LoFP / the vulnerability requires an authenticated session and access to create an investigation. it only affects the availability of the investigations manager, but without the manager, the investigations functionality becomes unusable for most users. this search gives the exact offending event.

Techniques

• T1499

Sample rules

Splunk ES DoS Investigations Manager via Investigation Creation

• source: splunk
• technicques:
  • T1499

Description

In Splunk Enterprise Security (ES) versions lower than 7.1.2, an attacker can create a malformed Investigation to perform a denial of service (DoS). The malformed investigation prevents the generation and rendering of the Investigations manager until it is deleted.

Detection logic

`splunkd_investigation_rest_handler` method=put msg=*investigation* status=error 
| stats count min(_time) as firstTime max(_time) as lastTime by user host method msg 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `splunk_es_dos_investigations_manager_via_investigation_creation_filter`