CVE-2023-44094 in HarmonyOS
Summary
by MITRE • 10/25/2023
Type confusion vulnerability in the distributed file module.Successful exploitation of this vulnerability may cause the device to restart.
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Analysis
by VulDB Data Team • 10/31/2023
This vulnerability represents a type confusion issue within the distributed file module of a network device or system, where improper handling of data types during file operations can lead to unpredictable behavior. The flaw occurs when the system fails to properly validate or distinguish between different data types during distributed file processing operations, creating opportunities for attackers to manipulate the system's internal state. Such type confusion vulnerabilities are particularly dangerous because they can lead to arbitrary code execution or system instability, as demonstrated by the potential for device restarts upon successful exploitation. The distributed file module typically handles file transfers, storage operations, and network-based file access patterns, making it a critical component for system functionality and security.
The technical implementation of this vulnerability stems from inadequate type checking mechanisms within the file processing pipeline. When the system receives or processes distributed file requests, it may incorrectly interpret data structures or memory locations, leading to situations where one data type is treated as another. This confusion can occur during file metadata processing, buffer allocation, or memory management operations within the distributed file subsystem. The vulnerability likely manifests when the system's type validation routines fail to properly verify input data characteristics before performing operations that assume specific data types. According to CWE classification, this vulnerability maps to CWE-129 which describes improper validation of array index or buffer bounds, though the specific type confusion aspect places it closer to CWE-128 which addresses improper handling of data types. The attack surface is particularly concerning as it involves network-accessible file operations that can be exploited remotely.
The operational impact of this vulnerability extends beyond simple device restarts to potentially enable more sophisticated attacks within the network infrastructure. When a device restarts due to this type confusion flaw, it can disrupt network services, create denial of service conditions, and provide attackers with opportunities to perform additional exploitation attempts. The restart behavior suggests that the system's error handling mechanism may not properly recover from the type confusion state, leading to a cascade of failures that ultimately result in system reboot. This characteristic makes the vulnerability particularly attractive to attackers seeking to establish persistent network disruption or to create conditions that facilitate further exploitation. From an attacker perspective, this vulnerability aligns with ATT&CK technique T1499.004 which covers network denial of service attacks, and potentially T1072 which addresses software deployment and execution within target environments.
Mitigation strategies should focus on strengthening type validation mechanisms within the distributed file module and implementing comprehensive input sanitization procedures. System administrators should prioritize applying vendor patches and updates immediately upon release, as these typically address the underlying type confusion issues through proper validation of data types and enhanced error handling. Network segmentation and access controls can help limit the potential impact of exploitation attempts by restricting unauthorized access to distributed file services. Additionally, implementing robust monitoring and logging of file operations can help detect anomalous behavior patterns that may indicate exploitation attempts. Regular security assessments of network infrastructure components should include thorough testing of distributed file functionality to identify similar type confusion vulnerabilities that may exist in other system modules. The vulnerability highlights the importance of proper software development practices including rigorous code review processes, static analysis tools, and comprehensive testing of data type handling mechanisms to prevent similar issues from occurring in future implementations.