The TOCTOU vulnerability allow that the physical present person to replace the code with the normal BootGuard check and PCR0 value.
The issue occur when BootGuard measure IBB and access flash code after NEM disable.
the reason why we access the flash code is that we have some pointer to flash.
To avoid this vulnerability, we need to convert those pointers, the patch series do this work and make sure that no code will access flash address.

v2:
Create gEdkiiMigratedFvInfoGuid HOB and add PcdMigrateTemporaryRamFirmwareVolumes to control whole feature.

v3:
Remove changes which is not related with the feature and disable the feature in virtual platform.

v4:
Disable the feature as default, Copy the Tcg2Pei behavior to TcgPei

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Dandan Bi <dandan.bi@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Debkumar De <debkumar.de@intel.com>
Cc: Harry Han <harry.han@intel.com>
Cc: Catharine West <catharine.west@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Andrew Fish <afish@apple.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Anthony Perard <anthony.perard@citrix.com>
Cc: Julien Grall <julien@xen.org>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Chao Zhang <chao.b.zhang@intel.com>
Cc: Qi Zhang <qi1.zhang@intel.com>

Guomin Jiang (6):
  MdeModulePkg: Add new PCD to control the evacuate temporary memory
    feature (CVE-2019-11098)
  MdeModulePkg/Core: Create Migrated FV Info Hob for calculating hash
    (CVE-2019-11098)
  SecurityPkg/Tcg2Pei: Use Migrated FV Info Hob for calculating hash
    (CVE-2019-11098)
  UefiCpuPkg/CpuMpPei: Enable paging and set NP flag to avoid TOCTOU
    (CVE-2019-11098)
  UefiCpuPkg: Correct some typos.
  SecurityPkg/TcgPei: Use Migrated FV Info Hob for calculating hash
    (CVE-2019-11098)

Michael Kubacki (3):
  MdeModulePkg/PeiCore: Enable T-RAM evacuation in PeiCore
    (CVE-2019-11098)
  UefiCpuPkg/CpuMpPei: Add GDT and IDT migration support
    (CVE-2019-11098)
  UefiCpuPkg/SecMigrationPei: Add initial PEIM (CVE-2019-11098)

 MdeModulePkg/MdeModulePkg.dec                 |  10 +
 UefiCpuPkg/UefiCpuPkg.dec                     |   4 +
 UefiCpuPkg/UefiCpuPkg.dsc                     |   1 +
 MdeModulePkg/Core/Pei/PeiMain.inf             |   3 +
 SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.inf           |   1 +
 SecurityPkg/Tcg/TcgPei/TcgPei.inf             |   1 +
 UefiCpuPkg/CpuMpPei/CpuMpPei.inf              |   4 +
 UefiCpuPkg/SecCore/SecCore.inf                |   2 +
 .../SecMigrationPei/SecMigrationPei.inf       |  67 +++
 MdeModulePkg/Core/Pei/PeiMain.h               | 169 +++++++
 MdeModulePkg/Include/Guid/MigratedFvInfo.h    |  22 +
 UefiCpuPkg/CpuMpPei/CpuMpPei.h                |  12 +
 UefiCpuPkg/Include/Ppi/RepublishSecPpi.h      |  54 +++
 UefiCpuPkg/SecCore/SecMain.h                  |   1 +
 UefiCpuPkg/SecMigrationPei/SecMigrationPei.h  | 154 +++++++
 MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c | 430 ++++++++++++++++++
 MdeModulePkg/Core/Pei/Image/Image.c           | 115 +++++
 MdeModulePkg/Core/Pei/Memory/MemoryServices.c |  82 ++++
 MdeModulePkg/Core/Pei/PeiMain/PeiMain.c       |  22 +
 MdeModulePkg/Core/Pei/Ppi/Ppi.c               | 287 ++++++++++++
 SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.c             |  31 +-
 SecurityPkg/Tcg/TcgPei/TcgPei.c               |  29 +-
 UefiCpuPkg/CpuMpPei/CpuMpPei.c                |  37 ++
 UefiCpuPkg/CpuMpPei/CpuPaging.c               |  42 +-
 .../Ia32/ArchExceptionHandler.c               |   4 +-
 .../SecPeiCpuException.c                      |   2 +-
 UefiCpuPkg/SecCore/SecMain.c                  |  26 +-
 UefiCpuPkg/SecMigrationPei/SecMigrationPei.c  | 378 +++++++++++++++
 MdeModulePkg/MdeModulePkg.uni                 |   6 +
 .../SecMigrationPei/SecMigrationPei.uni       |  13 +
 30 files changed, 1993 insertions(+), 16 deletions(-)
 create mode 100644 UefiCpuPkg/SecMigrationPei/SecMigrationPei.inf
 create mode 100644 MdeModulePkg/Include/Guid/MigratedFvInfo.h
 create mode 100644 UefiCpuPkg/Include/Ppi/RepublishSecPpi.h
 create mode 100644 UefiCpuPkg/SecMigrationPei/SecMigrationPei.h
 create mode 100644 UefiCpuPkg/SecMigrationPei/SecMigrationPei.c
 create mode 100644 UefiCpuPkg/SecMigrationPei/SecMigrationPei.uni

-- 
2.25.1.windows.1


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