VeraCrypt
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authorMounir IDRASSI <mounir.idrassi@idrix.fr>2014-08-31 22:03:26 (GMT)
committerMounir IDRASSI <mounir.idrassi@idrix.fr>2014-11-08 22:23:10 (GMT)
commit7c501359b3c6c5c09a60abc6f3831254e592afb1 (patch)
treeb03a3299439f50ea9be731c0541c32e2667ed07f
parentf82e16f0a1b2be294b8fcd7e45f8b0d940e53e82 (diff)
downloadVeraCrypt-7c501359b3c6c5c09a60abc6f3831254e592afb1.zip
VeraCrypt-7c501359b3c6c5c09a60abc6f3831254e592afb1.tar.gz
Windows vulnerability fix: correct some integer overflow issues using the IntSafe library. Detected by the Open Crypto Audit project
-rw-r--r--src/Driver/EncryptedIoQueue.c31
-rw-r--r--src/Driver/Ntdriver.c15
2 files changed, 40 insertions, 6 deletions
diff --git a/src/Driver/EncryptedIoQueue.c b/src/Driver/EncryptedIoQueue.c
index bb76a0f..7c9441e 100644
--- a/src/Driver/EncryptedIoQueue.c
+++ b/src/Driver/EncryptedIoQueue.c
@@ -13,6 +13,7 @@
#include "EncryptedIoQueue.h"
#include "EncryptionThreadPool.h"
#include "Volumes.h"
+#include <IntSafe.h>
static void AcquireBufferPoolMutex (EncryptedIoQueue *queue)
@@ -492,6 +493,8 @@ static VOID MainThreadProc (PVOID threadArg)
EncryptedIoRequest *request;
uint64 intersectStart;
uint32 intersectLength;
+ ULONGLONG addResult;
+ HRESULT hResult;
if (IsEncryptionThreadPoolRunning())
KeSetPriorityThread (KeGetCurrentThread(), LOW_REALTIME_PRIORITY);
@@ -561,8 +564,15 @@ static VOID MainThreadProc (PVOID threadArg)
&& (item->OriginalOffset.QuadPart & (ENCRYPTION_DATA_UNIT_SIZE - 1)) != 0)
{
byte *buffer;
- ULONG alignedLength = item->OriginalLength + ENCRYPTION_DATA_UNIT_SIZE;
+ ULONG alignedLength;
LARGE_INTEGER alignedOffset;
+ hResult = ULongAdd(item->OriginalLength, ENCRYPTION_DATA_UNIT_SIZE, &alignedLength);
+ if (hResult != S_OK)
+ {
+ CompleteOriginalIrp (item, STATUS_INVALID_PARAMETER, 0);
+ continue;
+ }
+
alignedOffset.QuadPart = item->OriginalOffset.QuadPart & ~((LONGLONG) ENCRYPTION_DATA_UNIT_SIZE - 1);
buffer = TCalloc (alignedLength);
@@ -608,7 +618,12 @@ static VOID MainThreadProc (PVOID threadArg)
if (item->OriginalLength == 0
|| (item->OriginalLength & (ENCRYPTION_DATA_UNIT_SIZE - 1)) != 0
|| (item->OriginalOffset.QuadPart & (ENCRYPTION_DATA_UNIT_SIZE - 1)) != 0
- || (!queue->IsFilterDevice && item->OriginalOffset.QuadPart + item->OriginalLength > queue->VirtualDeviceLength))
+ || ( !queue->IsFilterDevice &&
+ ( (S_OK != ULongLongAdd(item->OriginalOffset.QuadPart, item->OriginalLength, &addResult))
+ || (addResult > (ULONGLONG) queue->VirtualDeviceLength)
+ )
+ )
+ )
{
CompleteOriginalIrp (item, STATUS_INVALID_PARAMETER, 0);
continue;
@@ -622,9 +637,17 @@ static VOID MainThreadProc (PVOID threadArg)
{
// Adjust the offset for host file or device
if (queue->CryptoInfo->hiddenVolume)
- item->OriginalOffset.QuadPart += queue->CryptoInfo->hiddenVolumeOffset;
+ hResult = ULongLongAdd(item->OriginalOffset.QuadPart, queue->CryptoInfo->hiddenVolumeOffset, &addResult);
+ else
+ hResult = ULongLongAdd(item->OriginalOffset.QuadPart, queue->CryptoInfo->volDataAreaOffset, &addResult);
+
+ if (hResult != S_OK)
+ {
+ CompleteOriginalIrp (item, STATUS_INVALID_PARAMETER, 0);
+ continue;
+ }
else
- item->OriginalOffset.QuadPart += queue->CryptoInfo->volDataAreaOffset;
+ item->OriginalOffset.QuadPart = addResult;
// Hidden volume protection
if (item->Write && queue->CryptoInfo->bProtectHiddenVolume)
diff --git a/src/Driver/Ntdriver.c b/src/Driver/Ntdriver.c
index 72f35c6..556badb 100644
--- a/src/Driver/Ntdriver.c
+++ b/src/Driver/Ntdriver.c
@@ -34,6 +34,7 @@
#include <ntddvol.h>
#include <Ntstrsafe.h>
+#include <Intsafe.h>
/* Init section, which is thrown away as soon as DriverEntry returns */
#pragma alloc_text(INIT,DriverEntry)
@@ -704,10 +705,20 @@ NTSTATUS ProcessVolumeDeviceControlIrp (PDEVICE_OBJECT DeviceObject, PEXTENSION
case IOCTL_DISK_VERIFY:
if (ValidateIOBufferSize (Irp, sizeof (VERIFY_INFORMATION), ValidateInput))
{
+ HRESULT hResult;
+ ULONGLONG ullStartingOffset, ullNewOffset, ullEndOffset;
PVERIFY_INFORMATION pVerifyInformation;
pVerifyInformation = (PVERIFY_INFORMATION) Irp->AssociatedIrp.SystemBuffer;
- if (pVerifyInformation->StartingOffset.QuadPart + pVerifyInformation->Length > Extension->DiskLength)
+ ullStartingOffset = (ULONGLONG) pVerifyInformation->StartingOffset.QuadPart;
+ hResult = ULongLongAdd(ullStartingOffset,
+ (ULONGLONG) Extension->cryptoInfo->hiddenVolume ? Extension->cryptoInfo->hiddenVolumeOffset : Extension->cryptoInfo->volDataAreaOffset,
+ &ullNewOffset);
+ if (hResult != S_OK)
+ Irp->IoStatus.Status = STATUS_INVALID_PARAMETER;
+ else if (S_OK != ULongLongAdd(ullNewOffset, (ULONGLONG) pVerifyInformation->Length, &ullEndOffset))
+ Irp->IoStatus.Status = STATUS_INVALID_PARAMETER;
+ else if (ullEndOffset > (ULONGLONG) Extension->DiskLength)
Irp->IoStatus.Status = STATUS_INVALID_PARAMETER;
else
{
@@ -721,7 +732,7 @@ NTSTATUS ProcessVolumeDeviceControlIrp (PDEVICE_OBJECT DeviceObject, PEXTENSION
else
{
LARGE_INTEGER offset = pVerifyInformation->StartingOffset;
- offset.QuadPart += Extension->cryptoInfo->hiddenVolume ? Extension->cryptoInfo->hiddenVolumeOffset : Extension->cryptoInfo->volDataAreaOffset;
+ offset.QuadPart = ullNewOffset;
Irp->IoStatus.Status = ZwReadFile (Extension->hDeviceFile, NULL, NULL, NULL, &ioStatus, buffer, pVerifyInformation->Length, &offset, NULL);
TCfree (buffer);