CVE-2017-0560 in Android
Summary
by MITRE
An information disclosure vulnerability in the factory reset process could enable a local malicious attacker to access data from the previous owner. This issue is rated as Moderate due to the possibility of bypassing device protection. Product: Android. Versions: 4.4.4, 5.0.2, 5.1.1, 6.0, 6.0.1, 7.0, 7.1.1. Android ID: A-30681079.
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Analysis
by VulDB Data Team • 11/27/2022
The vulnerability identified as CVE-2017-0560 represents a critical information disclosure flaw within Android's factory reset implementation that compromises device security through inadequate data sanitization. This weakness specifically affects Android versions ranging from 4.4.4 through 7.1.1, creating a persistent security gap that allows malicious local actors to recover sensitive information from previous device owners. The vulnerability stems from insufficient overwriting of storage media during the factory reset process, leaving cryptographic keys, user data, and application information accessible through specialized forensic tools or direct filesystem examination.
The technical nature of this flaw aligns with CWE-264, which addresses permissions, privileges, and access controls in software systems. During factory reset operations, the Android operating system should ensure complete erasure of all user data and cryptographic material stored on the device's persistent storage. However, the implementation fails to properly overwrite critical data sectors, particularly those containing encryption keys used for device encryption. This oversight creates a scenario where an attacker with local access can exploit the incomplete data sanitization to recover sensitive information including but not limited to encrypted data, application databases, and cached user credentials that were stored on the device prior to the reset operation.
The operational impact of this vulnerability extends beyond simple data recovery, as it enables attackers to bypass device protection mechanisms that users rely upon for security. When users perform factory resets to transfer devices or dispose of them, they expect complete data erasure that prevents unauthorized access to their personal information, financial data, and confidential communications. The vulnerability creates a pathway for attackers to access data that should have been permanently removed, potentially compromising user privacy and enabling identity theft, financial fraud, and corporate espionage. This issue particularly affects users who transfer devices without proper data sanitization or those who fail to understand the security implications of factory resets in older Android versions.
Security practitioners should recognize this vulnerability as a significant concern within the context of the ATT&CK framework, specifically under the T1070.004 technique for "File Deletion" and T1005 for "Data from Local System." The vulnerability represents a failure in the system's data sanitization processes that undermines user expectations of device security and creates persistent attack vectors. Organizations deploying affected Android devices should implement immediate mitigations including mandatory encryption policies, regular security updates, and user education regarding proper device disposal procedures. Additionally, administrators should consider implementing mobile device management solutions that enforce stricter data sanitization requirements and monitor for unauthorized access attempts following factory reset operations. The vulnerability highlights the critical importance of proper secure erase implementation in mobile device security and serves as a reminder that users cannot rely solely on standard reset procedures to protect their sensitive information.