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| author | Guomin Jiang <guomin.jiang@intel.com> | 2020-06-29 14:50:21 +0800 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2020-07-28 01:43:16 +0000 |
| commit | 012809cdca4b876e675cbd181fee213133858a5e (patch) | |
| tree | e2ef7add66353f3c5d19518c57d24e2af7fde62e /SecurityPkg/Tcg/Tcg2Pei | |
| parent | 4b68cef04c70d8fd8a9bf745fc649c84d67531e8 (diff) | |
| download | edk2-012809cdca4b876e675cbd181fee213133858a5e.tar.gz edk2-012809cdca4b876e675cbd181fee213133858a5e.tar.bz2 edk2-012809cdca4b876e675cbd181fee213133858a5e.zip | |
SecurityPkg/Tcg2Pei: Use Migrated FV Info Hob for calculating hash (CVE-2019-11098)
REF:https://bugzilla.tianocore.org/show_bug.cgi?id=1614
When we allocate pool to save rebased the PEIMs, the address will change
randomly, therefore the hash will change and result PCR0 change as well.
To avoid this, we save the raw PEIMs and use it to calculate hash.
The Tcg2Pei calculate the hash and it use the Migrated FV Info.
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Chao Zhang <chao.b.zhang@intel.com>
Cc: Qi Zhang <qi1.zhang@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Signed-off-by: Guomin Jiang <guomin.jiang@intel.com>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>
Reviewed-by: Qi Zhang <qi1.zhang@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Diffstat (limited to 'SecurityPkg/Tcg/Tcg2Pei')
| -rw-r--r-- | SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.c | 31 | ||||
| -rw-r--r-- | SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.inf | 1 |
2 files changed, 29 insertions, 3 deletions
diff --git a/SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.c b/SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.c index 71695df3d8..246968bb7f 100644 --- a/SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.c +++ b/SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.c @@ -22,6 +22,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent #include <Guid/TcgEventHob.h>
#include <Guid/MeasuredFvHob.h>
#include <Guid/TpmInstance.h>
+#include <Guid/MigratedFvInfo.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
@@ -593,6 +594,10 @@ MeasureFvImage ( EDKII_PEI_FIRMWARE_VOLUME_INFO_PREHASHED_FV_PPI *PrehashedFvPpi;
HASH_INFO *PreHashInfo;
UINT32 HashAlgoMask;
+ EFI_PHYSICAL_ADDRESS FvOrgBase;
+ EFI_PHYSICAL_ADDRESS FvDataBase;
+ EFI_PEI_HOB_POINTERS Hob;
+ EDKII_MIGRATED_FV_INFO *MigratedFvInfo;
//
// Check Excluded FV list
@@ -679,6 +684,26 @@ MeasureFvImage ( } while (!EFI_ERROR(Status));
//
+ // Search the matched migration FV info
+ //
+ FvOrgBase = FvBase;
+ FvDataBase = FvBase;
+ Hob.Raw = GetFirstGuidHob (&gEdkiiMigratedFvInfoGuid);
+ while (Hob.Raw != NULL) {
+ MigratedFvInfo = GET_GUID_HOB_DATA (Hob);
+ if ((MigratedFvInfo->FvNewBase == (UINT32) FvBase) && (MigratedFvInfo->FvLength == (UINT32) FvLength)) {
+ //
+ // Found the migrated FV info
+ //
+ FvOrgBase = (EFI_PHYSICAL_ADDRESS) (UINTN) MigratedFvInfo->FvOrgBase;
+ FvDataBase = (EFI_PHYSICAL_ADDRESS) (UINTN) MigratedFvInfo->FvDataBase;
+ break;
+ }
+ Hob.Raw = GET_NEXT_HOB (Hob);
+ Hob.Raw = GetNextGuidHob (&gEdkiiMigratedFvInfoGuid, Hob.Raw);
+ }
+
+ //
// Init the log event for FV measurement
//
if (PcdGet32(PcdTcgPfpMeasurementRevision) >= TCG_EfiSpecIDEventStruct_SPEC_ERRATA_TPM2_REV_105) {
@@ -688,14 +713,14 @@ MeasureFvImage ( if (FvName != NULL) {
AsciiSPrint ((CHAR8 *)FvBlob2.BlobDescription, sizeof(FvBlob2.BlobDescription), "Fv(%g)", FvName);
}
- FvBlob2.BlobBase = FvBase;
+ FvBlob2.BlobBase = FvOrgBase;
FvBlob2.BlobLength = FvLength;
TcgEventHdr.PCRIndex = 0;
TcgEventHdr.EventType = EV_EFI_PLATFORM_FIRMWARE_BLOB2;
TcgEventHdr.EventSize = sizeof (FvBlob2);
EventData = &FvBlob2;
} else {
- FvBlob.BlobBase = FvBase;
+ FvBlob.BlobBase = FvOrgBase;
FvBlob.BlobLength = FvLength;
TcgEventHdr.PCRIndex = 0;
TcgEventHdr.EventType = EV_EFI_PLATFORM_FIRMWARE_BLOB;
@@ -725,7 +750,7 @@ MeasureFvImage ( Status = HashLogExtendEvent (
&mEdkiiTcgPpi,
0,
- (UINT8*) (UINTN) FvBase, // HashData
+ (UINT8*) (UINTN) FvDataBase, // HashData
(UINTN) FvLength, // HashDataLen
&TcgEventHdr, // EventHdr
EventData // EventData
diff --git a/SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.inf b/SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.inf index f64b29f1ae..06c26a2904 100644 --- a/SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.inf +++ b/SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.inf @@ -63,6 +63,7 @@ gTcgEvent2EntryHobGuid ## PRODUCES ## HOB
gEfiTpmDeviceInstanceNoneGuid ## SOMETIMES_PRODUCES ## GUID # TPM device identifier
gEfiTpmDeviceInstanceTpm12Guid ## SOMETIMES_PRODUCES ## GUID # TPM device identifier
+ gEdkiiMigratedFvInfoGuid ## SOMETIMES_CONSUMES ## HOB
[Ppis]
gEfiPeiFirmwareVolumeInfoPpiGuid ## SOMETIMES_CONSUMES ## NOTIFY
|