CVE-2020-7752
📋 TL;DR
CVE-2020-7752 is a command injection vulnerability in the systeminformation npm package that allows attackers to execute arbitrary operating system commands by manipulating curl parameters. This affects any application using vulnerable versions of systeminformation, particularly Node.js applications that process untrusted input. The vulnerability enables attackers to overwrite JavaScript files and execute malicious commands on the host system.
💻 Affected Systems
- systeminformation npm package
📦 What is this software?
Systeminformation by Systeminformation
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attacker to execute arbitrary commands, install malware, exfiltrate data, or pivot to other systems in the network.
Likely Case
Remote code execution leading to data theft, service disruption, or cryptocurrency mining malware installation.
If Mitigated
Limited impact due to proper input validation, network segmentation, and least privilege execution contexts.
🎯 Exploit Status
Exploitation requires the application to process attacker-controlled input through vulnerable functions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.27.11
Vendor Advisory: https://github.com/sebhildebrandt/systeminformation/commit/931fecaec2c1a7dcc10457bb8cd552d08089da61
Restart Required: Yes
Instructions:
1. Update package.json to require systeminformation version 4.27.11 or higher. 2. Run 'npm update systeminformation'. 3. Restart all Node.js applications using the package.
🔧 Temporary Workarounds
Input Validation
allImplement strict input validation and sanitization for all parameters passed to systeminformation functions.
Network Restriction
allRestrict network access for applications using systeminformation to prevent external command execution.
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all user inputs
- Run applications with least privilege and in isolated containers
🔍 How to Verify
Check if Vulnerable:
Check package.json or run 'npm list systeminformation' to see if version is below 4.27.11.Check Version:
npm list systeminformation | grep systeminformationVerify Fix Applied:
Verify systeminformation version is 4.27.11 or higher using 'npm list systeminformation'.📡 Detection & Monitoring
Log Indicators:
- Unusual curl command executions
- Suspicious file modifications in application directories
- Unexpected process spawns from Node.js applications
Network Indicators:
- Outbound connections to suspicious domains from application servers
- Unusual command and control traffic patterns
SIEM Query:
process.name:node AND (process.cmdline:*curl* OR process.cmdline:*systeminformation*)🔗 References
- https://github.com/sebhildebrandt/systeminformation/blob/master/lib/internet.js
- https://github.com/sebhildebrandt/systeminformation/commit/931fecaec2c1a7dcc10457bb8cd552d08089da61
- https://snyk.io/vuln/SNYK-JS-SYSTEMINFORMATION-1021909
- https://github.com/sebhildebrandt/systeminformation/blob/master/lib/internet.js
- https://github.com/sebhildebrandt/systeminformation/commit/931fecaec2c1a7dcc10457bb8cd552d08089da61
- https://snyk.io/vuln/SNYK-JS-SYSTEMINFORMATION-1021909
