CVE-2025-61489
📋 TL;DR
A command injection vulnerability in sonirico mcp-shell v0.3.1 allows attackers to execute arbitrary system commands by supplying malicious input to the shell_exec function. This affects any system running the vulnerable version of mcp-shell, potentially leading to complete system compromise.
💻 Affected Systems
- sonirico mcp-shell
📦 What is this software?
Mcp Shell by Sonirico
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with root/admin privileges, data exfiltration, ransomware deployment, or complete system destruction.
Likely Case
Unauthorized command execution leading to data theft, privilege escalation, or lateral movement within the network.
If Mitigated
Limited impact if proper input validation and sandboxing are implemented, potentially only affecting the application's own data.
🎯 Exploit Status
Command injection vulnerabilities typically have low exploitation complexity, especially when unauthenticated access is possible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://github.com/sonirico/mcp-shell/issues/4
Restart Required: No
Instructions:
1. Check the GitHub repository for updates. 2. Upgrade to a patched version when available. 3. Review the issue tracker for mitigation guidance.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation to reject any commands containing shell metacharacters or suspicious patterns.
# Example: Validate input doesn't contain shell metacharacters
if re.search(r'[;&|`$(){}[]<>]', user_input):
raise ValueError('Invalid input')
Use Safe Execution Functions
allReplace shell_exec with safer alternatives like subprocess.run with proper argument handling.
# Example using subprocess instead of shell_exec
import subprocess
subprocess.run(['ls', '-la'], capture_output=True)
🧯 If You Can't Patch
- Remove or disable mcp-shell v0.3.1 from production systems
- Implement network segmentation to isolate systems running the vulnerable version
🔍 How to Verify
Check if Vulnerable:
Check if mcp-shell version 0.3.1 is installed on the system. Review code for use of shell_exec with user-controlled input.Check Version:
# Check mcp-shell version
pip show mcp-shell | grep Version
# Or check package.json for versionVerify Fix Applied:
Verify that shell_exec is no longer used with untrusted input, or that proper input validation/sanitization has been implemented.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns
- Shell commands with unexpected arguments or metacharacters
- Multiple failed command execution attempts
Network Indicators:
- Unexpected outbound connections from the mcp-shell process
- Command and control traffic patterns
SIEM Query:
process.name:"mcp-shell" AND (command_line:*[;&|`$()]* OR command_line:*curl* OR command_line:*wget*)