From 284dbac43da752ee34825c8b3f6f9e8281cb5a19 Mon Sep 17 00:00:00 2001 From: Shanmugavel Pakkirisamy Date: Mon, 6 May 2024 17:53:09 +0800 Subject: MdeModulePkg: Potential UINT32 overflow in S3 ResumeCount REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4677 Attacker able to modify physical memory and ResumeCount. System will crash/DoS when ResumeCount reaches its MAX_UINT32. Cc: Zhiguang Liu Cc: Dandan Bi Cc: Liming Gao Signed-off-by: Pakkirisamy ShanmugavelX Reviewed-by: Liming Gao --- .../FirmwarePerformanceDataTablePei/FirmwarePerformancePei.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/MdeModulePkg/Universal/Acpi/FirmwarePerformanceDataTablePei/FirmwarePerformancePei.c b/MdeModulePkg/Universal/Acpi/FirmwarePerformanceDataTablePei/FirmwarePerformancePei.c index 2f2b2a80b2..2ba9215226 100644 --- a/MdeModulePkg/Universal/Acpi/FirmwarePerformanceDataTablePei/FirmwarePerformancePei.c +++ b/MdeModulePkg/Universal/Acpi/FirmwarePerformanceDataTablePei/FirmwarePerformancePei.c @@ -112,11 +112,15 @@ FpdtStatusCodeListenerPei ( // S3ResumeTotal = MultU64x32 (AcpiS3ResumeRecord->AverageResume, AcpiS3ResumeRecord->ResumeCount); AcpiS3ResumeRecord->ResumeCount++; - AcpiS3ResumeRecord->AverageResume = DivU64x32 (S3ResumeTotal + AcpiS3ResumeRecord->FullResume, AcpiS3ResumeRecord->ResumeCount); + if (AcpiS3ResumeRecord->ResumeCount > 0) { + AcpiS3ResumeRecord->AverageResume = DivU64x32 (S3ResumeTotal + AcpiS3ResumeRecord->FullResume, AcpiS3ResumeRecord->ResumeCount); + DEBUG ((DEBUG_INFO, "\nFPDT: S3 Resume Performance - AverageResume = 0x%x\n", AcpiS3ResumeRecord->AverageResume)); + } else { + DEBUG ((DEBUG_ERROR, "\nFPDT: S3 ResumeCount reaches the MAX_UINT32 value. S3 ResumeCount record reset to Zero.")); + } - DEBUG ((DEBUG_INFO, "FPDT: S3 Resume Performance - ResumeCount = %d\n", AcpiS3ResumeRecord->ResumeCount)); - DEBUG ((DEBUG_INFO, "FPDT: S3 Resume Performance - FullResume = %ld\n", AcpiS3ResumeRecord->FullResume)); - DEBUG ((DEBUG_INFO, "FPDT: S3 Resume Performance - AverageResume = %ld\n", AcpiS3ResumeRecord->AverageResume)); + DEBUG ((DEBUG_INFO, "FPDT: S3 Resume Performance - ResumeCount = 0x%x\n", AcpiS3ResumeRecord->ResumeCount)); + DEBUG ((DEBUG_INFO, "FPDT: S3 Resume Performance - FullResume = 0x%x\n", AcpiS3ResumeRecord->FullResume)); // // Update S3 Suspend Performance Record. -- cgit v1.2.3