CVE-2020-7604
📋 TL;DR
CVE-2020-7604 is a command injection vulnerability in the pulverizr npm package that allows attackers to execute arbitrary commands on the system. The vulnerability exists because user-controlled input is passed directly to exec() without sanitization. Any application using pulverizr versions through 0.7.0 is affected.
💻 Affected Systems
- pulverizr
📦 What is this software?
Pulverizr by Pulverizr Project
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining complete control over the server, allowing data theft, ransomware deployment, or use as a botnet node.
Likely Case
Remote code execution leading to data exfiltration, installation of backdoors, or lateral movement within the network.
If Mitigated
Limited impact with proper input validation and execution sandboxing in place.
🎯 Exploit Status
Exploitation requires attacker to create a file with malicious name that gets processed by pulverizr.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.7.1
Vendor Advisory: https://snyk.io/vuln/SNYK-JS-PULVERIZR-560122
Restart Required: Yes
Instructions:
1. Update pulverizr to version 0.7.1 or later using npm update pulverizr. 2. Restart any services using pulverizr. 3. Verify the update with npm list pulverizr.
🔧 Temporary Workarounds
Input Validation
allImplement strict input validation for filenames before passing to pulverizr.
Sandbox Execution
allRun pulverizr in a containerized or sandboxed environment with limited privileges.
🧯 If You Can't Patch
- Implement strict input validation to sanitize all user-controlled filenames before processing.
- Run the application in a container with minimal privileges and network access.
🔍 How to Verify
Check if Vulnerable:
Check package.json or run npm list pulverizr to see if version is 0.7.0 or earlier.Check Version:
npm list pulverizrVerify Fix Applied:
Confirm pulverizr version is 0.7.1 or later using npm list pulverizr.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns
- Processes spawned by pulverizr with unexpected arguments
Network Indicators:
- Outbound connections from pulverizr process to unexpected destinations
SIEM Query:
process.name:pulverizr AND (process.cmdline:*;* OR process.cmdline:*&* OR process.cmdline:*|*)