CVE-2019-10778
📋 TL;DR
CVE-2019-10778 is a command injection vulnerability in devcert-sanscache that allows attackers to execute arbitrary system commands. The vulnerability occurs because user-controlled input is passed directly to the exec() function without sanitization. This affects applications using vulnerable versions of the devcert-sanscache npm package.
💻 Affected Systems
- devcert-sanscache
📦 What is this software?
Devcert Sanscache by Devcert Sanscache Project
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with remote code execution, allowing attackers to install malware, exfiltrate data, or pivot to other systems.
Likely Case
Remote command execution leading to data theft, service disruption, or installation of cryptocurrency miners.
If Mitigated
Limited impact with proper input validation and command sanitization in place.
🎯 Exploit Status
Exploitation is straightforward as it involves injecting shell commands through the commonName parameter.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.4.7 and later
Vendor Advisory: https://snyk.io/vuln/SNYK-JS-DEVCERTSANSCACHE-540926
Restart Required: Yes
Instructions:
1. Update devcert-sanscache to version 0.4.7 or higher using npm update devcert-sanscache. 2. Restart the application. 3. Verify the fix by checking the package version.
🔧 Temporary Workarounds
Input Validation
allImplement strict input validation for the commonName parameter to prevent command injection.
Implement regex validation: /^[a-zA-Z0-9.-]+$/ for domain names
Use Alternative Package
allReplace devcert-sanscache with a more secure certificate generation library.
npm uninstall devcert-sanscache
npm install alternative-cert-package
🧯 If You Can't Patch
- Implement network segmentation to isolate vulnerable systems
- Deploy application firewalls with command injection detection rules
🔍 How to Verify
Check if Vulnerable:
Check package.json or run npm list devcert-sanscache to see if version is below 0.4.7Check Version:
npm list devcert-sanscache | grep devcert-sanscacheVerify Fix Applied:
Verify npm list devcert-sanscache shows version 0.4.7 or higher📡 Detection & Monitoring
Log Indicators:
- Unusual process execution from Node.js applications
- Suspicious command strings in application logs
Network Indicators:
- Unexpected outbound connections from application servers
- Command and control traffic patterns
SIEM Query:
process.name:cmd.exe AND parent.name:node.exe OR process.name:bash AND parent.name:node.exe