CVE-2020-0108 in Android
Summary
by MITRE
In postNotification of ServiceRecord.java, there is a possible bypass of foreground process restrictions due to an uncaught exception. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10 Android-8.1 Android-9Android ID: A-140108616
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Analysis
by VulDB Data Team • 08/12/2020
The vulnerability identified as CVE-2020-0108 resides within the Android operating system's service management framework, specifically in the postNotification method of the ServiceRecord.java component. This flaw represents a critical security weakness that allows for potential privilege escalation without requiring any additional execution privileges or user interaction. The vulnerability stems from an uncaught exception that occurs during the notification posting process, creating a scenario where foreground process restrictions can be bypassed. Such bypass mechanisms are particularly dangerous as they undermine fundamental Android security controls designed to prevent unauthorized access to system resources and processes.
The technical implementation of this vulnerability involves a failure in exception handling within the Android framework's service record management system. When postNotification is invoked, the system should enforce strict foreground process restrictions to prevent malicious applications from exploiting system resources. However, due to the unhandled exception, the normal flow of security checks is disrupted, allowing unauthorized processes to potentially operate with elevated privileges. This issue affects multiple Android versions including Android 8.1, 9, and 10, indicating a widespread problem within the Android security architecture. The vulnerability's classification aligns with CWE-459, which describes incomplete cleanup issues that can lead to security weaknesses in system components.
The operational impact of CVE-2020-0108 extends beyond simple privilege escalation, as it fundamentally compromises the Android security model's integrity. Attackers can exploit this vulnerability to gain unauthorized access to system-level resources without requiring any user interaction, making it particularly dangerous for mobile device security. The bypass of foreground process restrictions means that malicious applications could potentially run in the background with elevated privileges, accessing sensitive data or performing unauthorized operations. This vulnerability directly impacts the Android security framework's ability to maintain proper process isolation and privilege boundaries, potentially allowing for complete system compromise.
From a security mitigation perspective, this vulnerability requires immediate attention from Android device manufacturers and system administrators. The recommended approach involves applying the latest security patches provided by Google, which address the specific exception handling flaw in ServiceRecord.java. Organizations should prioritize deployment of these updates across all affected Android versions to prevent potential exploitation. Additionally, system administrators should implement monitoring solutions to detect unusual process behavior that might indicate exploitation attempts. The vulnerability's nature suggests that it may be exploited through malicious applications that attempt to manipulate system notifications, making application vetting and runtime monitoring essential defensive measures. This issue represents a significant concern for enterprise security teams as it could enable attackers to gain persistent access to mobile devices without user interaction, potentially leading to data breaches or further system compromise. The ATT&CK framework categorizes this vulnerability under privilege escalation techniques, specifically targeting Android's process management and security restriction enforcement mechanisms.