CVE-2022-34302 in Datasys Bootloader
Summary
by MITRE • 08/26/2022
A flaw was found in New Horizon Datasys bootloaders before 2022-06-01. An attacker may use this bootloader to bypass or tamper with Secure Boot protections. In order to load and execute arbitrary code in the pre-boot stage, an attacker simply needs to replace the existing signed bootloader currently in use with this bootloader. Access to the EFI System Partition is required for booting using external media.
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Analysis
by VulDB Data Team • 06/12/2026
The vulnerability identified as CVE-2022-34302 represents a critical weakness in the security architecture of New Horizon Datasys bootloaders that existed prior to the 2022-06-01 release date. This flaw fundamentally undermines the integrity of the pre-boot execution environment by creating a pathway for attackers to circumvent the Secure Boot mechanism that is designed to prevent unauthorized code execution during system startup. The vulnerability specifically targets the bootloader component which serves as the first line of defense in the system boot process, making it a prime target for attackers seeking to establish persistent footholds within target environments. The security implications extend beyond simple code execution as this flaw enables attackers to manipulate the boot process at a fundamental level where traditional security controls are typically most effective.
The technical nature of this vulnerability stems from the lack of proper authentication and verification mechanisms within the affected bootloader implementations. Attackers can exploit this weakness by simply replacing the legitimate signed bootloader with a malicious version that has been crafted to bypass Secure Boot protections. This replacement process requires access to the EFI System Partition which serves as the storage location for boot-related files in UEFI-based systems. The vulnerability essentially creates a backdoor that allows execution of arbitrary code in the pre-boot stage, which occurs before the operating system loads and before most endpoint protection mechanisms become active. This characteristic places the vulnerability in the category of bootkits and rootkits, where attackers can establish persistence before traditional security controls can detect or prevent malicious activity. The flaw directly relates to CWE-1045 which describes insufficient verification of bootloader integrity and CWE-1046 which addresses inadequate protection of boot processes.
The operational impact of this vulnerability is severe and multifaceted, as it enables attackers to establish persistent and stealthy access to target systems. Once an attacker successfully replaces the legitimate bootloader, they can execute malicious code during the boot process without detection by traditional security mechanisms that operate within the running operating system. This capability allows for complete system compromise, enabling attackers to install additional malware, exfiltrate data, or establish command and control channels that persist across system reboots. The vulnerability also creates opportunities for attackers to manipulate system firmware and potentially escalate privileges to the highest levels of system access. From an attack perspective, this represents a significant reduction in attack surface complexity since the attacker only needs to replace a single file rather than exploit multiple vulnerabilities across different system components. The vulnerability aligns with ATT&CK technique T1068 which describes local privilege escalation and T1542 which covers boot or logon initialization scripts, making it particularly dangerous for enterprise environments where system integrity is paramount.
The mitigation strategy for this vulnerability requires immediate action to update or replace affected bootloaders with versions that have been patched to properly validate bootloader integrity. System administrators must ensure that all New Horizon Datasys devices are updated to bootloader versions released after 2022-06-01 which contain the necessary security fixes. Additionally, organizations should implement robust access controls for the EFI System Partition to prevent unauthorized modifications to boot-related files. The recommended approach includes enabling secure boot policies that verify the authenticity of bootloaders, implementing firmware integrity monitoring solutions, and establishing regular audit procedures to detect unauthorized bootloader changes. Physical security measures should also be considered to prevent attackers from gaining access to systems that would allow them to modify the EFI System Partition. Organizations should also consider implementing network-based detection mechanisms to identify systems that may have been compromised through this vulnerability, as the malicious bootloader would likely generate network traffic patterns that differ from normal system behavior. The remediation process should include comprehensive testing of updated bootloaders to ensure compatibility with existing system configurations and proper operation of security features.