CVE-2017-0785 in MICROS Handheld Terminal
Summary
by MITRE
A information disclosure vulnerability in the Android system (bluetooth). Product: Android. Versions: 4.4.4, 5.0.2, 5.1.1, 6.0, 6.0.1, 7.0, 7.1.1, 7.1.2, 8.0. Android ID: A-63146698.
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Analysis
by VulDB Data Team • 06/11/2024
The vulnerability CVE-2017-0785 represents a critical information disclosure flaw within the Android Bluetooth implementation that affects multiple versions of the operating system from 4.4.4 through 8.0. This issue resides in the Bluetooth stack and specifically impacts how the system handles certain Bluetooth service discovery requests. The vulnerability stems from inadequate input validation and improper handling of malformed Bluetooth protocol messages, creating a pathway for unauthorized data exposure. The Android ID A-63146698 indicates this was tracked as a significant security concern within Google's internal vulnerability management system, highlighting the severity of the issue. The flaw manifests when the Bluetooth subsystem processes certain service discovery protocol requests without proper sanitization of input parameters, leading to potential information leakage from the system's memory space.
The technical exploitation of this vulnerability occurs through a specific Bluetooth protocol implementation flaw where the system fails to properly validate the length and structure of incoming service discovery requests. When an attacker crafts a malicious Bluetooth packet with malformed service discovery parameters, the vulnerable Android system processes this data without adequate bounds checking or input validation. This allows for memory content to be read beyond the intended buffer boundaries, potentially exposing sensitive information including kernel memory addresses, stack contents, or other confidential data stored in memory. The vulnerability is classified under CWE-125 as an out-of-bounds read, which is a common pattern in Bluetooth protocol implementations where insufficient validation leads to memory corruption or exposure. The flaw operates at the protocol level within the Bluetooth service discovery mechanism, making it particularly dangerous as it can be exploited remotely without requiring physical access to the device.
The operational impact of CVE-2017-0785 extends beyond simple information disclosure, as the leaked memory contents could contain sensitive data such as cryptographic keys, session tokens, or other confidential information that could be leveraged for further attacks. Attackers could potentially use this vulnerability to gather system information that would aid in crafting more sophisticated attacks against the device or network. The vulnerability affects all supported Android versions mentioned in the CVE description, indicating it was a widespread issue within the Bluetooth stack implementation that required immediate patching across the entire Android ecosystem. This type of vulnerability aligns with ATT&CK technique T1046 which involves discovering services on remote systems, and T1005 which involves data from local system. The impact is particularly concerning in enterprise environments where Bluetooth-enabled devices might be used to access sensitive corporate networks or systems, as the information disclosure could provide attackers with insights into system configurations and potential attack vectors.
Mitigation strategies for CVE-2017-0785 primarily involve applying the security patches released by Google as part of their regular security updates. The vulnerability was addressed through updates to the Android Bluetooth stack implementation that introduced proper bounds checking and input validation for service discovery requests. Organizations should ensure all Android devices are updated to the latest security patches, particularly those versions that received fixes for this specific vulnerability. Network administrators should also consider implementing additional security controls such as disabling Bluetooth when not in use, implementing Bluetooth access controls, and monitoring for unusual Bluetooth activity that might indicate exploitation attempts. The patching process for this vulnerability should be prioritized at the highest level given its potential for remote exploitation and the sensitive data exposure it enables. Additionally, security teams should conduct vulnerability assessments to identify any devices that may not have received the necessary updates, particularly in environments where legacy Android devices might still be in use.