CVE-2021-23412
📋 TL;DR
CVE-2021-23412 is a command injection vulnerability in the gitlogplus npm package that allows attackers to execute arbitrary commands on the host system. The vulnerability occurs because user-supplied options are appended to shell commands without proper sanitization. This affects any application using vulnerable versions of gitlogplus.
💻 Affected Systems
- gitlogplus
📦 What is this software?
Gitlogplus by Gitlogplus Project
Gitlogplus by Gitlogplus Project
Gitlogplus by Gitlogplus Project
Gitlogplus by Gitlogplus Project
Gitlogplus by Gitlogplus Project
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing remote code execution, data theft, lateral movement, and complete control of the affected server.
Likely Case
Arbitrary command execution with the privileges of the application process, potentially leading to data exfiltration, service disruption, or installation of malware.
If Mitigated
Limited impact if the application runs with minimal privileges, has network restrictions, and proper input validation is implemented.
🎯 Exploit Status
Exploitation is straightforward as it involves passing malicious input to the vulnerable function. Public proof-of-concept exists in vulnerability reports.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.2.6
Vendor Advisory: https://www.npmjs.com/advisories/1568
Restart Required: No
Instructions:
1. Update gitlogplus to version 0.2.6 or later using 'npm update gitlogplus'. 2. Verify the update with 'npm list gitlogplus'. 3. Test your application functionality after the update.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation for all parameters passed to gitlogplus functions
Remove Package
allIf gitlogplus is not essential, remove it from your project
npm uninstall gitlogplus
🧯 If You Can't Patch
- Run the application with minimal privileges (non-root user)
- Implement network segmentation to limit the impact of potential compromise
🔍 How to Verify
Check if Vulnerable:
Check package.json or run 'npm list gitlogplus' to see if version is below 0.2.6Check Version:
npm list gitlogplus | grep gitlogplusVerify Fix Applied:
Run 'npm list gitlogplus' and verify version is 0.2.6 or higher📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns
- Suspicious git operations with unexpected parameters
- Process spawning from Node.js applications
Network Indicators:
- Unexpected outbound connections from the application server
- Data exfiltration patterns
SIEM Query:
process.name:node AND cmdline:*gitlogplus* AND (cmdline:*;* OR cmdline:*&* OR cmdline:*|*)