CVE-2020-7635
📋 TL;DR
CVE-2020-7635 is a command injection vulnerability in compass-compile npm package that allows attackers to execute arbitrary commands on the host system by manipulating the options argument. This affects any application using vulnerable versions of compass-compile, particularly Node.js applications that process untrusted input through this library.
💻 Affected Systems
- compass-compile
📦 What is this software?
Compass Compile by Compass Compile Project
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with remote code execution, data exfiltration, lateral movement, and persistent backdoor installation.
Likely Case
Arbitrary command execution within the application's context, potentially leading to data theft, service disruption, or further exploitation.
If Mitigated
Limited impact due to proper input validation, sandboxing, or network segmentation preventing command execution.
🎯 Exploit Status
Simple command injection via options argument; public PoC available in vulnerability reports.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None - package appears abandoned
Vendor Advisory: https://github.com/quaertym/compass-compile
Restart Required: Yes
Instructions:
1. Remove compass-compile from package.json. 2. Run 'npm uninstall compass-compile'. 3. Find alternative library. 4. Restart affected applications.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation and sanitization for all options passed to compass-compile functions.
// JavaScript example: Validate options before passing to compass-compile
function sanitizeOptions(options) {
// Remove or escape shell metacharacters
return options.replace(/[;&|`$()\n]/g, '');
}
Sandbox Execution
allRun compass-compile in a sandboxed environment with limited permissions.
// Use Node.js child_process with restricted environment
const { exec } = require('child_process');
exec('compass-command', {
env: { PATH: '/usr/bin' },
shell: false
});
🧯 If You Can't Patch
- Implement strict network segmentation to isolate systems using compass-compile
- Deploy application-level firewalls to monitor and block suspicious command execution patterns
🔍 How to Verify
Check if Vulnerable:
Check package.json or node_modules for compass-compile version 0.0.1 or earlier: npm list compass-compileCheck Version:
npm list compass-compile | grep compass-compileVerify Fix Applied:
Confirm compass-compile is removed from package.json and node_modules directory📡 Detection & Monitoring
Log Indicators:
- Unusual child process spawns from Node.js applications
- Commands with shell metacharacters in application logs
- Unexpected system command execution patterns
Network Indicators:
- Outbound connections from Node.js processes to unexpected destinations
- Command and control traffic patterns
SIEM Query:
process.name:node AND (process.args:*;* OR process.args:*&* OR process.args:*|* OR process.args:*`*)