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Description

The following analytic identifies attempts to exploit Jenkins Arbitrary File Read CVE-2024-23897. It detects HTTP POST requests to Jenkins URLs containing "/cli?remoting=false" with a 200 status code. This activity is significant as it indicates potential unauthorized access to sensitive files on the Jenkins server, such as credentials and private keys. If confirmed malicious, this could lead to severe data breaches, unauthorized access, and further exploitation within the environment.

  • Type: TTP
  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
  • Datamodel: Web
  • Last Updated: 2024-05-24
  • Author: Michael Haag, Splunk
  • ID: c641260d-2b48-4eb1-b1e8-2cc5b8b99ab1

Annotations

ATT&CK

ATT&CK

ID Technique Tactic
T1190 Exploit Public-Facing Application Initial Access
Kill Chain Phase
  • Delivery
NIST
  • DE.CM
CIS20
  • CIS 13
CVE 


1
2
3
4
5
6



| tstats count min(_time) as firstTime max(_time) as lastTime from datamodel=Web where Web.url="*/cli?remoting=false*" Web.status=200 Web.http_method=POST by Web.src, Web.dest, Web.http_user_agent, Web.url Web.status, Web.http_method 
| `drop_dm_object_name("Web")` 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `jenkins_arbitrary_file_read_cve_2024_23897_filter`

Macros

The SPL above uses the following Macros:

:information_source: jenkins_arbitrary_file_read_cve-2024-23897_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.

  • Web.src
  • Web.dest
  • Web.http_user_agent
  • Web.url
  • Web.status
  • Web.http_method

How To Implement

This detection requires the Web datamodel to be populated from a supported Technology Add-On like Suricata, Splunk for Apache, Splunk for Nginx, or Splunk for Palo Alto. If unable to utilize the Web datamodel, modify query to your data source.

Known False Positives

False positives should be limited as this detection is based on a specific URL path and HTTP status code. Adjust the search as necessary to fit the environment.

Associated Analytic Story

RBA

Risk Score Impact Confidence Message
81.0 90 90 Jenkins Arbitrary File Read CVE-2024-23897 against $dest$ by $src$.

: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: 2