CVE-2019-9363 in Android
Summary
by MITRE
In Bluetooth, there is a possible out of bounds write due to a missing bounds check. This could lead to remote code execution with no additional execution privileges needed. User interaction is needed for exploitation. Product: AndroidVersions: Android-10Android ID: A-123584306
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Analysis
by VulDB Data Team • 09/13/2020
The vulnerability identified as CVE-2019-9363 represents a critical out-of-bounds write flaw within the Bluetooth implementation of Android 10 systems. This issue stems from a fundamental missing bounds check in the Bluetooth stack processing logic, creating a potential pathway for remote code execution attacks. The vulnerability resides in the core Bluetooth protocol handling mechanisms where insufficient input validation allows malicious data to overwrite memory regions beyond the intended buffer boundaries. Such a flaw fundamentally compromises the memory safety model of the affected Android system and represents a classic example of a buffer overflow vulnerability that can be exploited without requiring elevated privileges or local access.
The technical exploitation of this vulnerability requires user interaction, typically through Bluetooth device pairing or connection attempts, making it particularly concerning for mobile environments where users frequently interact with wireless devices. The attack vector involves sending specially crafted Bluetooth packets that trigger the out-of-bounds write condition when the system processes incoming Bluetooth data. This scenario aligns with CWE-129, which specifically addresses issues related to insufficient bounds checking in input validation. The vulnerability's classification as a remote code execution flaw indicates that attackers can potentially execute arbitrary code on affected devices without requiring physical access or administrative privileges, significantly expanding the attack surface.
From an operational impact perspective, this vulnerability affects all Android 10 devices and represents a serious security risk for mobile users who may unknowingly connect to malicious Bluetooth devices. The requirement for user interaction means that social engineering attacks could be particularly effective in exploiting this vulnerability, as users might be诱导 to connect to compromised Bluetooth devices in public spaces or during normal device usage. The potential for remote code execution creates numerous attack scenarios including data theft, device takeover, and the installation of persistent malware. This vulnerability directly impacts the CIA triad by compromising confidentiality, integrity, and availability of user data and device functionality.
Security mitigations for CVE-2019-9363 primarily involve applying the official Android security patches released by Google, which include enhanced bounds checking mechanisms and improved input validation in the Bluetooth subsystem. Organizations should implement comprehensive device management policies that ensure all Android 10 devices receive timely security updates and consider network monitoring solutions that can detect anomalous Bluetooth traffic patterns. The remediation process should also include user education about the risks of connecting to unknown Bluetooth devices and the importance of keeping devices updated. From an ATT&CK framework perspective, this vulnerability maps to techniques involving initial access through wireless communications and privilege escalation through code execution, making it particularly relevant for organizations implementing threat hunting and incident response procedures. Additionally, system administrators should consider implementing Bluetooth access controls and network segmentation to limit potential attack vectors and reduce the overall risk exposure of affected environments.