ExploitPublished 9 May 2025

Apache ActiveMQ 6.1.6 · Denial of Service (DOS)

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Mentioned vulnerabilities

CVE-2025-27533

Severity

Medium

Rated by Threat Radar

Data as of 11 Jun 2025, 21:13 UTC

What to do

AI-suggested

1. Immediate mitigation should include network-level protections such as firewall rules to restrict access to the OpenWire port (default 61616) to trusted internal IP addresses only, blocking all unauthorized external traffic. 2. Deploy intrusion detection/prevention systems (IDS/IPS) with signatures or anomaly detection tuned to identify unusually large or malformed packets targeting ActiveMQ. 3. Implement rate limiting and connection throttling on the ActiveMQ server or network perimeter to limit the number of concurrent connections and packet sizes accepted. 4. Monitor ActiveMQ server logs and network traffic for signs of repeated connection attempts or large packet transmissions indicative of this exploit. 5. If possible, upgrade to a later, patched version of Apache ActiveMQ once available from the vendor. In the absence of an official patch, consider temporary disabling or isolating the OpenWire service if it is not critical. 6. Employ network segmentation to isolate messaging infrastructure from less trusted networks and reduce exposure. 7. Conduct regular backups and have incident response plans ready to restore service quickly in case of disruption. 8. Engage with Apache ActiveMQ community and security advisories to stay informed about patches or updates addressing this vulnerability. These measures go beyond generic advice by focusing on specific network controls, monitoring, and operational procedures tailored to the nature of this DoS attack.

Description

Apache ActiveMQ 6.1.6 - Denial of Service (DOS)

Impact

For European organizations relying on Apache ActiveMQ 6.1.6 for critical messaging infrastructure, this vulnerability poses a significant risk to service availability. Disruption of ActiveMQ can halt inter-application communication, impacting business processes, real-time data flows, and operational continuity. Industries such as finance, telecommunications, manufacturing, and public services that depend on message brokers for asynchronous communication could experience outages or degraded performance. The DoS attack can be launched remotely without authentication, increasing the attack surface and risk from external threat actors. Prolonged or repeated exploitation could lead to cascading failures in dependent systems, loss of productivity, and potential financial losses. Additionally, disruption of messaging services in critical infrastructure or government systems could have broader societal impacts. Although the vulnerability does not directly compromise confidentiality or integrity, the availability impact alone is critical for organizations with high uptime requirements. Given the lack of patches and the availability of exploit code, organizations face an urgent need to implement mitigations to prevent exploitation.

Indicators of compromise

Exploit source code

Exploit code for Apache ActiveMQ 6.1.6 - Denial of Service (DOS)10,904 characters

# Exploit Title: Apache ActiveMQ 6.1.6 - Denial of Service (DOS) 
# Date: 2025-05-9
# Exploit Author: [Abdualhadi khalifa (https://x.com/absholi7ly/)
# Github: https://github.com/absholi7ly/CVE-2025-27533-Exploit-for-Apache-ActiveMQ
# CVE: CVE-2025-27533

import socket
import struct
import time
import datetime
import threading
import requests
import argparse
import random
from colorama import init, Fore
from tabulate import tabulate
from tqdm import tqdm
from concurrent.futures import ThreadPool…

References

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