Missing Access Control and Incorrect Ownership of Data in App Key Value Store (KVStore) collections in the Splunk Secure Gateway App

Description

In Splunk Enterprise versions below 9.4.1, 9.3.3, 9.2.5, and 9.1.8, and versions below 3.8.38 and 3.7.23 of the Splunk Secure Gateway app on Splunk Cloud Platform, a low-privileged user that does not hold the “admin“ or “power“ Splunk roles could edit and delete other user data in App Key Value Store (KVStore) collections that the Splunk Secure Gateway app created. This is due to missing access control and incorrect ownership of the data in those KVStore collections.

In the affected versions, the nobody user owned the data in the KVStore collections. This meant that there was no specific owner assigned to the data in those collections.

Solution

Upgrade Splunk Enterprise to versions 9.4.1, 9.3.3, 9.2.5, 9.1.8, or higher.

Splunk is actively monitoring and patching Splunk Cloud Platform instances.

Product Status

Mitigations and Workarounds

Disable the Splunk Secure Gateway App. See Manage app and add-on objects.

Note: Splunk Mobile, Spacebridge, and Mission Control rely on functionality in the Splunk Secure Gateway app. If you do not use any of the apps, features, or functionality, as a potential mitigation, you may remove or disable the app.

Detections

None

Severity

Splunk rates this vulnerability a 4.3, Medium, with a CVSSv3.1 vector of CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

If you remove or disable the Splunk Secure Gateway app, there should be no impact and the severity would be informational.

Acknowledgments

Gabriel Nitu, Splunk

David Chen, Splunk