Jenkins Arbitrary File Read CVE-2024-23897

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Description

The following analtyic identifies a Jenkins Arbitrary File Read CVE-2024-23897 exploitation. This attack allows an attacker to read arbitrary files on the Jenkins server. This can be used to obtain sensitive information such as credentials, private keys, and other sensitive information.

• Type: TTP
• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Web
• Last Updated: 2024-01-26
• 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

ID	Summary	CVSS
CVE-2024-23897	Jenkins 2.441 and earlier, LTS 2.426.2 and earlier does not disable a feature of its CLI command parser that replaces an '@' character followed by a file path in an argument with the file's contents, allowing unauthenticated attackers to read arbitrary files on the Jenkins controller file system.	None

Search

| 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:

• security_content_ctime

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

• Jenkins Server Vulnerabilities

RBA

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

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://github.com/projectdiscovery/nuclei-templates/pull/9025
• https://github.com/jenkinsci-cert/SECURITY-3314-3315
• https://github.com/binganao/CVE-2024-23897
• https://github.com/h4x0r-dz/CVE-2024-23897
• https://www.sonarsource.com/blog/excessive-expansion-uncovering-critical-security-vulnerabilities-in-jenkins/
• https://www.shodan.io/search?query=product%3A%22Jenkins%22
• https://thehackernews.com/2024/01/critical-jenkins-vulnerability-exposes.html

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

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