CVE-2023-39389 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 • 10/10/2024
The vulnerability identified as CVE-2023-39389 represents a critical input validation weakness within the PMS module of a software system. This flaw stems from insufficient verification of input parameters, creating an avenue for malicious actors to manipulate system behavior through crafted data inputs. The vulnerability falls under the category of improper input validation, which is commonly associated with CWE-20 - Improper Input Validation, a fundamental weakness that has been consistently ranked among the top software security risks. The PMS module, typically responsible for managing personal management systems or similar functionalities, fails to adequately sanitize or validate user-provided data before processing, potentially allowing attackers to inject malicious payloads or manipulate system operations.
The technical exploitation of this vulnerability occurs when an attacker submits carefully crafted input parameters that bypass the intended validation checks within the PMS module. These malformed inputs can trigger unexpected behavior within the system, ultimately leading to the degradation or complete unavailability of the home screen interface. The attack vector likely involves the submission of malformed data through API endpoints, form fields, or direct input mechanisms that the PMS module processes without proper sanitization. This type of vulnerability aligns with ATT&CK technique T1210 - Exploitation of Remote Services, as it involves leveraging an unvalidated input parameter to gain unauthorized control over system functionality. The lack of strict input verification creates a pathway for attackers to potentially execute arbitrary code or manipulate system state in ways that were not intended by the original software design.
The operational impact of CVE-2023-39389 extends beyond simple functionality disruption, as the unavailability of the home screen represents a critical user experience degradation that can affect system usability and potentially lead to broader service interruptions. When the home screen becomes unavailable, users lose access to primary navigation and system controls, effectively rendering portions of the application unusable. This vulnerability can be particularly damaging in enterprise environments where the PMS module may be integral to business operations, as it could lead to productivity loss and require significant recovery efforts. The attack surface is further expanded when considering that input validation flaws often serve as entry points for more sophisticated attacks, potentially enabling privilege escalation or data exfiltration. The vulnerability's impact is exacerbated by the fact that input validation errors are typically difficult to detect through automated testing alone, making them particularly dangerous in production environments.
Mitigation strategies for CVE-2023-39389 should focus on implementing robust input validation mechanisms throughout the PMS module. Organizations must enforce strict parameter validation using allowlists of acceptable input values, implement proper data sanitization routines, and establish comprehensive input filtering at all system boundaries. The solution involves deploying input validation libraries, implementing proper encoding mechanisms, and ensuring that all user-provided data undergoes rigorous verification before processing. Security teams should also consider implementing web application firewalls to detect and block malicious input patterns, as well as establishing monitoring protocols to identify anomalous behavior that might indicate exploitation attempts. Additionally, regular code reviews and security testing should be conducted to identify similar validation weaknesses throughout the application codebase. The remediation process must include thorough testing of input validation mechanisms to ensure that legitimate user inputs continue to function properly while malicious inputs are properly rejected. This vulnerability serves as a reminder of the critical importance of defensive programming practices and the need for continuous security assessment to prevent such fundamental flaws from compromising system integrity and availability.