GetEfiGlobalVariable2() is used in some instances when looking up the SecureBoot UEFI variable. The API can fail in certain circumstances, for example, if AllocatePool() fails or if gRT->GetVariable() fails. In the case of secure boot checks, it is critical that this return value is checked. if an attacker can cause the API to fail, it would currently constitute a secure boot bypass. This return value check is missing from DxeImageVerificationHandler.
GetEfiGlobalVariable2() is used in some instances when looking up the SecureBoot UEFI variable. The API can fail in certain circumstances, for example, if AllocatePool() fails or if gRT->GetVariable() fails. In the case of secure boot checks, it is critical that this return value is checked. if an attacker can cause the API to fail, it would currently constitute a secure boot bypass. This return value check is missing from DxeImageVerificationHandler.
https://bugzilla.tianocore.org/show_bug.cgi?id=2167
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