CVE-2025-3052: Critical InsydeH2O Firmware Vulnerability Bypasses Secure Boot

CVE-2025-3052 is a security vulnerability identified in InsydeH2O firmware, specifically involving an untrusted pointer dereference within Windows Secure Boot. This flaw allows an authorized attacker to locally bypass the Secure Boot security feature, potentially leading to the execution of unsigned code during the boot process.
Vulnerability Details:

• Description: The vulnerability arises from an untrusted pointer dereference in the Secure Boot process, enabling attackers with local access to bypass security measures intended to ensure that only trusted software is loaded during system startup.
• Impact: Successful exploitation could allow the execution of malicious code during the boot sequence, undermining system integrity and potentially leading to further compromise.

Affected Systems:
Systems utilizing InsydeH2O firmware are primarily affected. The specific versions impacted include:

• Kernel 5.2 versions prior to 05.29.09
• Kernel 5.3 versions prior to 05.38.09
• Kernel 5.4 versions prior to 05.46.09
• Kernel 5.5 versions prior to 05.54.09
• Kernel 5.6 versions prior to 05.61.09

These versions are susceptible to privilege escalation within System Management Mode (SMM) due to the identified vulnerability. (nvd.nist.gov)
Mitigation Steps:
To address this vulnerability, it is recommended to:

• Update Firmware: Apply the latest firmware updates provided by Insyde. The patched versions are:
• Kernel 5.2: Version 05.29.09
• Kernel 5.3: Version 05.38.09
• Kernel 5.4: Version 05.46.09
• Kernel 5.5: Version 05.54.09
• Kernel 5.6: Version 05.61.09
• Verify Secure Boot Configuration: Ensure that Secure Boot is properly configured and enabled to prevent unauthorized code execution during the boot process.
• Monitor System Integrity: Regularly check system logs and employ security tools to detect any unauthorized changes or anomalies during the boot sequence.

Additional Information:
For more detailed information and updates regarding this vulnerability, please refer to the Microsoft Security Response Center's advisory:
Staying informed about firmware vulnerabilities and promptly applying security updates are crucial steps in maintaining system security and integrity.

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Source: MSRC Security Update Guide - Microsoft Security Response Center