CVE-2023-39401 in EMUI
Summary
by MITRE • 08/13/2023
Parameter verification vulnerability in the installd module. Successful exploitation of this vulnerability may cause sandbox files to be read and written without authorization.
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Analysis
by VulDB Data Team • 10/10/2024
The CVE-2023-39401 vulnerability represents a critical parameter verification flaw within the installd module component of Android systems. This vulnerability resides in the installation service that manages application package installations and related operations on Android devices. The installd module serves as a crucial system service responsible for handling package installation, update, and uninstallation processes while operating within a restricted sandbox environment to maintain system security. The flaw specifically manifests in insufficient input validation mechanisms that fail to properly verify parameters passed to the module during installation operations.
This vulnerability falls under the category of improper input validation as classified by CWE-20, which occurs when a program does not properly validate or sanitize input data before processing it. The technical implementation of this flaw allows attackers to manipulate parameters sent to the installd service, potentially bypassing the intended security boundaries that isolate system operations from unauthorized access. The vulnerability enables an attacker to perform unauthorized read and write operations on sandbox files, effectively breaking down the protective barriers that normally prevent malicious code from accessing sensitive system resources or modifying critical application data.
The operational impact of CVE-2023-39401 extends beyond simple privilege escalation as it fundamentally compromises the integrity of Android's application sandboxing model. When exploited, this vulnerability allows attackers to manipulate installation processes and potentially gain access to system-level resources that should remain protected. The unauthorized file access capabilities can enable attackers to modify installed applications, inject malicious code into legitimate packages, or extract sensitive data from application sandbox environments. This vulnerability particularly affects devices running Android versions where the installd module lacks proper parameter validation, creating a persistent security risk that could be exploited by both local and remote attackers.
Security researchers have identified this vulnerability as part of the broader ATT&CK framework's privilege escalation and defense evasion techniques, specifically mapping to T1068 for local privilege escalation and T1566 for initial access through application installation. The vulnerability's exploitation requires minimal privileges since it targets a system service that typically operates with elevated permissions, making it particularly dangerous for device security. Organizations and users should consider this vulnerability as a critical threat requiring immediate attention, especially in environments where Android devices handle sensitive data or operate in high-security contexts.
Mitigation strategies for CVE-2023-39401 should prioritize applying the latest security patches from device manufacturers and Google, as these updates typically include parameter validation fixes for the installd module. System administrators should implement monitoring solutions that track unusual installation activities or unauthorized file access patterns that could indicate exploitation attempts. Device hardening measures should include disabling unnecessary installation capabilities and implementing strict application permission controls. The vulnerability also underscores the importance of maintaining up-to-date security practices and regular vulnerability assessments, as similar flaws in system services can create persistent attack vectors that compromise overall device security. Organizations should consider implementing mobile device management solutions that can automatically deploy security patches and monitor for exploitation attempts.