Persistent Cross-Site Scripting through a Base64-encoded Image in a View in Splunk Enterprise
Advisory ID: SVD-2023-0202
CVE ID: CVE-2023-22932
Published: 2023-02-14
Last Update: 2023-02-14
CVSSv3.1 Score: 8.0, High
CVSSv3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
CWE: CWE-79
Bug ID: SPL-232819
Description
In Splunk Enterprise 9.0 versions before 9.0.4, a View allows for Cross-Site Scripting (XSS) through the error message in a Base64-encoded image. The vulnerability affects instances with Splunk Web enabled. It does not affect Splunk Enterprise versions below 9.0.
Solution
For Splunk Enterprise 9.0 versions, upgrade to 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 | - | Not affected | - |
| Splunk Enterprise | 8.2 | - | Not affected | - |
| 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 on users that might have potentially added a malicious payload through this vulnerability, and what users were exposed to the payload.
Severity
Splunk rated the vulnerability as High, 8.0, with a CVSSv3.1 vector of CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/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
Tim Coen (foobar7)