CVE-2023-46230: Sensitive Information Disclosure in Splunk Add-on Builder Versions Below 4.1.4

A recent vulnerability, identified as CVE-2023-46230, has been discovered in the Splunk Add-on Builder affecting versions below 4.1.4. This vulnerability allows sensitive information to be written to internal log files, potentially exposing critical data to unauthorized users and systems. In this article, we will explore the details of this vulnerability, its exploitability, and the steps needed to mitigate it.

Vulnerability Details

Splunk, a popular platform for log collection and analysis, released the Add-on Builder to help users create and customize their Add-ons. However, versions of the Add-on Builder below 4.1.4 have a flaw that exposes sensitive information by writing it to internal log files. This sensitive data may include user credentials, API keys, and other critical information that can be accessed by an attacker.

The vulnerability arises due to a lack of proper sanitization and handling of sensitive data when logging errors and events in the application. The insecure logging of sensitive data allows an attacker with access to the log files to potentially compromise the affected system or use the gathered data in further attacks.

The affected code snippet in the Add-on Builder has been identified as follows

# Vulnerable code in Add-on Builder
log("API request: " + apiRequest)
log("API response: " + apiResponse)

As evident from the code snippet, the Add-on Builder logs both the API request and the API response without any sanitization. This means that sensitive information such as credentials or API keys contained in these requests and responses are also logged and hence, exposed.

Exploit Details

To exploit CVE-2023-46230, an attacker needs to gain access to the log files containing the sensitive information. An attacker can leverage various techniques, such as directory traversal, to access these files without proper authorization. Once they have access to the log files, they can extract sensitive data, and potentially compromise the system or carry out further attacks.

Mitigation

To mitigate CVE-2023-46230, users are advised to update their Splunk Add-on Builder to version 4.1.4 or later, as this fixes the vulnerability at the root. Users can download the latest Add-on Builder from the official Splunk website:

- Splunk Add-on Builder - Download

In addition to updating the Add-on Builder, organizations should ensure proper access controls and file permissions are implemented to prevent unauthorized access to sensitive log files.

Conclusion

CVE-2023-46230 is a critical vulnerability affecting Splunk Add-on Builder versions below 4.1.4, exposing sensitive information to internal log files. Organizations using Splunk Add-on Builder should update to the latest version and implement proper access controls to mitigate potential security risks associated with this vulnerability.

Timeline

Published on: 01/30/2024 17:15:09 UTC
Last modified on: 02/05/2024 21:00:21 UTC