CVE-2020-0358 in Android
Summary
by MITRE
In SurfaceFlinger, there is a possible use after free due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-150227563
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Analysis
by VulDB Data Team • 09/18/2020
The vulnerability identified as CVE-2020-0358 resides within SurfaceFlinger, a critical component of the Android operating system responsible for compositing and managing graphical surfaces on mobile devices. This flaw represents a use-after-free condition that emerges from a race condition inherent in the system's memory management processes. The vulnerability specifically affects Android 11 and is catalogued under Android ID A-150227563, indicating its severity and the need for immediate attention from device manufacturers and security professionals.
The technical nature of this vulnerability stems from improper synchronization mechanisms within SurfaceFlinger's implementation. A race condition occurs when multiple threads or processes attempt to access and modify shared memory resources without proper coordination, leading to situations where memory that has been freed becomes accessible to other processes before it is properly deallocated. In this case, the flaw allows an attacker to manipulate the memory state during the execution of graphical operations, creating opportunities for arbitrary code execution.
The operational impact of this vulnerability extends beyond typical security concerns, as it enables local privilege escalation to system level execution privileges. This means that an attacker with minimal user-level access could potentially gain complete control over the device's operating system. The exploitation does not require user interaction, making it particularly dangerous as it can be triggered automatically without any explicit user action. This characteristic aligns with the ATT&CK framework's privilege escalation tactics, specifically targeting the system-level execution domain where attackers can manipulate core system components.
From a cybersecurity perspective, this vulnerability demonstrates the complexity of modern mobile operating systems where graphics rendering components like SurfaceFlinger must balance performance with security. The use-after-free condition represents a classic memory safety issue that has been extensively documented in the CWE database under category 416, which specifically addresses "Use After Free" vulnerabilities. The race condition aspect further complicates remediation efforts as it requires careful analysis of thread synchronization mechanisms and memory lifecycle management within the Android framework.
The implications for device security are significant, particularly in enterprise environments where mobile devices serve as primary access points to corporate networks and sensitive data. The vulnerability's potential for automatic exploitation without user interaction means that devices could be compromised simply by running normal applications or system processes. Security professionals should consider implementing immediate mitigations including firmware updates, process monitoring, and runtime protection mechanisms to prevent exploitation. The vulnerability also highlights the importance of continuous security auditing of core system components and the need for robust memory safety practices in mobile operating system development.
Organizations should prioritize patch management for affected Android 11 devices while monitoring for potential exploitation attempts through system logs and security event analysis. The vulnerability's classification as a local privilege escalation issue means that traditional network-based security measures may not be sufficient to prevent exploitation, requiring a more comprehensive approach to mobile device security that includes endpoint protection and behavioral analysis of system processes.