CVE-2024-22371 is a vulnerability in Apache Camel that allows an attacker to expose sensitive data by crafting a malicious EventFactory and providing a custom ExchangeCreatedEvent that exposes sensitive data. This vulnerability affects Apache Camel from version 3.21.X through 3.21.3, from 3.22.X through 3.22., from 4..X through 4..3, and from 4.X through 4.3.. Users are recommended to upgrade to version 3.21.4, 3.22.1, 4..4, or 4.4., which contains the fix for this issue.

In this post, we will discuss the details of this vulnerability, explain the steps to reproduce it, and provide links to the patches that address it. We will also share a code snippet that demonstrates the exploitation of this vulnerability.

Vulnerability Details

Apache Camel is a widely-used Java-based integration framework that enables developers to integrate various systems using multiple protocols and data formats. One of the components of Apache Camel is the EventFactory class, which is responsible for creating various event objects related to message exchanges and other activities.

In vulnerable versions of Apache Camel, an attacker can craft a malicious EventFactory that provides a custom ExchangeCreatedEvent with sensitive data embedded in its properties or headers. When the custom ExchangeCreatedEvent is processed by the system, the sensitive data can be exposed to unauthorized parties, potentially leading to data leaks or other security implications.

Imagine a simple Camel route which listens for incoming messages and logs them

from("activemq:queue:incoming")
  .log("Received message: ${body}");

An attacker with access to EventFactory can craft a custom ExchangeCreatedEvent with sensitive data embedded in its properties, as shown below:

public class MaliciousEventFactory extends DefaultEventFactory {

  @Override
  public ExchangeCreatedEvent createExchangeCreatedEvent(final Exchange exchange) {
    exchange.getIn().setHeader("X-Sensitive-Data", "secret123");
    return super.createExchangeCreatedEvent(exchange);
  }

}

When the malicious EventFactory is installed, the custom ExchangeCreatedEvent can cause the sensitive data to be exposed as a log message:

[INFO] Received message: Hello World! [X-Sensitive-Data=secret123]

1. CVE-2024-22371 - Vulnerability Details: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-22371
2. Apache Camel Security Advisory: https://camel.apache.org/security-advisories.data/CVE-2024-22371.txt.asc
3. Apache Camel GitHub Repository (Patches): https://github.com/apache/camel

Mitigation Steps

The recommended mitigation for this vulnerability is to upgrade to Apache Camel version 3.21.4, 3.22.1, 4..4, or 4.4., as these versions contain the patch for this issue. You may also want to review your system configuration to ensure that custom EventFactory implementations are not installed from untrusted sources.

Conclusion

CVE-2024-22371 in Apache Camel highlights the importance of proper handling of user-defined components and secure coding practices. By upgrading to the latest version of Apache Camel and keeping a close eye on the system configurations, developers can prevent the exposure of sensitive data through malicious EventFactory implementations.

Timeline

Published on: 02/26/2024 16:27:56 UTC
Last modified on: 02/26/2024 16:32:25 UTC