilla.suse.com/show_bug.cgi?id=1187260
  * https://bugzilla.suse.com/show_bug.cgi?id=1193282
  * https://bugzilla.suse.com/show_bug.cgi?id=1193315
  * https://bugzilla.suse.com/show_bug.cgi?id=1198458
  * https://bugzilla.suse.com/show_bug.cgi?id=1201066
  * https://bugzilla.suse.com/show_bug.cgi?id=1202120
  * https://bugzilla.suse.com/show_bug.cgi?id=1205588
  * https://jira.suse.com/login.jsp
  * https://jira.suse.com/login.jsp3

SUSE: 2023:1863-1 important: shim

February 27, 2024
* bsc#1185232 * bsc#1185261 * bsc#1185441 * bsc#1185621 * bsc#1187071

Summary

## 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 ## Patch Instructions: To install this SUSE 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 OpenStack Cloud 9 zypper in -t patch SUSE-OpenStack-Cloud-9-2023-1863=1 * SUSE OpenStack Cloud Crowbar 9 zypper in -t patch SUSE-OpenStack-Cloud-Crowbar-9-2023-1863=1 * SUSE Linux Enterprise Server for SAP Applications 12 SP4 zypper in -t patch SUSE-SLE-SAP-12-SP4-2023-1863=1 * SUSE Linux Enterprise Server 12 SP4 ESPOS 12-SP4 zypper in -t patch SUSE-SLE-SERVER-12-SP4-ESPOS-2023-1863=1 * SUSE Linux Enterprise Server 12 SP4 LTSS 12-SP4 zypper in -t patch SUSE-SLE-SERVER-12-SP4-LTSS-2023-1863=1 * SUSE Linux Enterprise Server for SAP Applications 12 SP5 zypper in -t patch SUSE-SLE-SERVER-12-SP5-2023-1863=1 * SUSE Linux Enterprise High Performance Computing 12 SP5 zypper in -t patch SUSE-SLE-SERVER-12-SP5-2023-1863=1 * SUSE Linux Enterprise Server 12 SP5 zypper in -t patch SUSE-SLE-SERVER-12-SP5-2023-1863=1 ## Package List: * SUSE OpenStack Cloud 9 (x86_64) * shim-15.7-25.24.1 * SUSE OpenStack Cloud Crowbar 9 (x86_64) * shim-15.7-25.24.1 * SUSE Linux Enterprise Server for SAP Applications 12 SP4 (x86_64) * shim-15.7-25.24.1 * SUSE Linux Enterprise Server 12 SP4 ESPOS 12-SP4 (x86_64) * shim-15.7-25.24.1 * SUSE Linux Enterprise Server 12 SP4 LTSS 12-SP4 (x86_64) * shim-15.7-25.24.1 * SUSE Linux Enterprise Server for SAP Applications 12 SP5 (x86_64) * shim-15.7-25.24.1 * SUSE Linux Enterprise High Performance Computing 12 SP5 (x86_64) * shim-15.7-25.24.1 * SUSE Linux Enterprise Server 12 SP5 (x86_64) * shim-15.7-25.24.1

References

* bsc#1185232

* bsc#1185261

* bsc#1185441

* bsc#1185621

* bsc#1187071

* bsc#1187260

* bsc#1193282

* bsc#1193315

* bsc#1198458

* bsc#1201066

* bsc#1202120

* bsc#1205588

* jsc#PED-127

* jsc#PED-1273

Cross-

* CVE-2022-28737

CVSS scores:

* CVE-2022-28737 ( SUSE ): 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

* CVE-2022-28737 ( NVD ): 6.5 CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H

Affected Products:

* SUSE Linux Enterprise High Performance Computing 12 SP4

* SUSE Linux Enterprise High Performance Computing 12 SP5

* SUSE Linux Enterprise Server 12 SP4

* SUSE Linux Enterprise Server 12 SP4 ESPOS 12-SP4

* SUSE Linux Enterprise Server 12 SP4 LTSS 12-SP4

* SUSE Linux Enterprise Server 12 SP5

* SUSE Linux Enterprise Server for SAP Applications 12 SP4

* SUSE Linux Enterprise Server for SAP Applications 12 SP5

* SUSE OpenStack Cloud 9

* SUSE OpenStack Cloud Crowbar 9

An update that solves one vulnerability, contains two features and has 11

security fixes can now be installed.

##

* https://www.suse.com/security/cve/CVE-2022-28737.html

* https://bugzilla.suse.com/show_bug.cgi?id=1185232

* https://bugzilla.suse.com/show_bug.cgi?id=1185261

* https://bugzilla.suse.com/show_bug.cgi?id=1185441

* https://bugzilla.suse.com/show_bug.cgi?id=1185621

* https://bugzilla.suse.com/show_bug.cgi?id=1187071

* https://bugzilla.suse.com/show_bug.cgi?id=1187260

* https://bugzilla.suse.com/show_bug.cgi?id=1193282

* https://bugzilla.suse.com/show_bug.cgi?id=1193315

* https://bugzilla.suse.com/show_bug.cgi?id=1198458

* https://bugzilla.suse.com/show_bug.cgi?id=1201066

* https://bugzilla.suse.com/show_bug.cgi?id=1202120

* https://bugzilla.suse.com/show_bug.cgi?id=1205588

* https://jira.suse.com/login.jsp

* https://jira.suse.com/login.jsp3

Severity
Announcement ID: SUSE-SU-2023:1863-1
Rating: important

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