CVE-2023-39388 in EMUI
Summary
by MITRE • 08/13/2023
Vulnerability of input parameters being not strictly verified in the PMS module. Successful exploitation of this vulnerability may cause home screen unavailability.
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Analysis
by VulDB Data Team • 09/08/2023
The vulnerability identified as CVE-2023-39388 resides within the PMS module where input parameters undergo insufficient validation processes. This weakness represents a classic example of inadequate input sanitization that falls under the broader category of weak input validation flaws. The vulnerability stems from the system's failure to rigorously verify and sanitize all incoming data parameters before processing them within the PMS framework, creating potential entry points for malicious actors to manipulate system behavior through crafted inputs.
The technical flaw manifests when the PMS module accepts user-provided parameters without implementing strict verification mechanisms. This allows attackers to submit malformed or unexpected data that can disrupt normal operational procedures within the system. The vulnerability operates at the application layer where parameter validation should occur, making it particularly dangerous as it can be exploited through various attack vectors including direct input manipulation or indirect injection techniques. The lack of proper parameter checking creates a pathway for attackers to potentially manipulate the system's internal state and compromise core functionalities.
The operational impact of this vulnerability extends beyond simple functional degradation, as successful exploitation can result in complete home screen unavailability. This represents a significant service disruption that affects end-user experience and system accessibility. When the home screen becomes unavailable, users lose access to the primary interface of the application, effectively rendering the system unusable for its intended purpose. The vulnerability's potential to cause widespread service interruption makes it particularly concerning for production environments where system availability is critical for business operations and user satisfaction.
From a cybersecurity perspective, this vulnerability aligns with CWE-20 which specifically addresses "Improper Input Validation" and can be categorized under ATT&CK technique T1210 - "Exploitation of Remote Services" when attackers leverage the weakness to disrupt service availability. The flaw demonstrates poor defensive programming practices where input validation should have been implemented as a fundamental security control. Organizations should implement comprehensive parameter validation mechanisms that include input sanitization, length checking, type validation, and proper error handling to prevent such vulnerabilities from being exploited.
Mitigation strategies should focus on implementing robust input validation at multiple levels within the PMS module. This includes deploying strict parameter checking mechanisms that validate data types, lengths, and formats before processing. The system should employ proper error handling to prevent information leakage that could aid attackers in understanding the vulnerability. Security controls should be enhanced through the implementation of web application firewalls, input sanitization libraries, and regular security testing procedures. Additionally, developers should follow secure coding practices that emphasize defensive programming and input validation as core components of application development lifecycle processes.