CVE-2025-23166
📋 TL;DR
This vulnerability in Node.js allows remote attackers to crash the runtime by triggering an uncaught exception in the SignTraits::DeriveBits() cryptographic method when processing untrusted inputs. Any Node.js application using cryptographic operations on user-supplied data is affected, particularly web servers and APIs handling authentication or encryption.
💻 Affected Systems
- Node.js
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete denial of service for Node.js applications, causing service disruption and potential data loss for in-memory operations.
Likely Case
Application crashes when processing malicious cryptographic inputs, leading to service downtime and requiring process restart.
If Mitigated
Limited impact with proper input validation and error handling wrappers around cryptographic operations.
🎯 Exploit Status
Exploitation requires sending specially crafted inputs to cryptographic functions, which are commonly exposed in web applications.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Latest Node.js versions from May 2025 security releases
Vendor Advisory: https://nodejs.org/en/blog/vulnerability/may-2025-security-releases
Restart Required: Yes
Instructions:
1. Check current Node.js version with 'node --version'. 2. Update to latest patched version using your package manager (npm, nvm, or system package manager). 3. Restart all Node.js applications and services.
🔧 Temporary Workarounds
Input validation wrapper
allWrap cryptographic function calls with input validation and try-catch blocks to prevent crashes
// Example: Wrap crypto operations in try-catch
const crypto = require('crypto');
function safeDeriveBits(input) {
try {
// Your crypto operation here
return result;
} catch (error) {
// Handle error gracefully
return null;
}
}
🧯 If You Can't Patch
- Implement rate limiting and input validation on all endpoints that process cryptographic operations
- Deploy application-level monitoring to detect and restart crashed Node.js processes automatically
🔍 How to Verify
Check if Vulnerable:
Check if Node.js version is older than May 2025 security releases using 'node --version'Check Version:
node --versionVerify Fix Applied:
Verify Node.js version is from May 2025 or later and test cryptographic operations with various inputs📡 Detection & Monitoring
Log Indicators:
- Node.js process crashes with uncaught exceptions
- Error logs containing 'ThrowException' or crypto-related stack traces
- Application restart patterns without normal shutdown
Network Indicators:
- Increased failed requests to cryptographic endpoints
- Unusual input patterns to crypto APIs
SIEM Query:
source="nodejs" AND ("uncaughtException" OR "process exit" OR "crypto" OR "SignTraits")