At the time of this announcement, Splunk is not aware of any cases where this vulnerability has been actively exploited. Previous Product Security Announcements can be found on our Splunk Product Security Portal. Use SPL numbers when referencing issues in communication with Splunk. If there is no CVE Identifier listed with the vulnerability, it will be added once it is assigned by a CVE Numbering Authority. To standardize the calculation of severity scores for each vulnerability, when appropriate, Splunk uses Common Vulnerability Scoring System version 2.
Affected Products and Components
Security vulnerability addressed by this maintenance release affects the following version:
SPL-75668: Only affects Splunk Enterprise 6.0 components configured as data "receivers" on the listening or receiving port(s). This impacts Splunk Enterprise instances configured as indexers and any forwarders configured as intermediate forwarders.
Mitigation and Upgrades
To mitigate this issue, Splunk recommends upgrading to the latest release and applying as many of the Hardening Standards from the Securing Splunk documentation as are relevant to your environment. Splunk releases are cumulative, meaning that future releases will contain fixes to these vulnerabilities, new features and other bug fixes.
Splunk would like to thank and credit Vincent Kéravec EVRY ASA with the responsible disclosure of this issue.