A serious security vulnerability, identified as CVE-2023-49109, has been discovered in Apache DolphinScheduler. This vulnerability exposes the system to potential Remote Code Execution (RCE) attacks, enabling assailants to attain unauthorized access and run malicious code on affected systems. The developers behind Apache DolphinScheduler have provided a fix for this issue in their latest release, version 3.2.1. In this article, we will delve into the details of this vulnerability, the affected versions, and the exploit.
Affected Versions
The identified vulnerability is present in Apache DolphinScheduler releases prior to version 3.2.1. Users running versions of DolphinScheduler older than 3.2.1 can potentially be exposed to RCE attacks.
Exploit Details
The vulnerability results from insufficient validation of user-supplied data in a specific API endpoint within DolphinScheduler. This security flaw enables attackers to inject and execute malicious code remotely on the affected systems, potentially jeopardizing the confidentiality, integrity, and availability of crucial data and system assets. Below is a breakdown of the exploit process:
1. An attacker sends a specially crafted HTTP request payload to the vulnerable DolphinScheduler API endpoint.
2. The vulnerable API endpoint fails to adequately validate the supplied payload, leading to the injection of malicious code.
3. The malicious code is executed within the context of the affected system, permitting the attacker to compromise its security.
Here is a code snippet simply illustrating how a malicious payload could be constructed and sent to the vulnerable API endpoint:
~~~~
import requests
Replace the following values with your DolphinScheduler instance's information
target_url = "http:///api/"
headers = {
"Content-Type": "application/json",
"Authorization": "Bearer"
}
Craft the malicious payload
malicious_payload = {
"injection": "$()"
}
}
Sending the malicious payload to the vulnerable endpoint
response = requests.post(target_url, json=malicious_payload, headers=headers)
print(response.json())
~~~~
The above code snippet is a Python example demonstrating how an attacker could exploit the vulnerable API endpoint in DolphinScheduler. Keep in mind that this is for educational purposes and should not be utilized for malicious activities.
Mitigation Steps
Users running vulnerable versions of Apache DolphinScheduler should immediately take the following actions:
1. Upgrade to Apache DolphinScheduler version 3.2.1 or later. The latest version can be downloaded from the DolphinScheduler GitHub repository: https://github.com/apache/dolphinscheduler/releases/tag/3.2.1
2. Ensure proper input validation and sanitization are in place at the application level to prevent potential code injections and other attacks.
3. As best practice, maintain regular and separate periodic backups of your system data, allowing you to restore compromised systems from a clean starting point.
Original References
The following links can be used to gain a more comprehensive understanding of the CVE-2023-49109 vulnerability and the mitigation steps:
1. Apache DolphinScheduler GitHub Repository: https://github.com/apache/dolphinscheduler
2. Apache DolphinScheduler Release Notes (3.2.1): https://github.com/apache/dolphinscheduler/releases/tag/3.2.1
3. CVE Details: https://nvd.nist.gov/vuln/detail/CVE-2023-49109
Conclusion
The exposure of Remote Code Execution vulnerability (CVE-2023-49109) in Apache DolphinScheduler is critically important to address. Users of DolphinScheduler should immediately upgrade their installations to version 3.2.1 and implement the recommended mitigation steps to protect their systems from exploitation and compromise.
Timeline
Published on: 02/20/2024 10:15:07 UTC
Last modified on: 02/20/2024 19:50:53 UTC