CVE-2024-39173
📋 TL;DR
calculator-boilerplate v1.0 contains a critical remote code execution vulnerability through improper use of the eval() function in calculator.js. Attackers can inject malicious payloads into input fields to execute arbitrary code on the server. Anyone running this vulnerable version is affected.
💻 Affected Systems
- calculator-boilerplate
⚠️ 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 system compromise allowing attackers to install malware, steal data, pivot to other systems, or establish persistent access.
Likely Case
Server takeover leading to data theft, cryptocurrency mining, or use as part of a botnet.
If Mitigated
Limited impact if isolated in container with minimal privileges and network restrictions.
🎯 Exploit Status
Simple payload injection via web interface; no authentication required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: Yes
Instructions:
1. Remove calculator-boilerplate v1.0 completely. 2. Replace with secure alternative or custom implementation. 3. Restart web server.
🔧 Temporary Workarounds
Input Sanitization
allReplace eval() with safe parsing functions and implement strict input validation
Replace eval() in calculator.js with safe alternatives like math.js or custom parser
Network Isolation
linuxRestrict access to vulnerable endpoint
iptables -A INPUT -p tcp --dport [PORT] -s [TRUSTED_IPS] -j ACCEPT
iptables -A INPUT -p tcp --dport [PORT] -j DROP
🧯 If You Can't Patch
- Immediately remove internet-facing access to the application
- Implement WAF rules to block eval() and suspicious payload patterns
🔍 How to Verify
Check if Vulnerable:
Check if calculator-boilerplate v1.0 is installed and if /routes/calculator.js contains eval() function calls with user input.Check Version:
Check package.json for version or examine file structure for v1.0 indicatorsVerify Fix Applied:
Confirm eval() is removed from calculator.js and replaced with safe parsing functions.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /calculator endpoint
- System commands in web server logs
- Process execution from web server user
Network Indicators:
- HTTP requests containing eval(), require(), or system() patterns
- Outbound connections from web server to unusual destinations
SIEM Query:
source="web_server" AND (url="/calculator" AND (payload="eval" OR payload="require" OR payload="system"))