CVE-2025-56571
📋 TL;DR
Finance.js v4.1.0 contains a Denial of Service vulnerability in its IRR function where improper handling of the depth parameter can cause excessive CPU consumption. This allows attackers to crash or stall applications using this library by providing malicious input. Any application using Finance.js v4.1.0 for financial calculations is affected.
💻 Affected Systems
- Finance.js
📦 What is this software?
Finance.js by Ebradyjobory
⚠️ Risk & Real-World Impact
Worst Case
Complete application unavailability due to CPU exhaustion, potentially affecting all users and disrupting financial operations.
Likely Case
Application performance degradation or temporary unavailability for users accessing the vulnerable IRR function.
If Mitigated
Minimal impact with proper input validation and resource limits in place.
🎯 Exploit Status
Simple HTTP request with malicious parameter can trigger the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v4.1.1 or later
Vendor Advisory: https://github.com/ebradyjobory/finance.js
Restart Required: Yes
Instructions:
1. Update Finance.js to v4.1.1 or later using npm update finance.js. 2. Restart your application. 3. Verify the update was successful.
🔧 Temporary Workarounds
Input Validation
allImplement server-side validation to limit depth parameter values
// Validate depth parameter before passing to IRR function
if (depth > 1000) { throw new Error('Depth too high'); }
Resource Limiting
linuxImplement CPU usage limits for the application process
// Use process resource limits in Node.js
process.setrlimit(process.RLIMIT_CPU, { soft: 5, hard: 10 });
🧯 If You Can't Patch
- Implement WAF rules to block requests with suspicious depth parameter values
- Monitor CPU usage and implement automatic restart thresholds for the application
🔍 How to Verify
Check if Vulnerable:
Check package.json for finance.js version 4.1.0Check Version:
npm list finance.jsVerify Fix Applied:
Verify finance.js version is 4.1.1 or later in package.json📡 Detection & Monitoring
Log Indicators:
- High CPU usage spikes
- Application crash logs
- Requests with unusually high depth parameter values
Network Indicators:
- HTTP requests to IRR endpoints with large depth parameters
- Increased response times for financial calculation endpoints
SIEM Query:
source="application.logs" AND ("IRR" OR "depth") AND (cpu_usage>90 OR status="500")