CVE-2018-16462
📋 TL;DR
This is a critical command injection vulnerability in the apex-publish-static-files npm module that allows attackers to execute arbitrary shell commands on affected systems. Any application using vulnerable versions of this module is affected, potentially leading to complete system compromise.
💻 Affected Systems
- apex-publish-static-files npm module
📦 What is this software?
Apex Publish Static Files by Apex Publish Static Files Project
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with root-level access, data exfiltration, lateral movement, and persistent backdoor installation.
Likely Case
Unauthorized command execution leading to data theft, service disruption, or cryptocurrency mining.
If Mitigated
Limited impact due to proper input validation and sandboxing, potentially only affecting isolated containers.
🎯 Exploit Status
Exploitation is straightforward through crafted arguments to the vulnerable function. Public HackerOne reports demonstrate working exploits.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.0.1
Vendor Advisory: https://www.npmjs.com/advisories/722
Restart Required: Yes
Instructions:
1. Update package.json to specify 'apex-publish-static-files': '>=2.0.1'. 2. Run 'npm update apex-publish-static-files'. 3. Restart all Node.js applications using this module.
🔧 Temporary Workarounds
Input Validation Wrapper
allWrap vulnerable function calls with strict input validation to prevent command injection
// Implement input validation before calling publishStaticFiles()
// Sanitize all user inputs and reject suspicious patterns
Module Removal
allRemove the vulnerable module if functionality is not essential
npm uninstall apex-publish-static-files
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected systems
- Deploy application-level firewalls to monitor and block suspicious command patterns
🔍 How to Verify
Check if Vulnerable:
Check package.json or package-lock.json for 'apex-publish-static-files' version < 2.0.1Check Version:
npm list apex-publish-static-files | grep apex-publish-static-filesVerify Fix Applied:
Verify installed version is >= 2.0.1 using 'npm list apex-publish-static-files'📡 Detection & Monitoring
Log Indicators:
- Unusual shell commands in application logs
- Suspicious child process spawns from Node.js
- Unexpected file system modifications
Network Indicators:
- Outbound connections to suspicious IPs from Node.js processes
- Unexpected DNS queries
SIEM Query:
process.name:node.exe AND (process.args:*cmd* OR process.args:*sh* OR process.args:*powershell*)