CVE-2020-0377 in Android
Summary
by MITRE • 10/14/2020
In gatt_process_read_by_type_rsp of gatt_cl.cc, there is a possible out of bounds read due to a missing bounds check. This could lead to remote information disclosure in the Bluetooth server with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-8.1 Android-9 Android-10 Android-11 Android-8.0Android ID: A-158833854
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Analysis
by VulDB Data Team • 11/19/2020
The vulnerability identified as CVE-2020-0377 represents a critical out-of-bounds read flaw within the Bluetooth GATT (Generic Attribute Profile) implementation of Android operating systems. This issue exists in the gatt_process_read_by_type_rsp function located in the gatt_cl.cc source file, which is part of the Bluetooth stack responsible for handling GATT client operations. The flaw stems from the absence of proper bounds checking when processing read by type response messages, creating a scenario where malicious Bluetooth devices could exploit this weakness to access memory locations beyond the intended buffer boundaries.
The technical nature of this vulnerability places it under CWE-129, which specifically addresses insufficient bounds checking, and aligns with ATT&CK technique T1059.007 for remote code execution through protocol manipulation. The vulnerability affects multiple Android versions including 8.0, 8.1, 9, 10, and 11, indicating a widespread impact across the Android ecosystem. When exploited, this flaw allows for remote information disclosure without requiring any additional privileges or user interaction, making it particularly dangerous as it can be triggered automatically during Bluetooth communication sessions.
The operational impact of CVE-2020-0377 extends beyond simple information disclosure, as it could potentially enable attackers to extract sensitive data from the Bluetooth server's memory space. This includes but is not limited to cryptographic keys, authentication credentials, or other confidential information stored within the device's memory. The vulnerability's remote exploitation capability means that attackers could potentially compromise Android devices within Bluetooth range without requiring physical access or user engagement, creating a significant risk for mobile devices in enterprise environments or public spaces where Bluetooth connectivity is prevalent.
Mitigation strategies for this vulnerability should prioritize immediate patching of affected Android versions through official security updates provided by Google and device manufacturers. Organizations should implement Bluetooth security policies that restrict unnecessary Bluetooth connectivity and disable Bluetooth when not actively needed. Network segmentation and monitoring solutions should be deployed to detect anomalous Bluetooth traffic patterns that might indicate exploitation attempts. Additionally, device administrators should consider implementing mobile device management solutions that can enforce security configurations and ensure timely deployment of security patches across all managed devices. The vulnerability's classification as a remote information disclosure threat underscores the importance of maintaining up-to-date security measures and conducting regular vulnerability assessments of Bluetooth-enabled devices within organizational networks.