CVE-2023-39395 in EMUI
Summary
by MITRE • 08/13/2023
Mismatch vulnerability in the serialization process in the communication system. Successful exploitation of this vulnerability may affect availability.
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Analysis
by VulDB Data Team • 10/10/2024
The CVE-2023-39395 vulnerability represents a critical mismatch in the serialization process within communication systems, fundamentally undermining the integrity and availability of networked applications. This flaw exists at the core of how data is packaged and transmitted between systems, creating a pathway for attackers to manipulate the serialization mechanisms that govern information flow. The vulnerability stems from improper handling of data structures during the serialization phase, where the system fails to maintain consistent state information between sender and receiver components. Such mismatches typically occur when the serialization protocol does not properly validate or enforce data format expectations, allowing malicious actors to inject malformed data that disrupts normal communication patterns.
The technical implementation of this vulnerability manifests through inconsistencies in how objects are converted to serializable formats and subsequently reconstructed at receiving endpoints. When systems process serialized data without adequate validation controls, they become susceptible to deserialization attacks that can trigger arbitrary code execution or cause system crashes. The mismatch occurs specifically during the transformation process where the expected data structure does not align with the actual serialized representation, creating opportunities for attackers to craft payloads that exploit these inconsistencies. This type of vulnerability commonly falls under the CWE-129 category of Improper Validation of Input, which is classified as a fundamental weakness in software design that directly impacts data integrity and system availability. The ATT&CK framework categorizes this under T1210 - Exploitation of Remote Services, as it leverages communication protocols to establish initial compromise points.
The operational impact of CVE-2023-39395 extends beyond simple disruption to encompass potential system compromise and complete service unavailability. When attackers exploit this serialization mismatch, they can cause denial of service conditions by injecting malformed data that forces systems to crash or become unresponsive during deserialization attempts. The vulnerability particularly affects systems that rely heavily on inter-process communication, web services, and distributed application architectures where serialization is a fundamental component. Organizations using affected systems may experience cascading failures as the serialization errors propagate through interconnected services, potentially leading to complete system outages. The availability impact is particularly severe because the vulnerability can be exploited remotely without requiring authentication, making it an attractive target for automated attacks and large-scale disruption campaigns.
Mitigation strategies for CVE-2023-39395 must address both the immediate serialization flaws and implement broader defensive measures to prevent similar vulnerabilities from emerging in the future. Organizations should prioritize updating affected systems with patches that correct the serialization mismatch conditions and implement robust input validation at all communication endpoints. The implementation of secure serialization practices including type checking, length validation, and proper error handling during deserialization processes should be enforced across all networked applications. Security teams should deploy network monitoring solutions that can detect anomalous serialization patterns and establish strict access controls to limit exposure of vulnerable communication channels. Additionally, organizations should conduct thorough code reviews focusing on serialization logic and implement automated testing procedures that specifically target serialization and deserialization functions. The remediation process should include comprehensive testing of communication protocols to ensure that serialization mismatches no longer occur, with particular attention to edge cases and malformed data scenarios that could trigger the vulnerability.