SPL Command Safeguards Bypass via the ‘map’ SPL Command in Splunk Enterprise

Advisory ID: SVD-2023-0209

CVE ID: CVE-2023-22939

Published: 2023-02-14

Last Update: 2023-02-14

CVSSv3.1 Score: 8.1, High

CWE: CWE-20

Bug ID: SPL-230588

Description

In Splunk Enterprise versions below 8.1.13, 8.2.10, and 9.0.4, the ‘map’ search processing language (SPL) command lets a search bypass SPL safeguards for risky commands. The vulnerability requires a higher privileged user to initiate a request within their browser and only affects instances with Splunk Web enabled.

Solution

For Splunk Enterprise, upgrade versions to 8.1.13, 8.2.10, 9.0.4, or higher.

For Splunk Cloud Platform, Splunk is actively patching and monitoring the Splunk Cloud instances.

Product Status

ProductVersionComponentAffected VersionFix Version
Splunk Enterprise8.1Splunk Web8.1.12 and lower8.1.13
Splunk Enterprise8.2Splunk Web8.2.0 to 8.2.98.2.10
Splunk Enterprise9.0Splunk Web9.0.0 to 9.0.39.0.4
Splunk Cloud Platform-Splunk Web9.0.2209 and lower9.0.2209.3

Mitigations and Workarounds

If users do not log in to Splunk Web on indexers in a distributed environment, disable Splunk Web on those indexers. See Disable unnecessary Splunk Enterprise components and the web.conf configuration specification file for more information on disabling Splunk Web.

Detections

This hunting search provides information about potential abuse of the ‘map’ SPL command.

Severity

Splunk rated the vulnerability as High, 8.1, with a CVSSv3.1 vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.

If the Splunk Enterprise instance does not run Splunk Web, there is no impact and the severity is Informational.

Acknowledgments

Klevis Luli, Splunk