CVE-2017-0702 in Android
Summary
by MITRE
A remote code execution vulnerability in the Android system ui. Product: Android. Versions: 7.1.1, 7.1.2. Android ID: A-36621442.
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Analysis
by VulDB Data Team • 12/31/2020
The vulnerability identified as CVE-2017-0702 represents a critical remote code execution flaw within the Android system user interface component affecting versions 7.1.1 and 7.1.2. This vulnerability resides in the systemui module which handles the display and interaction of system-level user interface elements such as status bars, notifications, and quick settings panels. The flaw enables malicious actors to execute arbitrary code on affected devices without requiring physical access or user interaction, making it particularly dangerous in mobile environments where devices are frequently exposed to untrusted networks and applications. The vulnerability stems from improper input validation within the systemui service that processes user interactions and system events, creating an exploitable condition that can be triggered remotely through specially crafted network requests or malicious applications.
The technical exploitation of this vulnerability occurs through a buffer overflow condition within the systemui component's handling of specific input parameters. When the system processes certain user interface events or notification data, the vulnerable code fails to properly validate the size and content of incoming data structures, allowing attackers to overflow memory buffers and potentially overwrite critical execution pointers or code segments. This memory corruption vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and can be leveraged to execute arbitrary code with the privileges of the systemui process. The attack surface is particularly concerning because the systemui service runs with elevated privileges and has access to sensitive system resources and APIs that can be abused to gain broader system control.
The operational impact of CVE-2017-0702 extends beyond simple remote code execution, as it can enable attackers to establish persistent access to affected devices and potentially escalate privileges to full system administrator levels. Once exploited, the vulnerability can allow adversaries to install malicious applications, access sensitive user data, monitor communications, and potentially compromise the entire device security posture. The vulnerability's remote nature means that attackers can exploit it from anywhere in the world, making it particularly attractive for large-scale attacks against Android users. According to ATT&CK framework techniques, this vulnerability maps to T1059 for command and scripting interpreter usage and T1068 for exploit for privilege escalation, as the initial code execution can be leveraged to gain higher privileges within the Android operating system.
Mitigation strategies for this vulnerability should prioritize immediate patch deployment through official Android security updates, as Google released security patches for this flaw in their regular update cycles. Organizations and users must ensure that devices are updated to Android 7.1.3 or later versions that contain the necessary fixes for this vulnerability. Network-level protections such as firewalls and intrusion detection systems can provide additional layers of defense, though they may not prevent exploitation of this specific vulnerability. Security researchers recommend implementing application whitelisting policies and monitoring for suspicious systemui process behavior that could indicate exploitation attempts. The vulnerability also highlights the importance of secure coding practices and input validation within system-level components, as similar flaws can occur in other Android services and components that handle untrusted data from external sources, making this a critical lesson for Android application developers and security teams.