CVE-2024-43383 in Lucene.Net.Replicator
Summary
by MITRE • 10/31/2024
Deserialization of Untrusted Data vulnerability in Apache Lucene.Net.Replicator.
This issue affects Apache Lucene.NET's Replicator library: from 4.8.0-beta00005 through 4.8.0-beta00016.
An attacker that can intercept traffic between a replication client and server, or control the target replication node URL, can provide a specially-crafted JSON response that is deserialized as an attacker-provided exception type. This can result in remote code execution or other potential unauthorized access.
Users are recommended to upgrade to version 4.8.0-beta00017, which fixes the issue.
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Analysis
by VulDB Data Team • 10/31/2024
The vulnerability CVE-2024-43383 represents a critical deserialization flaw in Apache Lucene.Net.Replicator library that exposes systems to remote code execution risks. This issue specifically impacts versions ranging from 4.8.0-beta00005 through 4.8.0-beta00016, creating a significant security gap in distributed search and indexing operations. The vulnerability stems from insufficient input validation during the deserialization process of untrusted data, allowing malicious actors to manipulate replication communications and potentially execute arbitrary code on affected systems.
The technical flaw manifests when the Replicator library processes JSON responses from replication nodes without proper sanitization of object types during deserialization. This creates an attack surface where an adversary can craft malicious JSON payloads containing specially constructed exception types that will be executed upon deserialization. The vulnerability operates at the core of Lucene's replication mechanism, where data synchronization between master and slave nodes occurs, making it particularly dangerous in distributed environments where multiple nodes communicate through network protocols. According to CWE-502, this vulnerability maps directly to "Deserialization of Untrusted Data" which is classified as a high-risk category due to its potential for remote code execution and privilege escalation.
The operational impact of this vulnerability extends beyond simple data compromise, as successful exploitation can lead to complete system compromise and unauthorized access to sensitive information. Attackers leveraging this vulnerability can intercept network traffic between replication clients and servers or manipulate target replication node URLs to inject malicious payloads. The attack vector requires network interception capabilities or the ability to control replication node endpoints, making it particularly concerning in environments where replication communications are not properly secured. Organizations using Lucene.Net replication features are at risk of having their indexing systems compromised, potentially leading to data breaches, service disruption, and unauthorized access to search indexes containing sensitive information.
Mitigation strategies should prioritize immediate upgrade to version 4.8.0-beta00017 which contains the necessary patches to address the deserialization vulnerability. Network segmentation and traffic monitoring should be implemented to detect unusual replication communications that might indicate exploitation attempts. Security professionals should also consider implementing additional layers of protection such as network access controls, encrypted replication channels, and regular security audits of replication configurations. The fix addresses the root cause by implementing proper input validation and type checking during deserialization processes, aligning with ATT&CK technique T1210 for exploiting weaknesses in remote services and preventing malicious code execution through controlled input handling. Organizations should conduct thorough vulnerability assessments to ensure all affected systems are properly updated and monitor for any signs of exploitation attempts in their network traffic logs.