CVE-2024-41172
📋 TL;DR
This memory leak vulnerability in Apache CXF HTTP client conduit prevents proper garbage collection of HTTPClient instances, causing continuous memory consumption increase. Affected systems running Apache CXF versions 3.6.0-3.6.3 or 4.0.0-4.0.4 may eventually experience out-of-memory conditions and application crashes.
💻 Affected Systems
- Apache CXF
📦 What is this software?
Cxf by Apache
Cxf by Apache
⚠️ Risk & Real-World Impact
Worst Case
Application crashes due to out-of-memory errors, leading to denial of service and potential data loss or corruption.
Likely Case
Gradual memory consumption increase over time, eventually causing application instability or crashes requiring restarts.
If Mitigated
Memory usage patterns show normal behavior with proper garbage collection, no application instability.
🎯 Exploit Status
This is a memory leak issue that occurs during normal operation, not requiring external exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.6.4 or 4.0.5
Vendor Advisory: https://lists.apache.org/thread/n2hvbrgwpdtcqdccod8by28ynnolybl6
Restart Required: Yes
Instructions:
1. Identify Apache CXF version in use. 2. Upgrade to CXF 3.6.4 if using 3.6.x series. 3. Upgrade to CXF 4.0.5 if using 4.0.x series. 4. Restart the application after upgrade.
🔧 Temporary Workarounds
Application restart scheduling
allSchedule regular application restarts to clear accumulated memory before reaching critical levels.
Memory monitoring and alerting
allImplement memory usage monitoring with alerts when consumption reaches warning thresholds.
🧯 If You Can't Patch
- Implement aggressive memory monitoring with automated alerts at 70% and 90% utilization thresholds
- Reduce HTTP client usage frequency or implement connection pooling with explicit cleanup
🔍 How to Verify
Check if Vulnerable:
Check Apache CXF version in application dependencies or classpath. Vulnerable if version is 3.6.0-3.6.3 or 4.0.0-4.0.4.Check Version:
Check Maven/Gradle dependencies or examine CXF JAR manifest: `java -jar cxf-*.jar --version` or check MANIFEST.MFVerify Fix Applied:
Verify upgraded to CXF 3.6.4 or 4.0.5, then monitor memory usage patterns for stabilization.📡 Detection & Monitoring
Log Indicators:
- OutOfMemoryError exceptions
- Increasing memory usage in GC logs
- Application crash/restart logs
Network Indicators:
- Service unavailability patterns
- Increased response times correlating with memory usage
SIEM Query:
source="application.logs" AND ("OutOfMemoryError" OR "java.lang.OutOfMemoryError") AND "CXF"