SPL Command Safeguards Bypass via the ‘display.page.search.patterns.sensitivity’ Search Parameter in Splunk Enterprise
Advisory ID: SVD-2023-0205
CVE ID: CVE-2023-22935
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-228738
Description
In Splunk Enterprise versions below 8.1.13, 8.2.10, and 9.0.4, the ‘display.page.search.patterns.sensitivity’ search parameter 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
The vulnerability affects instances with Splunk Web enabled; disabling Splunk Web is a possible workaround. 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 on possible bypassing of SPL safeguards by using the ‘display.page.search.patterns.sensitivity’ search parameter on Splunk versions below 8.1.13, 8.2.10, and 9.0.4.
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
Anton (therceman)