CVE-2025-3052 in Windows
Summary
by MITRE • 06/10/2025
An arbitrary write vulnerability in Microsoft signed UEFI firmware allows for code execution of untrusted software. This allows an attacker to control its value, leading to arbitrary memory writes, including modification of critical firmware settings stored in NVRAM. Exploiting this vulnerability could enable security bypasses, persistence mechanisms, or full system compromise.
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Analysis
by VulDB Data Team • 06/11/2025
This vulnerability represents a critical flaw in the Unified Extensible Firmware Interface firmware implementation within Microsoft-signed firmware components, specifically targeting the firmware's memory management and validation mechanisms. The arbitrary write vulnerability exists within the UEFI firmware execution environment where proper input validation and memory access controls have been insufficiently implemented, creating a pathway for malicious actors to manipulate firmware state through controlled memory writes. The flaw manifests when the firmware fails to properly validate or sanitize data inputs that are subsequently written to memory locations, particularly affecting the Non-Volatile RAM storage areas where critical firmware configuration parameters are maintained. This vulnerability directly impacts the firmware's integrity protection mechanisms and undermines the fundamental security assumptions of the Trusted Platform Module and secure boot processes that rely on firmware immutability. The vulnerability operates at a low system level where traditional operating system security controls are ineffective, making it particularly dangerous for enterprise environments where firmware security is critical to overall system protection.
The technical exploitation of this vulnerability follows a pattern consistent with advanced persistent threat techniques and aligns with attack vectors categorized under the ATT&CK framework's firmware modification tactics. An attacker can leverage this flaw to write arbitrary data to memory locations within the UEFI firmware, potentially modifying critical NVRAM settings that control boot behavior, system configuration parameters, or security policy enforcement. The vulnerability allows for code execution of untrusted software by manipulating firmware code or data structures, effectively bypassing traditional security boundaries that separate user space from system firmware. This capability enables attackers to establish persistence mechanisms that survive operating system reinstallation or complete system resets, as the modifications occur at the firmware level where standard recovery procedures are ineffective. The vulnerability's impact extends beyond simple privilege escalation to include complete system compromise through firmware-level rootkits or backdoor implementations that can operate below the operating system layer.
The operational impact of this vulnerability is severe and multifaceted, affecting organizations across all sectors that rely on Microsoft-signed firmware for their hardware platforms. System administrators face challenges in detecting and mitigating attacks that occur below the operating system layer, as traditional security monitoring tools and endpoint protection solutions cannot effectively detect firmware-level modifications. The vulnerability creates opportunities for attackers to establish long-term persistence within networks, potentially enabling data exfiltration, lateral movement, or system disruption without detection. Organizations may experience complete loss of system integrity and trust, as the firmware modifications can alter security policies, disable security features, or create covert communication channels. The vulnerability's exploitation can result in significant financial losses, regulatory compliance violations, and reputational damage when organizations discover that their systems have been compromised at the firmware level. The attack surface is particularly concerning for critical infrastructure, government agencies, and financial institutions where system integrity and security are paramount to operations.
Mitigation strategies for this vulnerability must address the firmware-level nature of the flaw through comprehensive security measures that extend beyond traditional operating system protections. Organizations should implement firmware integrity monitoring solutions that can detect unauthorized modifications to UEFI firmware components and NVRAM settings, utilizing techniques aligned with the CWE classification for firmware security vulnerabilities. The recommended approach includes enabling secure boot with proper signature validation, implementing firmware version control, and establishing regular firmware integrity checks using hardware-based attestation mechanisms. Organizations should also consider implementing firmware lockdown procedures that prevent unauthorized firmware modifications and establish secure update processes with proper cryptographic validation. The mitigation strategy should incorporate regular firmware vulnerability assessments, maintain updated firmware images from trusted sources, and implement network-based monitoring to detect potential exploitation attempts. Additionally, organizations should develop incident response procedures specifically tailored for firmware-level compromises, as traditional forensic analysis methods may be insufficient for investigating attacks that occur below the operating system layer. The security posture should include regular firmware security training for system administrators and integration of firmware security considerations into overall cybersecurity risk management frameworks.