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
CVSSv3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
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
| Product | Version | Component | Affected Version | Fix Version |
|---|---|---|---|---|
| Splunk Enterprise | 8.1 | Splunk Web | 8.1.12 and lower | 8.1.13 |
| Splunk Enterprise | 8.2 | Splunk Web | 8.2.0 to 8.2.9 | 8.2.10 |
| Splunk Enterprise | 9.0 | Splunk Web | 9.0.0 to 9.0.3 | 9.0.4 |
| Splunk Cloud Platform | - | Splunk Web | 9.0.2209 and lower | 9.0.2209.3 |
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