Persistent Cross-site Scripting (XSS) in Web Bulletin
Advisory ID: SVD-2024-0713
CVE ID: CVE-2024-36993
Published: 2024-07-01
Last Update: 2024-07-01
CVSSv3.1 Score: 5.4, Medium
CVSSv3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CWE: CWE-79
Bug ID: VULN-15649
Description
In Splunk Enterprise versions below 9.2.2, 9.1.5, and 9.0.10 and Splunk Cloud Platform versions below 9.1.2312.200 and 9.1.2308.207, a low-privileged user that does not hold the “admin” or “power” Splunk roles could craft a malicious payload through a Splunk Web Bulletin Messages that could result in execution of unauthorized JavaScript code in the browser of a user.
Splunk Web Bulletin Messages would not sanitize the “data-toggle” and “data-remote” attributes which could lead to a Stored Cross-site Scripting (XSS) exploit.
Solution
Upgrade Splunk Enterprise to versions 9.2.2, 9.1.5, and 9.0.10, or higher.
Splunk is performing upgrades on Splunk Cloud Platform instances as part of Routine Maintenance for customers, as described in the Splunk Cloud Platform Maintenance Policy. In the meantime, Splunk is actively monitoring for potential issues that could arise from this vulnerability.
Product Status
| Product | Version | Component | Affected Version | Fix Version |
|---|---|---|---|---|
| Splunk Enterprise | 9.2 | Splunk Web | 9.2.0 to 9.2.1 | 9.2.2 |
| Splunk Enterprise | 9.1 | Splunk Web | 9.1.0 to 9.1.4 | 9.1.5 |
| Splunk Enterprise | 9.0 | Splunk Web | 9.0.0 to 9.0.9 | 9.0.10 |
| Splunk Cloud Platform | 9.1.2312 | Splunk Web | Below 9.1.2312.200 | 9.1.2312.200 |
| Splunk Cloud Platform | 9.1.2308 | Splunk Web | Below 9.1.2308.207 | 9.1.2308.207 |
Mitigations and Workarounds
The vulnerability affects instances with Splunk Web enabled, turning Splunk Web off 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
Severity
Splunk rates this vulnerability as 5.4, Medium, with a CVSSv3.1 vector of CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
If the Splunk Enterprise instance does not run Splunk Web, there should be no impact and the severity would be informational.
Acknowledgments
Anton (therceman)