CVE-2021-37939 : Exploit Details and Defense Strategies

Kibana, a product by Elastic, has been found to have a security vulnerability that allows malicious users to retrieve HTTP response data from internal hosts using specific connectors. This could expose sensitive information intentionally hidden from public access.

Understanding CVE-2021-37939

This CVE affects Kibana versions from 7.8.0 through 7.15.1 and involves the JIRA connector & IBM Resilient connector compromising the confidentiality of HTTP response data.

What is CVE-2021-37939?

The vulnerability in Kibana exposes internal host HTTP response data via specific connectors, potentially revealing restricted information.

The Impact of CVE-2021-37939

Malicious users can exploit this vulnerability to access limited HTTP response data on hosts accessible to the cluster, compromising data confidentiality.

Technical Details of CVE-2021-37939

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The flaw enables unauthorized individuals to extract HTTP response data from internal hosts using Kibana connectors, breaching data confidentiality.

Affected Systems and Versions

Kibana versions between 7.8.0 and 7.15.1 are vulnerable to this issue.

Exploitation Mechanism

Malicious users with connector creation capabilities can leverage the JIRA & IBM Resilient connectors to retrieve restricted HTTP response data.

Mitigation and Prevention

Learn how to protect your systems from CVE-2021-37939.

Immediate Steps to Take

Ensure your Kibana instance is updated to the latest version to mitigate the vulnerability. Monitor access to internal host data.

Long-Term Security Practices

Implement robust security measures such as network segmentation and least privilege access to prevent unauthorized data retrieval.

Patching and Updates

Regularly apply security patches provided by Elastic to fix vulnerabilities and enhance system security.