Description

EAZ EazyFix 12.9 allows a Security Feature Bypass related to a "Missing Cryptographic Step" associated with "Secure Boot disable."

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.0",
  "pubDate": "2026-08-27T20:17:18.243Z",
  "pubdate": "2026-08-27T20:17:18.243Z",
  "executiveSummary": "EAZ EazyFix version 12.9 is susceptible to a security feature bypass vulnerability categorized as a missing cryptographic step. This flaw allows an attacker to disable the Secure Boot mechanism without proper validation or authorization. The vulnerability stems from an improper implementation of security controls that govern boot-time integrity, effectively neutralizing the hardware-rooted chain of trust. Exploitation of this vulnerability enables a malicious actor to compromise the system boot process, potentially leading to the execution of unauthorized or malicious firmware, bootloaders, or operating system kernels. The impact of this security lapse is significant, as it subverts the primary defensive layer designed to prevent rootkits and bootkits. An attacker possessing local access—or potentially remote access depending on pre-boot environment configuration—can leverage this bypass to achieve persistence and circumvent subsequent OS-level security controls. The risk implication is a total loss of platform integrity, rendering existing software-based security measures unreliable, as the system can no longer guarantee the authenticity of the boot environment.",
  "technicalDetails": "The vulnerability resides within the low-level boot management components of EAZ EazyFix 12.9. The root cause is identified as a 'Missing Cryptographic Step' during the execution flow related to the 'Secure Boot disable' function. In a standard Unified Extensible Firmware Interface (UEFI) environment, the Secure Boot feature relies on cryptographic signature verification to ensure that only trusted, signed binaries are executed during the boot sequence. This vulnerability indicates that the product implements a administrative function to modify Secure Boot state without enforcing the necessary cryptographic challenges or signature verification checks that should act as a gatekeeper for such sensitive operations.\nThe exploitation method involves an attacker interacting with the vulnerable module to trigger the disablement of Secure Boot. Because the required cryptographic validation is omitted, the application fails to authenticate the request or verify that the state change is authorized by a hardware-backed security token or a privileged administrator using a secure channel. This effectively allows any actor capable of invoking this function to toggle the system security state to an insecure configuration.\nThe attack flow proceeds as follows: First, the attacker identifies the interface or API call within EazyFix that facilitates Secure Boot state management. Second, the attacker triggers the insecure function to request a transition from an enabled Secure Boot state to a disabled state. Third, due to the missing cryptographic step, the application executes the request without performing signature verification or multi-factor authorization. Finally, upon the next reboot, the firmware executes without the protection of Secure Boot, allowing the attacker to inject malicious bootloaders, kernel-level drivers, or rootkits that are not digitally signed by a trusted authority. Post-exploitation, the system is fully compromised at the boot level; since the compromise occurs before the Operating System loads, the attacker gains full control over the execution environment, including the ability to hook kernel functions, intercept data, and bypass integrity checks implemented by the OS security architecture. This vulnerability requires local access to the system configuration interface, but the persistence achieved post-reboot grants the attacker a permanent foothold on the machine, circumventing any subsequent cryptographic or software-based remediation attempts made within the OS."
}