In Splunk Enterprise versions below 9.3.1, 9.2.3, and 9.1.6, the software potentially exposes sensitive HTTP parameters to the _internal index. This exposure could happen if you configure the Splunk Enterprise REST_Calls log channel at the DEBUG logging level.
Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Splunk | Splunk | 9.1.0 (including) | 9.1.6 (excluding) |
| Splunk | Splunk | 9.2.0 (including) | 9.2.3 (excluding) |
| Splunk | Splunk | 9.3.0 (including) | 9.3.0 (including) |
While logging all information may be helpful during development stages, it is important that logging levels be set appropriately before a product ships so that sensitive user data and system information are not accidentally exposed to potential attackers. Different log files may be produced and stored for: