CVE-2024-23078 Overview
A Null Pointer Dereference vulnerability has been reported in JGraphT Core v1.5.2, specifically within the org.jgrapht.alg.util.ToleranceDoubleComparator::compare(Double, Double) component. When triggered, this vulnerability can result in a NullPointerException that may lead to application crashes or denial of service conditions.
Critical Impact
This vulnerability is disputed by multiple third parties who question the evidence supporting its classification as a security vulnerability. The original submission may have been based on automated tooling that lacks sufficient robustness for accurate vulnerability identification.
Affected Products
- JGraphT Core v1.5.2
Discovery Timeline
- 2024-04-08 - CVE CVE-2024-23078 published to NVD
- 2024-11-21 - Last updated in NVD database
Technical Details for CVE-2024-23078
Vulnerability Analysis
The reported vulnerability exists in the ToleranceDoubleComparator class within the JGraphT graph theory library. The compare(Double, Double) method is designed to compare two Double values with a specified tolerance threshold, commonly used in algorithms requiring floating-point comparison with acceptable error margins.
When null values are passed to this comparison method, the code fails to properly validate the input parameters before performing operations on them. This results in a NullPointerException being thrown at runtime. In Java applications, unhandled NullPointerExceptions can cause thread termination, service disruption, or complete application crashes depending on the exception handling architecture in place.
It is important to note that this CVE is disputed. Multiple third parties have challenged the validity of this vulnerability report, suggesting that the evidence presented does not conclusively demonstrate a security vulnerability. The original submission appears to have been generated by automated analysis tooling that may not adequately distinguish between programming bugs and exploitable security vulnerabilities.
Root Cause
The root cause is classified as CWE-476 (NULL Pointer Dereference). The ToleranceDoubleComparator::compare method does not implement null-safety checks before dereferencing the Double object parameters. When either parameter is null, the JVM throws a NullPointerException upon attempting to access object methods or properties.
Attack Vector
The attack vector is network-based, meaning a remote attacker could potentially supply crafted input that results in null values being passed to the vulnerable comparison method. Exploitation would require the attacker to influence the data being processed by graph algorithms using the ToleranceDoubleComparator. This could occur in applications that accept external graph data or algorithm parameters over network interfaces.
However, successful exploitation depends heavily on how the JGraphT library is integrated into the target application and whether user-controlled input can reach the vulnerable code path. Applications that properly validate input before passing data to JGraphT methods may not be affected.
Detection Methods for CVE-2024-23078
Indicators of Compromise
- Unexpected application crashes or service restarts with NullPointerException stack traces referencing org.jgrapht.alg.util.ToleranceDoubleComparator
- Elevated frequency of Java exceptions in application logs correlating with external data processing
- Denial of service patterns where specific inputs consistently cause service unavailability
Detection Strategies
- Monitor application logs for NullPointerException entries originating from the org.jgrapht.alg.util package
- Implement application performance monitoring to detect abnormal crash rates in services using JGraphT
- Deploy static code analysis tools to identify usage of ToleranceDoubleComparator with potentially null input sources
Monitoring Recommendations
- Configure alerting for repeated application restarts or thread terminations in JGraphT-dependent services
- Implement centralized log aggregation to correlate NullPointerException events across distributed systems
- Monitor service availability metrics for graph processing endpoints
How to Mitigate CVE-2024-23078
Immediate Actions Required
- Review application code to identify all usages of ToleranceDoubleComparator and verify input validation is in place
- Implement null checks before passing values to the compare(Double, Double) method
- Consider wrapping JGraphT calls in try-catch blocks to gracefully handle potential NullPointerExceptions
- Evaluate whether this disputed CVE represents an actual risk in your specific deployment context
Patch Information
No official patch or vendor advisory is currently available for this vulnerability. The JGraphT project can be monitored for updates via the GitHub JGraphT Repository. Given the disputed nature of this CVE, users should evaluate their own risk exposure and consider implementing application-level mitigations.
Workarounds
- Add explicit null validation before invoking the ToleranceDoubleComparator::compare method
- Implement defensive programming practices by wrapping comparator usage in null-safe utility methods
- Consider using alternative comparison implementations that include built-in null handling
# Example Maven dependency check for vulnerable version
mvn dependency:tree | grep jgrapht-core
# If version 1.5.2 is found, evaluate upgrade options or implement application-level mitigations
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
