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Description

In Splunk Enterprise versions below 8.1.13, 8.2.10, and 9.0.4, a View allows for Cross-Site Scripting in an XML View through the 'layoutPanel' attribute in the 'module' tag. The vulnerability affects instances with Splunk Web enabled. This hunting search shows users action, application and role used for creating views related to this vulnerability.

  • Type: Hunting

  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud

  • Last Updated: 2023-02-07
  • Author: Rod Soto, Eric McGinnis, Splunk
  • ID: 9ac2bfea-a234-4a18-9d37-6d747e85c2e4

Annotations

ATT&CK

ATT&CK

ID Technique Tactic
T1189 Drive-by Compromise Initial Access
Kill Chain Phase
  • Delivery
NIST
  • DE.AE
CIS20
  • CIS 10
CVE
ID Summary CVSS
CVE-2023-22933 In Splunk Enterprise versions below 8.1.13, 8.2.10, and 9.0.4, a View allows for Cross-Site Scripting (XSS) in an extensible mark-up language (XML) View through the ‘layoutPanel’ attribute in the ‘module’ tag’. None 


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index = _internal sourcetype IN ("splunk_web_service", "splunk_python") message="*loadParams*" 
| `security_content_ctime(_time)` 
|  table _time message fileName 
| `splunk_xss_via_view_filter`

Macros

The SPL above uses the following Macros:

:information_source: splunk_xss_via_view_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.

Required fields

List of fields required to use this analytic.

  • message
  • fileName

How To Implement

This data is collected by default in Splunk. Upon first enabling this rule, a number of errors may be observed. Those that are due to improperly formatted, but non-nefarious, XML views should be be remedied in the corresponding view. Please take care investigating potential XSS as accessing an affected page could retrigger the exploit.

Known False Positives

The error detected above can be generated for a wide variety of improperly formatted XML views. There will be false positives as the search cannot extract the malicious payload and the view should be manually investigated.

Associated Analytic Story

RBA

Risk Score Impact Confidence Message
25.0 50 50 Potential stored XSS attempt via $fileName$

:information_source: The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.

Reference

Test Dataset

Replay any dataset to Splunk Enterprise by using our replay.py tool or the UI. Alternatively you can replay a dataset into a Splunk Attack Range

source | version: 1