diff options
Diffstat (limited to 'MdePkg/Library/BasePeCoffLib')
| -rw-r--r-- | MdePkg/Library/BasePeCoffLib/BasePeCoff.c | 83 |
1 files changed, 63 insertions, 20 deletions
diff --git a/MdePkg/Library/BasePeCoffLib/BasePeCoff.c b/MdePkg/Library/BasePeCoffLib/BasePeCoff.c index f82ed76..6f056e5 100644 --- a/MdePkg/Library/BasePeCoffLib/BasePeCoff.c +++ b/MdePkg/Library/BasePeCoffLib/BasePeCoff.c @@ -87,6 +87,7 @@ PeCoffLoaderGetPeHeader ( UINT16 Magic;
UINT32 SectionHeaderOffset;
UINT32 Index;
+ UINT32 HeaderWithoutDataDir;
CHAR8 BufferData;
UINTN NumberOfSections;
EFI_IMAGE_SECTION_HEADER SectionHeader;
@@ -164,7 +165,7 @@ PeCoffLoaderGetPeHeader ( if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
//
- // 1. Check FileHeader.SizeOfOptionalHeader filed.
+ // 1. Check OptionalHeader.NumberOfRvaAndSizes filed.
//
if (EFI_IMAGE_NUMBER_OF_DIRECTORY_ENTRIES < Hdr.Pe32->OptionalHeader.NumberOfRvaAndSizes) {
ImageContext->ImageError = IMAGE_ERROR_UNSUPPORTED;
@@ -172,19 +173,36 @@ PeCoffLoaderGetPeHeader ( }
//
- // 2. Check the OptionalHeader.SizeOfHeaders field.
- // This field will be use like the following mode, so just compare the result.
- // The DataDirectory array begin with 1, not 0, so here use < to compare not <=.
+ // 2. Check the FileHeader.SizeOfOptionalHeader field.
+ // OptionalHeader.NumberOfRvaAndSizes is not bigger than 16, so
+ // OptionalHeader.NumberOfRvaAndSizes * sizeof (EFI_IMAGE_DATA_DIRECTORY) will not overflow.
//
- if (EFI_IMAGE_DIRECTORY_ENTRY_SECURITY + 1 < Hdr.Pe32->OptionalHeader.NumberOfRvaAndSizes) {
- if (Hdr.Pe32->OptionalHeader.SizeOfHeaders < (UINT32)((UINT8 *)(&Hdr.Pe32->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_SECURITY + 1]) - (UINT8 *) &Hdr)) {
- ImageContext->ImageError = IMAGE_ERROR_UNSUPPORTED;
- return RETURN_UNSUPPORTED;
- }
+ HeaderWithoutDataDir = sizeof (EFI_IMAGE_OPTIONAL_HEADER32) - sizeof (EFI_IMAGE_DATA_DIRECTORY) * EFI_IMAGE_NUMBER_OF_DIRECTORY_ENTRIES;
+ if (((UINT32)Hdr.Pe32->FileHeader.SizeOfOptionalHeader - HeaderWithoutDataDir) !=
+ Hdr.Pe32->OptionalHeader.NumberOfRvaAndSizes * sizeof (EFI_IMAGE_DATA_DIRECTORY)) {
+ ImageContext->ImageError = IMAGE_ERROR_UNSUPPORTED;
+ return RETURN_UNSUPPORTED;
}
+ SectionHeaderOffset = ImageContext->PeCoffHeaderOffset + sizeof (UINT32) + sizeof (EFI_IMAGE_FILE_HEADER) + Hdr.Pe32->FileHeader.SizeOfOptionalHeader;
//
- // 2.2 Read last byte of Hdr.Pe32.OptionalHeader.SizeOfHeaders from the file.
+ // 3. Check the FileHeader.NumberOfSections field.
+ //
+ if ((Hdr.Pe32->OptionalHeader.SizeOfImage - SectionHeaderOffset) / EFI_IMAGE_SIZEOF_SECTION_HEADER <= Hdr.Pe32->FileHeader.NumberOfSections) {
+ ImageContext->ImageError = IMAGE_ERROR_UNSUPPORTED;
+ return RETURN_UNSUPPORTED;
+ }
+
+ //
+ // 4. Check the OptionalHeader.SizeOfHeaders field.
+ //
+ if ((Hdr.Pe32->OptionalHeader.SizeOfHeaders - SectionHeaderOffset) / EFI_IMAGE_SIZEOF_SECTION_HEADER < (UINT32)Hdr.Pe32->FileHeader.NumberOfSections) {
+ ImageContext->ImageError = IMAGE_ERROR_UNSUPPORTED;
+ return RETURN_UNSUPPORTED;
+ }
+
+ //
+ // 4.2 Read last byte of Hdr.Pe32.OptionalHeader.SizeOfHeaders from the file.
//
Size = 1;
ReadSize = Size;
@@ -250,27 +268,43 @@ PeCoffLoaderGetPeHeader ( } else if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC) {
//
- // 1. Check FileHeader.SizeOfOptionalHeader filed.
+ // 1. Check FileHeader.NumberOfRvaAndSizes filed.
//
if (EFI_IMAGE_NUMBER_OF_DIRECTORY_ENTRIES < Hdr.Pe32Plus->OptionalHeader.NumberOfRvaAndSizes) {
ImageContext->ImageError = IMAGE_ERROR_UNSUPPORTED;
return RETURN_UNSUPPORTED;
}
+ //
+ // 2. Check the FileHeader.SizeOfOptionalHeader field.
+ // OptionalHeader.NumberOfRvaAndSizes is not bigger than 16, so
+ // OptionalHeader.NumberOfRvaAndSizes * sizeof (EFI_IMAGE_DATA_DIRECTORY) will not overflow.
+ //
+ HeaderWithoutDataDir = sizeof (EFI_IMAGE_OPTIONAL_HEADER64) - sizeof (EFI_IMAGE_DATA_DIRECTORY) * EFI_IMAGE_NUMBER_OF_DIRECTORY_ENTRIES;
+ if (((UINT32)Hdr.Pe32Plus->FileHeader.SizeOfOptionalHeader - HeaderWithoutDataDir) !=
+ Hdr.Pe32Plus->OptionalHeader.NumberOfRvaAndSizes * sizeof (EFI_IMAGE_DATA_DIRECTORY)) {
+ ImageContext->ImageError = IMAGE_ERROR_UNSUPPORTED;
+ return RETURN_UNSUPPORTED;
+ }
+ SectionHeaderOffset = ImageContext->PeCoffHeaderOffset + sizeof (UINT32) + sizeof (EFI_IMAGE_FILE_HEADER) + Hdr.Pe32Plus->FileHeader.SizeOfOptionalHeader;
//
- // 2. Check the OptionalHeader.SizeOfHeaders field.
- // This field will be use like the following mode, so just compare the result.
- // The DataDirectory array begin with 1, not 0, so here use < to compare not <=.
+ // 3. Check the FileHeader.NumberOfSections field.
//
- if (EFI_IMAGE_DIRECTORY_ENTRY_SECURITY + 1 < Hdr.Pe32Plus->OptionalHeader.NumberOfRvaAndSizes) {
- if (Hdr.Pe32Plus->OptionalHeader.SizeOfHeaders < (UINT32)((UINT8 *)(&Hdr.Pe32Plus->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_SECURITY + 1]) - (UINT8 *) &Hdr)) {
- ImageContext->ImageError = IMAGE_ERROR_UNSUPPORTED;
- return RETURN_UNSUPPORTED;
- }
+ if ((Hdr.Pe32Plus->OptionalHeader.SizeOfImage - SectionHeaderOffset) / EFI_IMAGE_SIZEOF_SECTION_HEADER <= Hdr.Pe32Plus->FileHeader.NumberOfSections) {
+ ImageContext->ImageError = IMAGE_ERROR_UNSUPPORTED;
+ return RETURN_UNSUPPORTED;
+ }
+
+ //
+ // 4. Check the OptionalHeader.SizeOfHeaders field.
+ //
+ if ((Hdr.Pe32Plus->OptionalHeader.SizeOfHeaders - SectionHeaderOffset) / EFI_IMAGE_SIZEOF_SECTION_HEADER < (UINT32)Hdr.Pe32Plus->FileHeader.NumberOfSections) {
+ ImageContext->ImageError = IMAGE_ERROR_UNSUPPORTED;
+ return RETURN_UNSUPPORTED;
}
//
- // 2.2 Read last byte of Hdr.Pe32Plus.OptionalHeader.SizeOfHeaders from the file.
+ // 4.2 Read last byte of Hdr.Pe32Plus.OptionalHeader.SizeOfHeaders from the file.
//
Size = 1;
ReadSize = Size;
@@ -385,6 +419,15 @@ PeCoffLoaderGetPeHeader ( if (SectionHeader.SizeOfRawData > 0) {
//
+ // Section data should bigger than the Pe header.
+ //
+ if (SectionHeader.VirtualAddress < ImageContext->SizeOfHeaders ||
+ SectionHeader.PointerToRawData < ImageContext->SizeOfHeaders) {
+ ImageContext->ImageError = IMAGE_ERROR_UNSUPPORTED;
+ return RETURN_UNSUPPORTED;
+ }
+
+ //
// Check the member data to avoid overflow.
//
if ((UINT32) (~0) - SectionHeader.PointerToRawData < SectionHeader.SizeOfRawData) {
|