CVE-2024-22949
📋 TL;DR
CVE-2024-22949 is a disputed vulnerability in JFreeChart v1.5.4 where a NullPointerException occurs in the CategoryLineAnnotation component, potentially causing denial of service. The vulnerability is disputed by third parties who question the evidence. Applications using JFreeChart for chart generation are affected.
💻 Affected Systems
- JFreeChart
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Application crash leading to denial of service for chart rendering functionality
Likely Case
Application instability or crashes when processing specific chart annotations
If Mitigated
Minimal impact with proper error handling and input validation
🎯 Exploit Status
No known exploits; requires specific chart configuration to trigger NullPointerException
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available - vulnerability disputed
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available due to dispute. Consider updating to latest JFreeChart version if concerned.
🔧 Temporary Workarounds
Implement error handling
allAdd try-catch blocks around CategoryLineAnnotation usage to handle NullPointerException
// Java code: try { chart.addAnnotation(annotation); } catch (NullPointerException e) { // Handle exception }
Input validation
allValidate all inputs to CategoryLineAnnotation constructors before use
// Java code: if (value1 != null && value2 != null) { new CategoryLineAnnotation(...); }
🧯 If You Can't Patch
- Implement robust error handling around chart generation code
- Monitor application logs for NullPointerException in chart components
🔍 How to Verify
Check if Vulnerable:
Check if application uses JFreeChart v1.5.4 and creates CategoryLineAnnotation objectsCheck Version:
Check Maven/Gradle dependencies or JFreeChart.getVersion() methodVerify Fix Applied:
Test chart generation with various CategoryLineAnnotation configurations📡 Detection & Monitoring
Log Indicators:
- NullPointerException in org.jfree.chart.annotations.CategoryLineAnnotation
Network Indicators:
- None - local library vulnerability
SIEM Query:
source="application_logs" AND "NullPointerException" AND "CategoryLineAnnotation"