Improper Input Validation through Protocol-Relative URL in Classic Dashboards in Splunk Enterprise
In Splunk Enterprise versions below 10.2.4, 10.0.7, 9.4.12, and 9.3.13, and Splunk Cloud Platform versions below 10.3.2512.13, 10.2.2510.15, 10.1.2507.23, and 9.3.2411.132, a low-privileged user that does not hold the 'admin' or 'power' Splunk roles could cause data exfiltration through classic dashboards by redirecting a victim to an external site using a protocol-relative URL in a drill-down link.<br><br>The vulnerability exists because the URL classifier in classic dashboards only recognizes `http://` and `https://` schemes when checking for external URLs. Protocol-relative URLs such as `//attacker.com` bypass this check entirely, and Splunk Web does not show the external-navigation warning dialog to the victim.
Problem Types
| Type | CWE ID | Description |
|---|
| cwe | CWE-20 | The product does not validate or incorrectly validates input that can affect the control flow or data flow of a program. |
Type: cwe
Description: The product does not validate or incorrectly validates input that can affect the control flow or data flow of a program.
Metrics
| Version | Base score | Base severity | Vector |
|---|
| 3.1 | 5.7 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N |
Version: 3.1
Base score: 5.7
Base severity: MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N