diff options
| author | sfu5 <sfu5@6f19259b-4bc3-4df7-8a09-765794883524> | 2012-09-06 02:15:59 +0000 |
|---|---|---|
| committer | sfu5 <sfu5@6f19259b-4bc3-4df7-8a09-765794883524> | 2012-09-06 02:15:59 +0000 |
| commit | 84bce75b08202a0d8e64d690dffbc329ed89dcc6 (patch) | |
| tree | d3e4365cc409b73a07df03f89edb0daaa7c992ca /SecurityPkg | |
| parent | 44c5d6b548414683e73901fb80ddb61252824ba9 (diff) | |
| download | edk2-platforms-84bce75b08202a0d8e64d690dffbc329ed89dcc6.tar.xz | |
Check the value of Hdr.dwLength for signed EFI image before image validation.
Signed-off-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>
Reviewed-by: Dong Guo <guo.dong@intel.com>
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13701 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'SecurityPkg')
| -rw-r--r-- | SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c b/SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c index b3648bdee4..9ea3a28ad9 100644 --- a/SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c +++ b/SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c @@ -1276,6 +1276,9 @@ DxeImageVerificationHandler ( // Authenticode specification.
//
PkcsCertData = (WIN_CERTIFICATE_EFI_PKCS *) WinCertificate;
+ if (PkcsCertData->Hdr.dwLength <= sizeof (PkcsCertData->Hdr)) {
+ goto Done;
+ }
AuthData = PkcsCertData->CertData;
AuthDataSize = PkcsCertData->Hdr.dwLength - sizeof(PkcsCertData->Hdr);
@@ -1290,7 +1293,8 @@ DxeImageVerificationHandler ( // The certificate is formatted as WIN_CERTIFICATE_UEFI_GUID which is described in UEFI Spec.
//
WinCertUefiGuid = (WIN_CERTIFICATE_UEFI_GUID *) WinCertificate;
- if (!CompareGuid(&WinCertUefiGuid->CertType, &gEfiCertPkcs7Guid)) {
+ if (!CompareGuid(&WinCertUefiGuid->CertType, &gEfiCertPkcs7Guid) ||
+ (WinCertUefiGuid->Hdr.dwLength <= OFFSET_OF(WIN_CERTIFICATE_UEFI_GUID, CertData))) {
goto Done;
}
AuthData = WinCertUefiGuid->CertData;
|