# It Starts At The Motherboard… Source: https://www.youtube.com/watch?v=BTjj1ILCwRs Recap page: https://rapidrecap.app/video/BTjj1ILCwRs Generated: 2025-08-06T15:32:55.239+00:00 --- ## Quick Overview Gigabyte motherboards are vulnerable to UEFI malware that bypasses Secure Boot due to flaws in their SMM firmware, allowing attackers to gain persistent control by overwriting critical system memory. **Key Points:** - Gigabyte motherboards are vulnerable to UEFI malware that bypasses Secure Boot due to flaws in their SMM firmware. - Four high-severity vulnerabilities (CVE-2025-7029, CVE-2025-7028, CVE-2025-7027, CVE-2025-7026) allow attackers to gain elevated privileges and persist on systems. - Malware like BlackLotus can exploit these flaws to achieve rootkit-level control, even surviving OS reinstallation. - The SMM layer operates at a higher privilege level than the operating system, making vulnerabilities here particularly dangerous. - Attackers can write malicious code to SMM RAM, potentially corrupting or overwriting the trusted firmware. - The NSA has released guidance on defending against such attacks, recommending system updates and hardening of security policies. ![Screenshot at 00:03: The video begins by displaying a BleepingComputer article headline that reads "Gigabyte motherboards vulnerable to UEFI malware bypassing Secure Boot," setting the stage for the discussion on firmware security flaws.](https://ss.rapidrecap.app/screens/BTjj1ILCwRs/00-00-03.png) **Context:** This video discusses critical security vulnerabilities found in the firmware of Gigabyte motherboards, specifically related to the System Management Mode (SMM) and its interaction with Secure Boot. These vulnerabilities, discovered by researchers at Binarly, allow for the bypass of security measures and persistent malware infections. The video explains the fundamental layers of trust and privilege within a computer's operating system and firmware, emphasizing the elevated status of SMM, which is designed to protect the system during boot. ## Detailed Analysis This video discusses a critical vulnerability found in Gigabyte motherboards that allows UEFI malware to bypass Secure Boot. The vulnerability, identified by researchers at Binarly, stems from flaws in the System Management Mode (SMM) firmware, specifically within the SMI handler. Four specific CVEs (CVE-2025-7029, CVE-2025-7028, CVE-2025-7027, and CVE-2025-7026) are detailed, all carrying a high-severity score of 8.2. These flaws enable attackers to gain elevated privileges, bypass security defenses, and persist even after operating system reinstallation. The video explains the layered trust model in computer systems, from user mode programs to the SMM (UEFI) layer, highlighting how vulnerabilities at lower levels, like SMM, are particularly dangerous because they have higher privileges and are harder to detect. The malware, such as BlackLotus, can exploit these vulnerabilities to gain rootkit-level access. The video also touches upon similar vulnerabilities found in other vendors' firmware and advises users to update their systems and security software. ### Vulnerability Overview - Gigabyte motherboards vulnerable to UEFI malware bypassing Secure Boot due to SMM firmware flaws ### Technical Details - Four specific CVEs identified (CVE-2025-7029, CVE-2025-7028, CVE-2025-7027, CVE-2025-7026) with high severity score ### Impact - Attackers can elevate privileges, bypass security, and achieve persistence ### System Layers Explained - User Mode Program, Operating System, Hypervisor, SMM (UEFI) and their trust/power hierarchy ### Malware Examples - BlackLotus and other UEFI-level malware leveraging these vulnerabilities ### Mitigation Advice - Apply security updates, use endpoint security software, monitor firmware integrity ![Screenshot at 00:03: A screenshot of the BleepingComputer article detailing the vulnerability in Gigabyte motherboards.](https://ss.rapidrecap.app/screens/BTjj1ILCwRs/00-00-03.png) ![Screenshot at 00:20: A diagram illustrating the layered trust and power model in computer systems, from user mode programs to SMM \(UEFI\).](https://ss.rapidrecap.app/screens/BTjj1ILCwRs/00-00-20.png) ![Screenshot at 01:16: A visual representation of the trust and power hierarchy within computer systems, highlighting the SMM \(UEFI\) layer.](https://ss.rapidrecap.app/screens/BTjj1ILCwRs/00-01-16.png) ![Screenshot at 03:13: A list of specific CVE identifiers related to the SMM memory corruption vulnerabilities.](https://ss.rapidrecap.app/screens/BTjj1ILCwRs/00-03-13.png) ![Screenshot at 04:01: A diagram showing the progression of trust and power from user mode programs down to SMM \(UEFI\).](https://ss.rapidrecap.app/screens/BTjj1ILCwRs/00-04-01.png) ![Screenshot at 05:18: A screenshot from the Binarly advisory detailing the vulnerability information and affected products.](https://ss.rapidrecap.app/screens/BTjj1ILCwRs/00-05-18.png) ![Screenshot at 06:05: Pseudocode snippet showing how the system handles SMM register access and commands.](https://ss.rapidrecap.app/screens/BTjj1ILCwRs/00-06-05.png) ![Screenshot at 07:51: Pseudocode snippet demonstrating the ReadFlash function and its potential for SMM corruption.](https://ss.rapidrecap.app/screens/BTjj1ILCwRs/00-07-51.png) ![Screenshot at 08:07: A snippet from the Binarly website detailing the "Potential Impact" of memory corruption vulnerabilities.](https://ss.rapidrecap.app/screens/BTjj1ILCwRs/00-08-07.png) ![Screenshot at 09:06: A graphic illustrating the layered trust model in computer systems, emphasizing the SMM \(UEFI\) layer.](https://ss.rapidrecap.app/screens/BTjj1ILCwRs/00-09-06.png)