CVE-2024-23676 Explained : Impact and Mitigation

This CVE-2024-23676 was published on January 22, 2024, by Splunk. It involves a vulnerability in Splunk Enterprise versions below 9.0.8 and 9.1.3, allowing low-privileged users to view metrics on an index that they do not have permission to access. The exploit necessitates user interaction from a high-privileged user.

Understanding CVE-2024-23676

This vulnerability, titled "Sensitive Information Disclosure of Index Metrics through 'mrollup' SPL Command," poses a security risk to affected Splunk Enterprise and Splunk Cloud versions.

What is CVE-2024-23676?

The vulnerability in Splunk versions below 9.0.8 and 9.1.3 enables low-privileged users to access metrics on an index they lack permission to view. Exploiting this vulnerability requires the involvement of a high-privileged user.

The Impact of CVE-2024-23676

The impact of this vulnerability is rated as MEDIUM according to CVSS:3.1. It could potentially lead to sensitive information disclosure by allowing unauthorized access to index metrics.

Technical Details of CVE-2024-23676

The following technical details provide insight into the vulnerability:

Vulnerability Description

The 'mrollup' SPL command in Splunk versions below 9.0.8 and 9.1.3 allows low-privileged users to view metrics on an index without proper permissions, facilitated by user interaction from a high-privileged user.

Affected Systems and Versions

Splunk Enterprise: Versions below 9.0.8 and 9.1.3
Splunk Cloud: All versions with less than 9.1.2308.200

Exploitation Mechanism

Exploiting this vulnerability requires a low-privileged user to leverage the 'mrollup' SPL command to access metrics on an index that they do not have authorization to view.

Mitigation and Prevention

To address CVE-2024-23676 and enhance system security, take the following steps:

Immediate Steps to Take

Update affected systems to versions 9.0.8 and 9.1.3 for Splunk Enterprise, and 9.1.2308.200 or higher for Splunk Cloud.
Implement stringent access control measures to restrict unauthorized access to sensitive index metrics.

Long-Term Security Practices

Regularly monitor and audit user permissions to ensure the principle of least privilege is maintained.
Educate users on secure practices and the importance of not sharing credentials with unauthorized individuals.

Patching and Updates

Adhere to Splunk's security advisories and promptly apply patches and updates to mitigate vulnerabilities like CVE-2024-23676. Regularly monitor for new security advisories and implement patches in a timely manner.