CVE-2017-0605 in Android
Summary
by MITRE
An elevation of privilege vulnerability in the kernel trace subsystem could enable a local malicious application to execute arbitrary code within the context of the kernel. This issue is rated as Critical due to the possibility of a local permanent device compromise, which may require reflashing the operating system to repair the device. Product: Android. Versions: Kernel-3.10, Kernel-3.18. Android ID: A-35399704. References: QC-CR#1048480.
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Analysis
by VulDB Data Team • 12/23/2020
The vulnerability identified as CVE-2017-0605 represents a critical elevation of privilege flaw within the Android kernel trace subsystem that fundamentally undermines system security. This weakness exists in kernel versions 3.10 and 3.18, affecting the core operating system functionality that governs how kernel-level tracing operations are handled. The vulnerability stems from inadequate input validation and improper access controls within the trace subsystem, creating a pathway for malicious local applications to escalate their privileges and execute code with kernel-level permissions. Such a flaw is particularly dangerous because it operates entirely within the kernel space where all system operations are governed, making it a prime target for attackers seeking persistent system control.
The technical exploitation of this vulnerability involves leveraging weaknesses in the kernel trace functionality to gain unauthorized access to privileged execution contexts. The flaw allows a local malicious application to manipulate kernel trace mechanisms in ways that bypass normal security boundaries, effectively enabling code execution with the highest system privileges. This particular vulnerability falls under the CWE-264 category of "Permissions, Privileges, and Access Controls" and aligns with ATT&CK technique T1068 which covers "Exploitation for Privilege Escalation." The kernel trace subsystem typically handles debugging and performance monitoring operations, but the improper implementation creates opportunities for attackers to inject malicious code that executes with kernel privileges.
The operational impact of CVE-2017-0605 extends far beyond simple privilege escalation, as it can lead to complete system compromise with potential for permanent device damage. Once exploited, the vulnerability allows attackers to modify core system components, install persistent backdoors, and potentially render devices inoperable without complete system reinstallation. The severity rating as Critical reflects the possibility that successful exploitation could result in complete device compromise requiring full operating system reflash. This represents a significant threat to Android devices since kernel-level access provides attackers with unlimited control over all system resources and data. The vulnerability's potential for causing permanent device damage makes it particularly concerning for both consumer and enterprise environments where device integrity is paramount.
Mitigation strategies for CVE-2017-0605 should focus on immediate patching and system hardening measures. Android security updates addressing this vulnerability were released as part of the regular security patches, and users should ensure their devices receive the latest security updates from their manufacturers. System administrators should implement monitoring solutions that can detect anomalous kernel trace activity and privilege escalation attempts. The vulnerability highlights the importance of kernel security hardening techniques including proper input validation, access control enforcement, and regular security audits of kernel subsystems. Additionally, implementing security measures such as kernel address space layout randomization and control flow integrity can help prevent exploitation of similar vulnerabilities. Organizations should also consider deploying endpoint protection solutions that can detect and prevent malicious applications from attempting to exploit such kernel-level weaknesses.