CVE-2020-7688
📋 TL;DR
CVE-2020-7688 is an OS command injection vulnerability in the mversion npm package that allows attackers to execute arbitrary commands on the host system. The vulnerability occurs when user-controlled input is passed directly to the exec function without proper sanitization. This affects any application using vulnerable versions of mversion.
💻 Affected Systems
- mversion
📦 What is this software?
Mversion by Mversion Project
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing remote code execution, data exfiltration, and lateral movement within the network.
Likely Case
Arbitrary command execution leading to data theft, service disruption, or installation of malware.
If Mitigated
Limited impact if input validation and proper sandboxing are implemented.
🎯 Exploit Status
Exploitation requires the ability to control the tagName parameter passed to the vulnerable function.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.0.1
Vendor Advisory: https://github.com/mikaelbr/mversion/commit/b7a8b32600e60759a7ad3921ec4a2750bf173482
Restart Required: No
Instructions:
1. Update mversion to version 2.0.1 or later using npm update mversion. 2. Verify the update with npm list mversion. 3. Test application functionality.
🔧 Temporary Workarounds
Input Validation
allImplement strict input validation for tagName parameter to prevent command injection.
Sandbox Execution
allRun mversion in a containerized or sandboxed environment to limit potential damage.
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all user inputs passed to mversion.
- Isolate the vulnerable component in a restricted network segment with minimal permissions.
🔍 How to Verify
Check if Vulnerable:
Check package.json or run npm list mversion to see if version is below 2.0.1.Check Version:
npm list mversionVerify Fix Applied:
Confirm mversion version is 2.0.1 or higher using npm list mversion.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in system logs
- Unexpected child process spawns from Node.js applications
Network Indicators:
- Outbound connections from the application to unexpected destinations
- Command and control traffic patterns
SIEM Query:
Process creation events where parent process is node.exe and command line contains suspicious shell metacharacters🔗 References
- https://github.com/418sec/huntr/pull/102
- https://github.com/mikaelbr/mversion/commit/b7a8b32600e60759a7ad3921ec4a2750bf173482
- https://snyk.io/vuln/SNYK-JS-MVERSION-573174
- https://github.com/418sec/huntr/pull/102
- https://github.com/mikaelbr/mversion/commit/b7a8b32600e60759a7ad3921ec4a2750bf173482
- https://snyk.io/vuln/SNYK-JS-MVERSION-573174
