diff options
| author | Douglas Flick [MSFT] <doug.edk2@gmail.com> | 2024-01-12 02:16:02 +0800 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2024-01-16 07:56:38 +0000 |
| commit | 4776a1b39ee08fc45c70c1eab5a0195f325000d3 (patch) | |
| tree | a87b9acef3bb1404786ac2e8e9461be323e81b98 /SecurityPkg | |
| parent | 224446543206450ddb5830e6abd026d61d3c7f4b (diff) | |
| download | edk2-4776a1b39ee08fc45c70c1eab5a0195f325000d3.tar.gz edk2-4776a1b39ee08fc45c70c1eab5a0195f325000d3.tar.bz2 edk2-4776a1b39ee08fc45c70c1eab5a0195f325000d3.zip | |
SecurityPkg: DxeTpmMeasureBootLib: SECURITY PATCH 4117 - CVE 2022-36763
This commit contains the patch files and tests for DxeTpmMeasureBootLib
CVE 2022-36763.
Cc: Jiewen Yao <jiewen.yao@intel.com>
Signed-off-by: Doug Flick [MSFT] <doug.edk2@gmail.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Diffstat (limited to 'SecurityPkg')
8 files changed, 716 insertions, 14 deletions
diff --git a/SecurityPkg/Library/DxeTpmMeasureBootLib/DxeTpmMeasureBootLib.c b/SecurityPkg/Library/DxeTpmMeasureBootLib/DxeTpmMeasureBootLib.c index 220393dd2b..669ab19134 100644 --- a/SecurityPkg/Library/DxeTpmMeasureBootLib/DxeTpmMeasureBootLib.c +++ b/SecurityPkg/Library/DxeTpmMeasureBootLib/DxeTpmMeasureBootLib.c @@ -18,6 +18,8 @@ Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
+Copyright (c) Microsoft Corporation.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiDxe.h>
@@ -40,6 +42,8 @@ SPDX-License-Identifier: BSD-2-Clause-Patent #include <Library/SecurityManagementLib.h>
#include <Library/HobLib.h>
+#include "DxeTpmMeasureBootLibSanitization.h"
+
//
// Flag to check GPT partition. It only need be measured once.
//
@@ -136,6 +140,9 @@ TcgMeasureGptTable ( UINT32 EventSize;
UINT32 EventNumber;
EFI_PHYSICAL_ADDRESS EventLogLastEntry;
+ UINT32 AllocSize;
+
+ GptData = NULL;
if (mMeasureGptCount > 0) {
return EFI_SUCCESS;
@@ -166,8 +173,8 @@ TcgMeasureGptTable ( BlockIo->Media->BlockSize,
(UINT8 *)PrimaryHeader
);
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_ERROR, "Failed to Read Partition Table Header!\n"));
+ if (EFI_ERROR (Status) || EFI_ERROR (SanitizeEfiPartitionTableHeader (PrimaryHeader, BlockIo))) {
+ DEBUG ((DEBUG_ERROR, "Failed to read Partition Table Header or invalid Partition Table Header!\n"));
FreePool (PrimaryHeader);
return EFI_DEVICE_ERROR;
}
@@ -175,7 +182,13 @@ TcgMeasureGptTable ( //
// Read the partition entry.
//
- EntryPtr = (UINT8 *)AllocatePool (PrimaryHeader->NumberOfPartitionEntries * PrimaryHeader->SizeOfPartitionEntry);
+ Status = SanitizePrimaryHeaderAllocationSize (PrimaryHeader, &AllocSize);
+ if (EFI_ERROR (Status)) {
+ FreePool (PrimaryHeader);
+ return EFI_DEVICE_ERROR;
+ }
+
+ EntryPtr = (UINT8 *)AllocatePool (AllocSize);
if (EntryPtr == NULL) {
FreePool (PrimaryHeader);
return EFI_OUT_OF_RESOURCES;
@@ -185,7 +198,7 @@ TcgMeasureGptTable ( DiskIo,
BlockIo->Media->MediaId,
MultU64x32 (PrimaryHeader->PartitionEntryLBA, BlockIo->Media->BlockSize),
- PrimaryHeader->NumberOfPartitionEntries * PrimaryHeader->SizeOfPartitionEntry,
+ AllocSize,
EntryPtr
);
if (EFI_ERROR (Status)) {
@@ -210,9 +223,8 @@ TcgMeasureGptTable ( //
// Prepare Data for Measurement
//
- EventSize = (UINT32)(sizeof (EFI_GPT_DATA) - sizeof (GptData->Partitions)
- + NumberOfPartition * PrimaryHeader->SizeOfPartitionEntry);
- TcgEvent = (TCG_PCR_EVENT *)AllocateZeroPool (EventSize + sizeof (TCG_PCR_EVENT_HDR));
+ Status = SanitizePrimaryHeaderGptEventSize (PrimaryHeader, NumberOfPartition, &EventSize);
+ TcgEvent = (TCG_PCR_EVENT *)AllocateZeroPool (EventSize);
if (TcgEvent == NULL) {
FreePool (PrimaryHeader);
FreePool (EntryPtr);
@@ -221,7 +233,7 @@ TcgMeasureGptTable ( TcgEvent->PCRIndex = 5;
TcgEvent->EventType = EV_EFI_GPT_EVENT;
- TcgEvent->EventSize = EventSize;
+ TcgEvent->EventSize = EventSize - sizeof (TCG_PCR_EVENT_HDR);
GptData = (EFI_GPT_DATA *)TcgEvent->Event;
//
@@ -361,11 +373,13 @@ TcgMeasurePeImage ( TcgEvent->PCRIndex = 2;
break;
default:
- DEBUG ((
- DEBUG_ERROR,
- "TcgMeasurePeImage: Unknown subsystem type %d",
- ImageType
- ));
+ DEBUG (
+ (
+ DEBUG_ERROR,
+ "TcgMeasurePeImage: Unknown subsystem type %d",
+ ImageType
+ )
+ );
goto Finish;
}
diff --git a/SecurityPkg/Library/DxeTpmMeasureBootLib/DxeTpmMeasureBootLib.inf b/SecurityPkg/Library/DxeTpmMeasureBootLib/DxeTpmMeasureBootLib.inf index ebab6f7c1e..414c654d15 100644 --- a/SecurityPkg/Library/DxeTpmMeasureBootLib/DxeTpmMeasureBootLib.inf +++ b/SecurityPkg/Library/DxeTpmMeasureBootLib/DxeTpmMeasureBootLib.inf @@ -32,6 +32,8 @@ [Sources]
DxeTpmMeasureBootLib.c
+ DxeTpmMeasureBootLibSanitization.c
+ DxeTpmMeasureBootLibSanitization.h
[Packages]
MdePkg/MdePkg.dec
@@ -41,6 +43,7 @@ [LibraryClasses]
BaseMemoryLib
+ SafeIntLib
DebugLib
MemoryAllocationLib
DevicePathLib
@@ -59,4 +62,3 @@ gEfiFirmwareVolumeBlockProtocolGuid ## SOMETIMES_CONSUMES
gEfiBlockIoProtocolGuid ## SOMETIMES_CONSUMES
gEfiDiskIoProtocolGuid ## SOMETIMES_CONSUMES
-
diff --git a/SecurityPkg/Library/DxeTpmMeasureBootLib/DxeTpmMeasureBootLibSanitization.c b/SecurityPkg/Library/DxeTpmMeasureBootLib/DxeTpmMeasureBootLibSanitization.c new file mode 100644 index 0000000000..a3fa46f5e6 --- /dev/null +++ b/SecurityPkg/Library/DxeTpmMeasureBootLib/DxeTpmMeasureBootLibSanitization.c @@ -0,0 +1,241 @@ +/** @file
+ The library instance provides security service of TPM2 measure boot and
+ Confidential Computing (CC) measure boot.
+
+ Caution: This file requires additional review when modified.
+ This library will have external input - PE/COFF image and GPT partition.
+ This external input must be validated carefully to avoid security issue like
+ buffer overflow, integer overflow.
+
+ This file will pull out the validation logic from the following functions, in an
+ attempt to validate the untrusted input in the form of unit tests
+
+ These are those functions:
+
+ DxeTpmMeasureBootLibImageRead() function will make sure the PE/COFF image content
+ read is within the image buffer.
+
+ Tcg2MeasureGptTable() function will receive untrusted GPT partition table, and parse
+ partition data carefully.
+
+ Copyright (c) Microsoft Corporation.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+#include <Uefi.h>
+#include <Uefi/UefiSpec.h>
+#include <Library/SafeIntLib.h>
+#include <Library/UefiLib.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseLib.h>
+#include <IndustryStandard/UefiTcgPlatform.h>
+#include <Protocol/BlockIo.h>
+#include <Library/MemoryAllocationLib.h>
+
+#include "DxeTpmMeasureBootLibSanitization.h"
+
+#define GPT_HEADER_REVISION_V1 0x00010000
+
+/**
+ This function will validate the EFI_PARTITION_TABLE_HEADER structure is safe to parse
+ However this function will not attempt to verify the validity of the GPT partition
+ It will check the following:
+ - Signature
+ - Revision
+ - AlternateLBA
+ - FirstUsableLBA
+ - LastUsableLBA
+ - PartitionEntryLBA
+ - NumberOfPartitionEntries
+ - SizeOfPartitionEntry
+ - BlockIo
+
+ @param[in] PrimaryHeader
+ Pointer to the EFI_PARTITION_TABLE_HEADER structure.
+
+ @param[in] BlockIo
+ Pointer to the EFI_BLOCK_IO_PROTOCOL structure.
+
+ @retval EFI_SUCCESS
+ The EFI_PARTITION_TABLE_HEADER structure is valid.
+
+ @retval EFI_INVALID_PARAMETER
+ The EFI_PARTITION_TABLE_HEADER structure is invalid.
+**/
+EFI_STATUS
+EFIAPI
+SanitizeEfiPartitionTableHeader (
+ IN CONST EFI_PARTITION_TABLE_HEADER *PrimaryHeader,
+ IN CONST EFI_BLOCK_IO_PROTOCOL *BlockIo
+ )
+{
+ // Verify that the input parameters are safe to use
+ if (PrimaryHeader == NULL) {
+ DEBUG ((DEBUG_ERROR, "Invalid Partition Table Header!\n"));
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if ((BlockIo == NULL) || (BlockIo->Media == NULL)) {
+ DEBUG ((DEBUG_ERROR, "Invalid BlockIo!\n"));
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // The signature must be EFI_PTAB_HEADER_ID ("EFI PART" in ASCII)
+ if (PrimaryHeader->Header.Signature != EFI_PTAB_HEADER_ID) {
+ DEBUG ((DEBUG_ERROR, "Invalid Partition Table Header!\n"));
+ return EFI_DEVICE_ERROR;
+ }
+
+ // The version must be GPT_HEADER_REVISION_V1 (0x00010000)
+ if (PrimaryHeader->Header.Revision != GPT_HEADER_REVISION_V1) {
+ DEBUG ((DEBUG_ERROR, "Invalid Partition Table Header Revision!\n"));
+ return EFI_DEVICE_ERROR;
+ }
+
+ // The HeaderSize must be greater than or equal to 92 and must be less than or equal to the logical block size
+ if ((PrimaryHeader->Header.HeaderSize < sizeof (EFI_PARTITION_TABLE_HEADER)) || (PrimaryHeader->Header.HeaderSize > BlockIo->Media->BlockSize)) {
+ DEBUG ((DEBUG_ERROR, "Invalid Partition Table Header HeaderSize!\n"));
+ return EFI_DEVICE_ERROR;
+ }
+
+ // check that the PartitionEntryLBA greater than the Max LBA
+ // This will be used later for multiplication
+ if (PrimaryHeader->PartitionEntryLBA > DivU64x32 (MAX_UINT64, BlockIo->Media->BlockSize)) {
+ DEBUG ((DEBUG_ERROR, "Invalid Partition Table Header PartitionEntryLBA!\n"));
+ return EFI_DEVICE_ERROR;
+ }
+
+ // Check that the number of partition entries is greater than zero
+ if (PrimaryHeader->NumberOfPartitionEntries == 0) {
+ DEBUG ((DEBUG_ERROR, "Invalid Partition Table Header NumberOfPartitionEntries!\n"));
+ return EFI_DEVICE_ERROR;
+ }
+
+ // SizeOfPartitionEntry must be 128, 256, 512... improper size may lead to accessing uninitialized memory
+ if ((PrimaryHeader->SizeOfPartitionEntry < 128) || ((PrimaryHeader->SizeOfPartitionEntry & (PrimaryHeader->SizeOfPartitionEntry - 1)) != 0)) {
+ DEBUG ((DEBUG_ERROR, "SizeOfPartitionEntry shall be set to a value of 128 x 2^n where n is an integer greater than or equal to zero (e.g., 128, 256, 512, etc.)!\n"));
+ return EFI_DEVICE_ERROR;
+ }
+
+ // This check is to prevent overflow when calculating the allocation size for the partition entries
+ // This check will be used later for multiplication
+ if (PrimaryHeader->NumberOfPartitionEntries > DivU64x32 (MAX_UINT64, PrimaryHeader->SizeOfPartitionEntry)) {
+ DEBUG ((DEBUG_ERROR, "Invalid Partition Table Header NumberOfPartitionEntries!\n"));
+ return EFI_DEVICE_ERROR;
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ This function will validate that the allocation size from the primary header is sane
+ It will check the following:
+ - AllocationSize does not overflow
+
+ @param[in] PrimaryHeader
+ Pointer to the EFI_PARTITION_TABLE_HEADER structure.
+
+ @param[out] AllocationSize
+ Pointer to the allocation size.
+
+ @retval EFI_SUCCESS
+ The allocation size is valid.
+
+ @retval EFI_OUT_OF_RESOURCES
+ The allocation size is invalid.
+**/
+EFI_STATUS
+EFIAPI
+SanitizePrimaryHeaderAllocationSize (
+ IN CONST EFI_PARTITION_TABLE_HEADER *PrimaryHeader,
+ OUT UINT32 *AllocationSize
+ )
+{
+ EFI_STATUS Status;
+
+ if (PrimaryHeader == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (AllocationSize == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // Replacing logic:
+ // PrimaryHeader->NumberOfPartitionEntries * PrimaryHeader->SizeOfPartitionEntry;
+ Status = SafeUint32Mult (PrimaryHeader->NumberOfPartitionEntries, PrimaryHeader->SizeOfPartitionEntry, AllocationSize);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "Allocation Size would have overflowed!\n"));
+ return EFI_BAD_BUFFER_SIZE;
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ This function will validate that the Gpt Event Size calculated from the primary header is sane
+ It will check the following:
+ - EventSize does not overflow
+
+ Important: This function includes the entire length of the allocated space, including the
+ TCG_PCR_EVENT_HDR. When hashing the buffer allocated with this size, the caller must subtract
+ the size of the TCG_PCR_EVENT_HDR from the size of the buffer before hashing.
+
+ @param[in] PrimaryHeader - Pointer to the EFI_PARTITION_TABLE_HEADER structure.
+ @param[in] NumberOfPartition - Number of partitions.
+ @param[out] EventSize - Pointer to the event size.
+
+ @retval EFI_SUCCESS
+ The event size is valid.
+
+ @retval EFI_OUT_OF_RESOURCES
+ Overflow would have occurred.
+
+ @retval EFI_INVALID_PARAMETER
+ One of the passed parameters was invalid.
+**/
+EFI_STATUS
+SanitizePrimaryHeaderGptEventSize (
+ IN CONST EFI_PARTITION_TABLE_HEADER *PrimaryHeader,
+ IN UINTN NumberOfPartition,
+ OUT UINT32 *EventSize
+ )
+{
+ EFI_STATUS Status;
+ UINT32 SafeNumberOfPartitions;
+
+ if (PrimaryHeader == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (EventSize == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // We shouldn't even attempt to perform the multiplication if the number of partitions is greater than the maximum value of UINT32
+ Status = SafeUintnToUint32 (NumberOfPartition, &SafeNumberOfPartitions);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "NumberOfPartition would have overflowed!\n"));
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // Replacing logic:
+ // (UINT32)(sizeof (EFI_GPT_DATA) - sizeof (GptData->Partitions) + NumberOfPartition * PrimaryHeader.SizeOfPartitionEntry + sizeof (TCG_PCR_EVENT_HDR));
+ Status = SafeUint32Mult (SafeNumberOfPartitions, PrimaryHeader->SizeOfPartitionEntry, EventSize);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "Event Size would have overflowed!\n"));
+ return EFI_BAD_BUFFER_SIZE;
+ }
+
+ Status = SafeUint32Add (
+ sizeof (TCG_PCR_EVENT_HDR) +
+ OFFSET_OF (EFI_GPT_DATA, Partitions),
+ *EventSize,
+ EventSize
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "Event Size would have overflowed because of GPTData!\n"));
+ return EFI_BAD_BUFFER_SIZE;
+ }
+
+ return EFI_SUCCESS;
+}
diff --git a/SecurityPkg/Library/DxeTpmMeasureBootLib/DxeTpmMeasureBootLibSanitization.h b/SecurityPkg/Library/DxeTpmMeasureBootLib/DxeTpmMeasureBootLibSanitization.h new file mode 100644 index 0000000000..0d9d00c281 --- /dev/null +++ b/SecurityPkg/Library/DxeTpmMeasureBootLib/DxeTpmMeasureBootLibSanitization.h @@ -0,0 +1,114 @@ +/** @file
+ This file includes the function prototypes for the sanitization functions.
+
+ These are those functions:
+
+ DxeTpmMeasureBootLibImageRead() function will make sure the PE/COFF image content
+ read is within the image buffer.
+
+ TcgMeasurePeImage() function will accept untrusted PE/COFF image and validate its
+ data structure within this image buffer before use.
+
+ TcgMeasureGptTable() function will receive untrusted GPT partition table, and parse
+ partition data carefully.
+
+ Copyright (c) Microsoft Corporation.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef DXE_TPM_MEASURE_BOOT_LIB_VALIDATION_
+#define DXE_TPM_MEASURE_BOOT_LIB_VALIDATION_
+
+#include <Uefi.h>
+#include <Uefi/UefiSpec.h>
+#include <Protocol/BlockIo.h>
+#include <IndustryStandard/UefiTcgPlatform.h>
+
+/**
+ This function will validate the EFI_PARTITION_TABLE_HEADER structure is safe to parse
+ However this function will not attempt to verify the validity of the GPT partition
+ It will check the following:
+ - Signature
+ - Revision
+ - AlternateLBA
+ - FirstUsableLBA
+ - LastUsableLBA
+ - PartitionEntryLBA
+ - NumberOfPartitionEntries
+ - SizeOfPartitionEntry
+ - BlockIo
+
+ @param[in] PrimaryHeader
+ Pointer to the EFI_PARTITION_TABLE_HEADER structure.
+
+ @param[in] BlockIo
+ Pointer to the EFI_BLOCK_IO_PROTOCOL structure.
+
+ @retval EFI_SUCCESS
+ The EFI_PARTITION_TABLE_HEADER structure is valid.
+
+ @retval EFI_INVALID_PARAMETER
+ The EFI_PARTITION_TABLE_HEADER structure is invalid.
+**/
+EFI_STATUS
+EFIAPI
+SanitizeEfiPartitionTableHeader (
+ IN CONST EFI_PARTITION_TABLE_HEADER *PrimaryHeader,
+ IN CONST EFI_BLOCK_IO_PROTOCOL *BlockIo
+ );
+
+/**
+ This function will validate that the allocation size from the primary header is sane
+ It will check the following:
+ - AllocationSize does not overflow
+
+ @param[in] PrimaryHeader
+ Pointer to the EFI_PARTITION_TABLE_HEADER structure.
+
+ @param[out] AllocationSize
+ Pointer to the allocation size.
+
+ @retval EFI_SUCCESS
+ The allocation size is valid.
+
+ @retval EFI_OUT_OF_RESOURCES
+ The allocation size is invalid.
+**/
+EFI_STATUS
+EFIAPI
+SanitizePrimaryHeaderAllocationSize (
+ IN CONST EFI_PARTITION_TABLE_HEADER *PrimaryHeader,
+ OUT UINT32 *AllocationSize
+ );
+
+/**
+ This function will validate that the Gpt Event Size calculated from the primary header is sane
+ It will check the following:
+ - EventSize does not overflow
+
+ Important: This function includes the entire length of the allocated space, including the
+ TCG_PCR_EVENT_HDR. When hashing the buffer allocated with this size, the caller must subtract
+ the size of the TCG_PCR_EVENT_HDR from the size of the buffer before hashing.
+
+ @param[in] PrimaryHeader - Pointer to the EFI_PARTITION_TABLE_HEADER structure.
+ @param[in] NumberOfPartition - Number of partitions.
+ @param[out] EventSize - Pointer to the event size.
+
+ @retval EFI_SUCCESS
+ The event size is valid.
+
+ @retval EFI_OUT_OF_RESOURCES
+ Overflow would have occurred.
+
+ @retval EFI_INVALID_PARAMETER
+ One of the passed parameters was invalid.
+**/
+EFI_STATUS
+SanitizePrimaryHeaderGptEventSize (
+ IN CONST EFI_PARTITION_TABLE_HEADER *PrimaryHeader,
+ IN UINTN NumberOfPartition,
+ OUT UINT32 *EventSize
+ );
+
+#endif // DXE_TPM_MEASURE_BOOT_LIB_VALIDATION_
diff --git a/SecurityPkg/Library/DxeTpmMeasureBootLib/InternalUnitTest/DxeTpmMeasureBootLibSanitizationTest.c b/SecurityPkg/Library/DxeTpmMeasureBootLib/InternalUnitTest/DxeTpmMeasureBootLibSanitizationTest.c new file mode 100644 index 0000000000..eeb928cdb0 --- /dev/null +++ b/SecurityPkg/Library/DxeTpmMeasureBootLib/InternalUnitTest/DxeTpmMeasureBootLibSanitizationTest.c @@ -0,0 +1,301 @@ +/** @file
+This file includes the unit test cases for the DxeTpmMeasureBootLibSanitizationTest.c.
+
+Copyright (c) Microsoft Corporation.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Uefi.h>
+#include <Library/UefiLib.h>
+#include <Library/DebugLib.h>
+#include <Library/UnitTestLib.h>
+#include <Protocol/BlockIo.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <IndustryStandard/UefiTcgPlatform.h>
+
+#include "../DxeTpmMeasureBootLibSanitization.h"
+
+#define UNIT_TEST_NAME "DxeTpmMeasureBootLibSanitizationTest"
+#define UNIT_TEST_VERSION "1.0"
+
+#define DEFAULT_PRIMARY_TABLE_HEADER_REVISION 0x00010000
+#define DEFAULT_PRIMARY_TABLE_HEADER_NUMBER_OF_PARTITION_ENTRIES 1
+#define DEFAULT_PRIMARY_TABLE_HEADER_SIZE_OF_PARTITION_ENTRY 128
+
+/**
+ This function tests the SanitizeEfiPartitionTableHeader function.
+ It's intent is to test that a malicious EFI_PARTITION_TABLE_HEADER
+ structure will not cause undefined or unexpected behavior.
+
+ In general the TPM should still be able to measure the data, but
+ be the header should be sanitized to prevent any unexpected behavior.
+
+ @param[in] Context The unit test context.
+
+ @retval UNIT_TEST_PASSED The test passed.
+ @retval UNIT_TEST_ERROR_TEST_FAILED The test failed.
+**/
+UNIT_TEST_STATUS
+EFIAPI
+TestSanitizeEfiPartitionTableHeader (
+ IN UNIT_TEST_CONTEXT Context
+ )
+{
+ EFI_STATUS Status;
+ EFI_PARTITION_TABLE_HEADER PrimaryHeader;
+ EFI_BLOCK_IO_PROTOCOL BlockIo;
+ EFI_BLOCK_IO_MEDIA BlockMedia;
+
+ // Generate EFI_BLOCK_IO_MEDIA test data
+ BlockMedia.MediaId = 1;
+ BlockMedia.RemovableMedia = FALSE;
+ BlockMedia.MediaPresent = TRUE;
+ BlockMedia.LogicalPartition = FALSE;
+ BlockMedia.ReadOnly = FALSE;
+ BlockMedia.WriteCaching = FALSE;
+ BlockMedia.BlockSize = 512;
+ BlockMedia.IoAlign = 1;
+ BlockMedia.LastBlock = 0;
+
+ // Generate EFI_BLOCK_IO_PROTOCOL test data
+ BlockIo.Revision = 1;
+ BlockIo.Media = &BlockMedia;
+ BlockIo.Reset = NULL;
+ BlockIo.ReadBlocks = NULL;
+ BlockIo.WriteBlocks = NULL;
+ BlockIo.FlushBlocks = NULL;
+
+ // Geneate EFI_PARTITION_TABLE_HEADER test data
+ PrimaryHeader.Header.Signature = EFI_PTAB_HEADER_ID;
+ PrimaryHeader.Header.Revision = DEFAULT_PRIMARY_TABLE_HEADER_REVISION;
+ PrimaryHeader.Header.HeaderSize = sizeof (EFI_PARTITION_TABLE_HEADER);
+ PrimaryHeader.MyLBA = 1;
+ PrimaryHeader.AlternateLBA = 2;
+ PrimaryHeader.FirstUsableLBA = 3;
+ PrimaryHeader.LastUsableLBA = 4;
+ PrimaryHeader.PartitionEntryLBA = 5;
+ PrimaryHeader.NumberOfPartitionEntries = DEFAULT_PRIMARY_TABLE_HEADER_NUMBER_OF_PARTITION_ENTRIES;
+ PrimaryHeader.SizeOfPartitionEntry = DEFAULT_PRIMARY_TABLE_HEADER_SIZE_OF_PARTITION_ENTRY;
+ PrimaryHeader.PartitionEntryArrayCRC32 = 0; // Purposely invalid
+
+ // Calculate the CRC32 of the PrimaryHeader
+ PrimaryHeader.Header.CRC32 = CalculateCrc32 ((UINT8 *)&PrimaryHeader, PrimaryHeader.Header.HeaderSize);
+
+ // Test that a normal PrimaryHeader passes validation
+ Status = SanitizeEfiPartitionTableHeader (&PrimaryHeader, &BlockIo);
+ UT_ASSERT_NOT_EFI_ERROR (Status);
+
+ // Test that when number of partition entries is 0, the function returns EFI_DEVICE_ERROR
+ // Should print "Invalid Partition Table Header NumberOfPartitionEntries!""
+ PrimaryHeader.NumberOfPartitionEntries = 0;
+ Status = SanitizeEfiPartitionTableHeader (&PrimaryHeader, &BlockIo);
+ UT_ASSERT_EQUAL (Status, EFI_DEVICE_ERROR);
+ PrimaryHeader.NumberOfPartitionEntries = DEFAULT_PRIMARY_TABLE_HEADER_SIZE_OF_PARTITION_ENTRY;
+
+ // Test that when the header size is too small, the function returns EFI_DEVICE_ERROR
+ // Should print "Invalid Partition Table Header Size!"
+ PrimaryHeader.Header.HeaderSize = 0;
+ Status = SanitizeEfiPartitionTableHeader (&PrimaryHeader, &BlockIo);
+ UT_ASSERT_EQUAL (Status, EFI_DEVICE_ERROR);
+ PrimaryHeader.Header.HeaderSize = sizeof (EFI_PARTITION_TABLE_HEADER);
+
+ // Test that when the SizeOfPartitionEntry is too small, the function returns EFI_DEVICE_ERROR
+ // should print: "SizeOfPartitionEntry shall be set to a value of 128 x 2^n where n is an integer greater than or equal to zero (e.g., 128, 256, 512, etc.)!"
+ PrimaryHeader.SizeOfPartitionEntry = 1;
+ Status = SanitizeEfiPartitionTableHeader (&PrimaryHeader, &BlockIo);
+ UT_ASSERT_EQUAL (Status, EFI_DEVICE_ERROR);
+
+ DEBUG ((DEBUG_INFO, "%a: Test passed\n", __func__));
+
+ return UNIT_TEST_PASSED;
+}
+
+/**
+ This function tests the SanitizePrimaryHeaderAllocationSize function.
+ It's intent is to test that the untrusted input from a EFI_PARTITION_TABLE_HEADER
+ structure will not cause an overflow when calculating the allocation size.
+
+ @param[in] Context The unit test context.
+
+ @retval UNIT_TEST_PASSED The test passed.
+ @retval UNIT_TEST_ERROR_TEST_FAILED The test failed.
+**/
+UNIT_TEST_STATUS
+EFIAPI
+TestSanitizePrimaryHeaderAllocationSize (
+ IN UNIT_TEST_CONTEXT Context
+ )
+{
+ UINT32 AllocationSize;
+
+ EFI_STATUS Status;
+ EFI_PARTITION_TABLE_HEADER PrimaryHeader;
+
+ // Test that a normal PrimaryHeader passes validation
+ PrimaryHeader.NumberOfPartitionEntries = 5;
+ PrimaryHeader.SizeOfPartitionEntry = DEFAULT_PRIMARY_TABLE_HEADER_SIZE_OF_PARTITION_ENTRY;
+
+ Status = SanitizePrimaryHeaderAllocationSize (&PrimaryHeader, &AllocationSize);
+ UT_ASSERT_NOT_EFI_ERROR (Status);
+
+ // Test that the allocation size is correct compared to the existing logic
+ UT_ASSERT_EQUAL (AllocationSize, PrimaryHeader.NumberOfPartitionEntries * PrimaryHeader.SizeOfPartitionEntry);
+
+ // Test that an overflow is detected
+ PrimaryHeader.NumberOfPartitionEntries = MAX_UINT32;
+ PrimaryHeader.SizeOfPartitionEntry = 5;
+ Status = SanitizePrimaryHeaderAllocationSize (&PrimaryHeader, &AllocationSize);
+ UT_ASSERT_EQUAL (Status, EFI_BAD_BUFFER_SIZE);
+
+ // Test the inverse
+ PrimaryHeader.NumberOfPartitionEntries = 5;
+ PrimaryHeader.SizeOfPartitionEntry = MAX_UINT32;
+ Status = SanitizePrimaryHeaderAllocationSize (&PrimaryHeader, &AllocationSize);
+ UT_ASSERT_EQUAL (Status, EFI_BAD_BUFFER_SIZE);
+
+ // Test the worst case scenario
+ PrimaryHeader.NumberOfPartitionEntries = MAX_UINT32;
+ PrimaryHeader.SizeOfPartitionEntry = MAX_UINT32;
+ Status = SanitizePrimaryHeaderAllocationSize (&PrimaryHeader, &AllocationSize);
+ UT_ASSERT_EQUAL (Status, EFI_BAD_BUFFER_SIZE);
+
+ DEBUG ((DEBUG_INFO, "%a: Test passed\n", __func__));
+
+ return UNIT_TEST_PASSED;
+}
+
+/**
+ This function tests the SanitizePrimaryHeaderGptEventSize function.
+ It's intent is to test that the untrusted input from a EFI_GPT_DATA structure
+ will not cause an overflow when calculating the event size.
+
+ @param[in] Context The unit test context.
+
+ @retval UNIT_TEST_PASSED The test passed.
+ @retval UNIT_TEST_ERROR_TEST_FAILED The test failed.
+**/
+UNIT_TEST_STATUS
+EFIAPI
+TestSanitizePrimaryHeaderGptEventSize (
+ IN UNIT_TEST_CONTEXT Context
+ )
+{
+ UINT32 EventSize;
+ UINT32 ExistingLogicEventSize;
+ EFI_STATUS Status;
+ EFI_PARTITION_TABLE_HEADER PrimaryHeader;
+ UINTN NumberOfPartition;
+ EFI_GPT_DATA *GptData;
+
+ GptData = NULL;
+
+ // Test that a normal PrimaryHeader passes validation
+ PrimaryHeader.NumberOfPartitionEntries = 5;
+ PrimaryHeader.SizeOfPartitionEntry = DEFAULT_PRIMARY_TABLE_HEADER_SIZE_OF_PARTITION_ENTRY;
+
+ // set the number of partitions
+ NumberOfPartition = 13;
+
+ // that the primary event size is correct
+ Status = SanitizePrimaryHeaderGptEventSize (&PrimaryHeader, NumberOfPartition, &EventSize);
+ UT_ASSERT_NOT_EFI_ERROR (Status);
+
+ // Calculate the existing logic event size
+ ExistingLogicEventSize = (UINT32)(sizeof (TCG_PCR_EVENT_HDR) + OFFSET_OF (EFI_GPT_DATA, Partitions)
+ + NumberOfPartition * PrimaryHeader.SizeOfPartitionEntry);
+
+ // Check that the event size is correct
+ UT_ASSERT_EQUAL (EventSize, ExistingLogicEventSize);
+
+ // Tests that the primary event size may not overflow
+ Status = SanitizePrimaryHeaderGptEventSize (&PrimaryHeader, MAX_UINT32, &EventSize);
+ UT_ASSERT_EQUAL (Status, EFI_BAD_BUFFER_SIZE);
+
+ // Test that the size of partition entries may not overflow
+ PrimaryHeader.SizeOfPartitionEntry = MAX_UINT32;
+ Status = SanitizePrimaryHeaderGptEventSize (&PrimaryHeader, NumberOfPartition, &EventSize);
+ UT_ASSERT_EQUAL (Status, EFI_BAD_BUFFER_SIZE);
+
+ DEBUG ((DEBUG_INFO, "%a: Test passed\n", __func__));
+
+ return UNIT_TEST_PASSED;
+}
+
+// *--------------------------------------------------------------------*
+// * Unit Test Code Main Function
+// *--------------------------------------------------------------------*
+
+/**
+ This function acts as the entry point for the unit tests.
+
+ @param argc - The number of command line arguments
+ @param argv - The command line arguments
+
+ @return int - The status of the test
+**/
+EFI_STATUS
+EFIAPI
+UefiTestMain (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+ UNIT_TEST_FRAMEWORK_HANDLE Framework;
+ UNIT_TEST_SUITE_HANDLE TcgMeasureBootLibValidationTestSuite;
+
+ Framework = NULL;
+
+ DEBUG ((DEBUG_INFO, "%a: TestMain() - Start\n", UNIT_TEST_NAME));
+
+ Status = InitUnitTestFramework (&Framework, UNIT_TEST_NAME, gEfiCallerBaseName, UNIT_TEST_VERSION);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "%a: Failed in InitUnitTestFramework. Status = %r\n", UNIT_TEST_NAME, Status));
+ goto EXIT;
+ }
+
+ Status = CreateUnitTestSuite (&TcgMeasureBootLibValidationTestSuite, Framework, "TcgMeasureBootLibValidationTestSuite", "Common.TcgMeasureBootLibValidation", NULL, NULL);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "%s: Failed in CreateUnitTestSuite for TcgMeasureBootLibValidationTestSuite\n", UNIT_TEST_NAME));
+ Status = EFI_OUT_OF_RESOURCES;
+ goto EXIT;
+ }
+
+ // -----------Suite---------------------------------Description----------------------------Class----------------------------------Test Function------------------------Pre---Clean-Context
+ AddTestCase (TcgMeasureBootLibValidationTestSuite, "Tests Validating EFI Partition Table", "Common.TcgMeasureBootLibValidation", TestSanitizeEfiPartitionTableHeader, NULL, NULL, NULL);
+ AddTestCase (TcgMeasureBootLibValidationTestSuite, "Tests Primary header gpt event checks for overflow", "Common.TcgMeasureBootLibValidation", TestSanitizePrimaryHeaderAllocationSize, NULL, NULL, NULL);
+ AddTestCase (TcgMeasureBootLibValidationTestSuite, "Tests Primary header allocation size checks for overflow", "Common.TcgMeasureBootLibValidation", TestSanitizePrimaryHeaderGptEventSize, NULL, NULL, NULL);
+
+ Status = RunAllTestSuites (Framework);
+
+EXIT:
+ if (Framework != NULL) {
+ FreeUnitTestFramework (Framework);
+ }
+
+ DEBUG ((DEBUG_INFO, "%a: TestMain() - End\n", UNIT_TEST_NAME));
+ return Status;
+}
+
+///
+/// Avoid ECC error for function name that starts with lower case letter
+///
+#define DxeTpmMeasureBootLibUnitTestMain main
+
+/**
+ Standard POSIX C entry point for host based unit test execution.
+
+ @param[in] Argc Number of arguments
+ @param[in] Argv Array of pointers to arguments
+
+ @retval 0 Success
+ @retval other Error
+**/
+INT32
+DxeTpmMeasureBootLibUnitTestMain (
+ IN INT32 Argc,
+ IN CHAR8 *Argv[]
+ )
+{
+ return (INT32)UefiTestMain ();
+}
diff --git a/SecurityPkg/Library/DxeTpmMeasureBootLib/InternalUnitTest/DxeTpmMeasureBootLibSanitizationTestHost.inf b/SecurityPkg/Library/DxeTpmMeasureBootLib/InternalUnitTest/DxeTpmMeasureBootLibSanitizationTestHost.inf new file mode 100644 index 0000000000..47b0811b00 --- /dev/null +++ b/SecurityPkg/Library/DxeTpmMeasureBootLib/InternalUnitTest/DxeTpmMeasureBootLibSanitizationTestHost.inf @@ -0,0 +1,28 @@ +## @file
+# This file builds the unit tests for DxeTpmMeasureBootLib
+#
+# Copyright (C) Microsoft Corporation.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+[Defines]
+ INF_VERSION = 0x00010006
+ BASE_NAME = DxeTpmMeasuredBootLibTest
+ FILE_GUID = eb01bc38-309c-4d3e-967e-9f078c90772f
+ MODULE_TYPE = HOST_APPLICATION
+ VERSION_STRING = 1.0
+ ENTRY_POINT = main
+
+[Sources]
+ DxeTpmMeasureBootLibSanitizationTest.c
+ ../DxeTpmMeasureBootLibSanitization.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+
+[LibraryClasses]
+ BaseLib
+ DebugLib
+ UnitTestLib
+ PrintLib
+ SafeIntLib
diff --git a/SecurityPkg/SecurityPkg.ci.yaml b/SecurityPkg/SecurityPkg.ci.yaml index 24389531af..53e5b1fd8e 100644 --- a/SecurityPkg/SecurityPkg.ci.yaml +++ b/SecurityPkg/SecurityPkg.ci.yaml @@ -17,6 +17,7 @@ "ExceptionList": [
"8005", "gRT",
"8001", "DxeTpm2MeasureBootLibUnitTestMain",
+ "8001", "DxeTpmMeasureBootLibUnitTestMain"
],
## Both file path and directory path are accepted.
"IgnoreFiles": [
diff --git a/SecurityPkg/Test/SecurityPkgHostTest.dsc b/SecurityPkg/Test/SecurityPkgHostTest.dsc index 788c1ab6fe..1655e573ea 100644 --- a/SecurityPkg/Test/SecurityPkgHostTest.dsc +++ b/SecurityPkg/Test/SecurityPkgHostTest.dsc @@ -27,6 +27,7 @@ SecurityPkg/Library/SecureBootVariableLib/UnitTest/MockUefiLib.inf
SecurityPkg/Test/Mock/Library/GoogleTest/MockPlatformPKProtectionLib/MockPlatformPKProtectionLib.inf
SecurityPkg/Library/DxeTpm2MeasureBootLib/InternalUnitTest/DxeTpm2MeasureBootLibSanitizationTestHost.inf
+ SecurityPkg/Library/DxeTpmMeasureBootLib/InternalUnitTest/DxeTpmMeasureBootLibSanitizationTestHost.inf
#
# Build SecurityPkg HOST_APPLICATION Tests
|