CVE-2014-3579
📋 TL;DR
This XXE vulnerability in Apache ActiveMQ Apollo allows remote message consumers to potentially read arbitrary files, perform server-side request forgery, or cause denial of service by sending specially crafted XML messages with XPath selectors. It affects all ActiveMQ Apollo 1.x installations before version 1.7.1 that process XML messages. The high CVSS score reflects the potential for complete system compromise.
💻 Affected Systems
- Apache ActiveMQ Apollo
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote unauthenticated attacker achieves remote code execution, reads sensitive files (including configuration files with credentials), performs SSRF attacks, or causes complete system compromise.
Likely Case
Attackers read arbitrary files from the server, potentially obtaining configuration files, credentials, or other sensitive data. SSRF attacks to internal services are also probable.
If Mitigated
With proper network segmentation and XML parsing restrictions, impact limited to denial of service or limited file disclosure.
🎯 Exploit Status
XXE vulnerabilities are well-understood with many public exploit examples. The specific XPath selector vector makes exploitation straightforward for attackers familiar with XXE.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.7.1
Vendor Advisory: http://activemq.apache.org/security-advisories.data/CVE-2014-3579-announcement.txt
Restart Required: Yes
Instructions:
1. Download ActiveMQ Apollo 1.7.1 or later from Apache website. 2. Stop the ActiveMQ Apollo service. 3. Backup configuration files. 4. Install the new version. 5. Restore configuration if needed. 6. Start the service.
🔧 Temporary Workarounds
Disable external entity processing
allConfigure XML parser to disable external entity resolution
Set XML parser properties: FEATURE_SECURE_PROCESSING=true, disallow-doctype-decl=true
Input validation filter
allImplement filter to reject XML messages containing DOCTYPE declarations or external entity references
🧯 If You Can't Patch
- Implement network segmentation to restrict access to ActiveMQ Apollo instances
- Deploy web application firewall with XXE protection rules
🔍 How to Verify
Check if Vulnerable:
Check ActiveMQ Apollo version: if version is 1.x and less than 1.7.1, system is vulnerable. Also check if XML message processing is enabled.Check Version:
Check Apollo version in logs or via management interface. For Linux: grep -i version /path/to/apollo/logs/*.logVerify Fix Applied:
Verify version is 1.7.1 or later. Test with XXE payloads to confirm they are rejected.📡 Detection & Monitoring
Log Indicators:
- XML parsing errors
- DOCTYPE declarations in message logs
- External entity resolution attempts
- Unusual file access patterns
Network Indicators:
- XML messages containing DOCTYPE or SYSTEM entities
- Outbound connections from ActiveMQ to unexpected destinations
SIEM Query:
source="activemq" AND (message="*DOCTYPE*" OR message="*ENTITY*" OR message="*SYSTEM*")🔗 References
- http://activemq.apache.org/security-advisories.data/CVE-2014-3579-announcement.txt
- http://seclists.org/oss-sec/2015/q1/428
- http://www.securityfocus.com/bid/72508
- https://exchange.xforce.ibmcloud.com/vulnerabilities/100721
- https://issues.apache.org/jira/browse/APLO-366
- https://lists.apache.org/thread.html/a859563f05fbe7c31916b3178c2697165bd9bbf5a65d1cf62aef27d2%40%3Ccommits.activemq.apache.org%3E
- http://activemq.apache.org/security-advisories.data/CVE-2014-3579-announcement.txt
- http://seclists.org/oss-sec/2015/q1/428
- http://www.securityfocus.com/bid/72508
- https://exchange.xforce.ibmcloud.com/vulnerabilities/100721
- https://issues.apache.org/jira/browse/APLO-366
- https://lists.apache.org/thread.html/a859563f05fbe7c31916b3178c2697165bd9bbf5a65d1cf62aef27d2%40%3Ccommits.activemq.apache.org%3E
