Splunk ES DoS Investigations Manager via Investigation Creation

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.

Type: TTP
Product: Splunk Enterprise Security
Last Updated: 2024-01-04
Author: Rod Soto, Eric McGinnis, Chase Franklin
ID: 7f6a07bd-82ef-46b8-8eba-802278abd00e

Annotations

ATT&CK

ID	Technique	Tactic
T1499	Endpoint Denial of Service	Impact

Kill Chain Phase

Actions On Objectives

NIST

DE.CM

CIS20

CIS 10

CVE

ID	Summary	CVSS
CVE-2024-22165	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.<br>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.	None

Search

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

Macros

The SPL above uses the following Macros:

splunk_es_dos_investigations_manager_via_investigation_creation_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.

method
msg
status
user

How To Implement

This search requires access to internal indexes. Only affects Splunk Enterprise Security versions lower than 7.1.2.

Known False Positives

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.

Associated Analytic Story

Splunk Vulnerabilities

RBA

Risk Score	Impact	Confidence	Message
100.0	100	100	Denial of Service Attack against Splunk ES Investigation Manager by $user$

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

https://advisory.splunk.com/advisories/SVD-2024-0102

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

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