CVE-2019-9326 in Android
Summary
by MITRE
In Bluetooth, there is a possible out of bounds read due to a missing bounds check. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation. Product: AndroidVersions: Android-10Android ID: A-111215173
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Analysis
by VulDB Data Team • 09/12/2020
The vulnerability identified as CVE-2019-9326 represents a critical out-of-bounds read 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 scenario where malicious actors can exploit memory access patterns without requiring any user interaction or additional privileges. The vulnerability exists within the core Bluetooth protocol handling mechanisms that process incoming wireless communications, specifically affecting how the system validates buffer boundaries during packet processing operations.
The technical nature of this flaw places it squarely within CWE-129, which categorizes issues related to insufficient boundary checking in software systems. When Bluetooth packets are received and processed, the system fails to properly validate the length and boundaries of incoming data structures, allowing an attacker to craft malicious packets that trigger memory access violations. This particular implementation error enables attackers to read memory contents beyond allocated buffers, potentially exposing sensitive information such as cryptographic keys, system credentials, or other confidential data stored in adjacent memory locations. The absence of proper bounds validation creates a direct path for information disclosure attacks that can be executed remotely over Bluetooth networks.
From an operational perspective, this vulnerability presents significant risk to Android 10 devices since it requires no user interaction for exploitation and can be triggered through standard Bluetooth communication protocols. The attack surface is particularly concerning given the widespread use of Bluetooth technology in mobile devices and the inherent trust relationships established between Bluetooth-enabled devices. An attacker positioned within Bluetooth range of a vulnerable device can potentially extract sensitive information without any user awareness or intervention, making this vulnerability particularly dangerous in environments where Bluetooth is frequently used for device pairing, file transfers, or wireless connectivity. The remote exploitation capability means that adversaries can target devices from considerable distances, potentially compromising device security without physical access or complex attack vectors.
The implications of this vulnerability extend beyond simple information disclosure, as the extracted data could potentially be used to facilitate further attacks or compromise other system components. Security professionals should consider this vulnerability in the context of the ATT&CK framework, particularly under the information gathering and credential access phases, where adversaries might leverage such information to establish persistent access or escalate privileges. The lack of user interaction requirements makes this vulnerability particularly dangerous in mobile environments where users frequently connect to unknown Bluetooth devices or operate in public spaces where such attacks could be easily executed. Organizations should prioritize patch deployment and implement network monitoring solutions to detect potential exploitation attempts, while also considering device hardening measures that limit Bluetooth functionality in high-security environments.