CVE-2019-15367 in P10
Summary
by MITRE
The Haier P10 Android device with a build fingerprint of Haier/P10/P10:8.1.0/O11019/1532662449:user/release-keys contains a pre-installed app with a package name of com.mediatek.wfo.impl app (versionCode=27, versionName=8.1.0) that allows any app co-located on the device to modify a system property through an exported interface without proper authorization.
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Analysis
by VulDB Data Team • 02/14/2024
The vulnerability identified as CVE-2019-15367 resides within the Haier P10 Android device ecosystem, specifically targeting a pre-installed application component that operates with excessive privileges. This security flaw exists in the system's permission model where the com.mediatek.wfo.impl application, version 8.1.0, exposes an interface that permits arbitrary applications co-located on the same device to manipulate critical system properties. The vulnerability manifests through an exported interface that lacks proper authentication and authorization mechanisms, creating a pathway for malicious applications to gain unauthorized access to system-level configurations. The affected device operates on Android 8.1.0 with build fingerprint Haier/P10/P10:8.1.0/O11019/1532662449:user/release-keys, indicating a specific hardware and software combination that inherits this privilege escalation vulnerability.
The technical exploitation of this vulnerability stems from the improper handling of system property modifications through an exported interface within the MediaTek WFO implementation component. This interface allows any application running on the device to modify system properties without verifying the calling application's permissions or identity. The flaw represents a classic case of insufficient access control where the system property modification functionality is exposed without proper validation mechanisms. According to CWE-284, this vulnerability directly maps to inadequate access control issues where the system fails to enforce proper authorization checks before allowing modifications to protected system resources. The exported interface essentially creates a backdoor that bypasses normal Android security boundaries, enabling malicious applications to alter system configurations that should only be accessible to system-level components or applications with appropriate privileges.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass potential system compromise and data integrity violations. Any application installed on the device can exploit this vulnerability to modify critical system properties, potentially altering network configurations, security settings, or device behavior patterns. This capability could enable attackers to disable security features, redirect network traffic, or manipulate device functionality in ways that compromise user privacy and device integrity. The vulnerability affects the fundamental security model of the Android operating system by allowing unauthorized modification of system-level parameters that typically require system-level privileges or root access. Attackers could leverage this flaw to establish persistent access, modify device security policies, or create conditions that facilitate further exploitation. The impact aligns with ATT&CK technique T1546.001 which involves modifying system binaries or configuration files to achieve persistence or privilege escalation.
Mitigation strategies for CVE-2019-15367 should focus on immediate system hardening measures and long-term architectural improvements. Device manufacturers should implement proper access control mechanisms within the exported interfaces, ensuring that any system property modifications require appropriate authentication and authorization checks. The solution involves removing or restricting the exported interface that allows arbitrary applications to modify system properties, or implementing robust permission validation before allowing such modifications. Security patches should be deployed to update the com.mediatek.wfo.impl application to version that properly validates access controls and removes the vulnerable interface. Users should be advised to avoid installing untrusted applications on affected devices, as these applications could exploit the vulnerability to gain unauthorized system access. The remediation approach should follow security best practices outlined in NIST SP 800-53 for access control and system integrity protection, ensuring that system properties modification requires explicit authorization and proper privilege validation. Additionally, the device should implement proper application sandboxing and privilege separation to prevent malicious applications from leveraging this vulnerability to compromise the entire system.