CVE-2017-11026 in Android
Summary
by MITRE
In android for MSM, Firefox OS for MSM, QRD Android, with all Android releases from CAF using the Linux kernel, while flashing FRP partition using reference FRP unlock, authentication method can be compromised for static keys.
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Analysis
by VulDB Data Team • 12/07/2019
The vulnerability identified as CVE-2017-11026 represents a critical security flaw affecting multiple Android-based platforms including MSM variants, Firefox OS for MSM, and QRD Android systems. This issue specifically targets the flashing process of the Factory Reset Protection (FRP) partition, which serves as a fundamental security mechanism designed to prevent unauthorized device access and data recovery. The vulnerability arises from improper handling of authentication methods during the FRP unlock process, potentially allowing attackers to bypass critical security controls that protect device integrity and user data.
The technical implementation of this vulnerability stems from the Linux kernel components used across these platforms, particularly within the flashing mechanisms that manage the FRP partition. When reference FRP unlock procedures are executed, the system's authentication framework fails to properly validate or enforce security measures for static keys used in the process. This weakness creates an attack surface where malicious actors can exploit the static key handling to compromise the authentication mechanism, potentially gaining unauthorized access to device functions and data protection measures. The flaw manifests during the partition flashing operations, where the system should enforce strict verification protocols but instead allows for potential key manipulation or bypass.
The operational impact of CVE-2017-11026 extends beyond simple device security breaches, as it undermines the fundamental protection mechanisms that prevent unauthorized access to mobile devices. Attackers leveraging this vulnerability can potentially perform unauthorized factory resets, bypass device locks, and access sensitive user data without proper authentication. This compromise directly affects device integrity and user privacy, particularly in enterprise environments where mobile devices contain confidential corporate information. The vulnerability affects all Android releases from CAF (Code Aurora Forum) that utilize the Linux kernel, creating a widespread security concern across multiple device manufacturers and platform implementations.
Security implications of this vulnerability align with CWE-310, which addresses cryptographic weaknesses and authentication failures in system components. The flaw demonstrates poor implementation of static key management within the device's security framework, creating opportunities for privilege escalation and unauthorized system access. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and credential access, as attackers can exploit the authentication bypass to gain deeper system access. The vulnerability also relates to T1068, which covers local privilege escalation, and T1078, which covers valid accounts and legitimate credentials.
Mitigation strategies for CVE-2017-11026 require immediate firmware updates from device manufacturers, as the vulnerability resides in kernel-level components that cannot be patched through standard software updates. Organizations should implement strict device provisioning controls and ensure all devices are running patched firmware versions before deployment. Network administrators should monitor for suspicious device behavior and implement additional authentication layers beyond the basic FRP protection. The vulnerability highlights the importance of secure boot processes and proper key management protocols, suggesting that organizations should establish robust device lifecycle management procedures that include regular security assessments and firmware validation checks to prevent exploitation of similar authentication bypass vulnerabilities.