CVE-2024-52046: Apache Mina RCE Vulnerability

CVE-2024-52046 Overview

CVE-2024-52046 is a critical insecure deserialization vulnerability in Apache MINA, a network application framework. The ObjectSerializationDecoder component uses Java's native deserialization protocol to process incoming serialized data but lacks the necessary security checks and defenses. This vulnerability allows attackers to exploit the deserialization process by sending specially crafted malicious serialized data, potentially leading to remote code execution (RCE) attacks.

Critical Impact

This vulnerability enables unauthenticated remote code execution through malicious serialized payloads sent over the network. With no user interaction required and maximum impact on confidentiality, integrity, and availability, attackers can achieve complete system compromise on affected MINA deployments.

Affected Products

• Apache MINA core versions 2.0.X (prior to 2.0.27)
• Apache MINA core versions 2.1.X (prior to 2.1.10)
• Apache MINA core versions 2.2.X (prior to 2.2.4)

Discovery Timeline

• December 25, 2024 - CVE-2024-52046 published to NVD
• February 12, 2025 - Last updated in NVD database

Technical Details for CVE-2024-52046

Vulnerability Analysis

This insecure deserialization vulnerability (CWE-502) exists in Apache MINA's ObjectSerializationDecoder class. The core issue is that the decoder processes incoming serialized Java objects without implementing proper class filtering or validation mechanisms. Java deserialization vulnerabilities are particularly dangerous because the deserialization process can trigger arbitrary code execution before the application even has a chance to validate the received object.

An application using the MINA core library is affected if the IoBuffer#getObject() method is called. This method is potentially invoked when adding a ProtocolCodecFilter instance using the ObjectSerializationCodecFactory class in the filter chain. The lack of class whitelisting means any serializable class available on the classpath can be instantiated during deserialization.

It's important to note that the FtpServer, SSHd, and Vysper sub-projects are not affected by this issue.

Root Cause

The root cause is the absence of security controls in the ObjectSerializationDecoder that would restrict which classes can be deserialized. Without explicit class filtering, attackers can craft serialized payloads containing gadget chains from common libraries (such as Apache Commons Collections, Spring Framework, or other dependencies) that execute arbitrary code during the deserialization process.

Attack Vector

The attack vector is network-based and requires no authentication or user interaction. An attacker can send a specially crafted serialized Java object to any network endpoint using the vulnerable MINA ObjectSerializationCodecFactory. When the malicious payload is deserialized by the ObjectSerializationDecoder, the embedded gadget chain executes attacker-controlled code with the privileges of the application.

The exploitation flow typically involves:

1. Identifying a MINA-based service accepting serialized objects
2. Crafting a malicious serialized payload using known deserialization gadget chains
3. Sending the payload to the target service
4. Achieving remote code execution when the payload is deserialized

Detection Methods for CVE-2024-52046

Indicators of Compromise

• Unusual network traffic containing serialized Java objects (magic bytes AC ED 00 05 or Base64-encoded equivalents)
• Unexpected child processes spawned from Java applications using MINA
• Suspicious outbound network connections from MINA-based services
• Application crashes or exceptions related to deserialization errors during attack attempts

Detection Strategies

• Monitor for Java serialization magic bytes (AC ED 00 05) in network traffic to MINA-based services
• Implement network intrusion detection signatures for known Java deserialization exploit payloads
• Analyze application dependencies to identify usage of ObjectSerializationCodecFactory or ObjectSerializationDecoder classes
• Deploy runtime application self-protection (RASP) solutions to detect deserialization attacks

Monitoring Recommendations

• Enable verbose logging for MINA codec operations to capture deserialization events
• Monitor system processes for suspicious child process creation from Java applications
• Set up alerts for unusual network connections originating from MINA-based services
• Implement file integrity monitoring on application directories to detect post-exploitation modifications

How to Mitigate CVE-2024-52046

Immediate Actions Required

• Upgrade Apache MINA core library to version 2.0.27, 2.1.10, or 2.2.4 depending on your version branch
• After upgrading, explicitly configure allowed classes using the new accept() methods on ObjectSerializationDecoder
• Audit your codebase for usage of IoBuffer#getObject(), ProtocolCodecFilter, and ObjectSerializationCodecFactory
• Consider implementing network segmentation to limit exposure of MINA-based services

Patch Information

Apache has released patched versions that include class filtering capabilities:

• Version 2.0.27 for the 2.0.X branch
• Version 2.1.10 for the 2.1.X branch
• Version 2.2.4 for the 2.2.X branch

Important: Upgrading alone is not sufficient. After upgrading, you must explicitly configure which classes the decoder will accept using one of the three new methods: accept(ClassNameMatcher classNameMatcher), accept(Pattern pattern), or accept(String... patterns). By default, the patched decoder will reject all classes present in incoming data.

For additional information, see the Apache Mailing List Discussion, Openwall OSS-Security Post, and NetApp Security Advisory.

Workarounds

• If you cannot upgrade immediately, remove or disable the use of ObjectSerializationCodecFactory in your filter chain
• Replace Java native serialization with safer alternatives such as JSON or Protocol Buffers
• Implement network-level filtering to restrict access to MINA-based services from untrusted networks
• Deploy a web application firewall (WAF) or network IDS with Java deserialization attack signatures

# Configuration example - After upgrading, configure class filtering
# In your MINA application initialization code, add explicit class acceptance:
# 
# ObjectSerializationDecoder decoder = new ObjectSerializationDecoder();
# decoder.accept("com.yourcompany.model.*");  // Only allow your trusted classes
# decoder.accept(Pattern.compile("com\\.trusted\\..*"));
#
# Verify MINA version after upgrade:
mvn dependency:tree | grep mina-core
# Expected output should show 2.0.27, 2.1.10, or 2.2.4 or later