CVE-2023-20919 in Android
Summary
by MITRE • 01/26/2023
In getStringsForPrefix of Settings.java, there is a possible prevention of package uninstallation due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-252663068
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 09/03/2025
The vulnerability identified as CVE-2023-20919 resides within the Android operating system's Settings.java file, specifically in the getStringsForPrefix method implementation. This flaw represents a logic error that fundamentally undermines the package uninstallation process, creating a potential security escalation path. The issue manifests in Android 13 environments and has been assigned the Android ID A-252663068, indicating its severity and classification within the Android security framework. The vulnerability's nature suggests it operates at a system-level interface where package management operations are handled, making it particularly concerning for device security and user privacy.
The technical flaw stems from a logic error within the getStringsForPrefix function that governs how system settings handle package-related string data. This logic error creates a condition where the system fails to properly validate or process package uninstallation requests, effectively preventing legitimate uninstallation operations from completing successfully. The flaw operates at the core of Android's package management system, where the Settings application interfaces with system-level components to manage installed applications. When an uninstallation request is made, the corrupted logic in getStringsForPrefix causes the system to either ignore the request entirely or to process it incorrectly, leaving the package in an inconsistent state.
The operational impact of this vulnerability extends beyond simple package management failures, creating potential for local privilege escalation without requiring any additional execution privileges or user interaction. This means that an attacker with local access to an Android 13 device could exploit this flaw to gain elevated privileges within the system, potentially allowing them to manipulate other applications or system components. The vulnerability's classification as a local escalation of privilege threat aligns with CWE-284, which addresses improper access control mechanisms within software systems. The lack of user interaction requirements makes this vulnerability particularly dangerous as it can be exploited automatically without the need for social engineering or additional attack vectors.
The implications of this vulnerability within the broader ATT&CK framework align with several techniques related to privilege escalation and persistence. Specifically, this flaw could enable adversaries to maintain access to compromised devices through system-level modifications that bypass normal uninstallation processes. The vulnerability's potential for local privilege escalation makes it particularly concerning for mobile security environments where device integrity is paramount. Security researchers have noted that such logic errors in core system components often provide attackers with pathways to deeper system compromise, as they typically affect fundamental operating system functions rather than isolated applications.
Mitigation strategies for CVE-2023-20919 should prioritize immediate system updates from Google, as this vulnerability affects the Android operating system's core package management functionality. Organizations and users should implement comprehensive monitoring for unauthorized package installations or removals that could indicate exploitation attempts. The vulnerability's nature suggests that patching the underlying logic error in Settings.java would resolve the issue completely, making timely security updates critical for maintaining device security. Additionally, security teams should consider implementing application control measures and monitoring for unusual package management activities that could indicate exploitation attempts. The vulnerability's potential for privilege escalation makes it essential to maintain robust security hygiene practices and ensure all Android devices receive timely security updates.