CVE-2024-42166
📋 TL;DR
This vulnerability allows authenticated users with application creation permissions to execute arbitrary operating system commands by creating applications with malicious names in FIWARE Keyrock. The OS command injection occurs because the 'generate_app_certificates' function doesn't properly sanitize input. Systems running FIWARE Keyrock version 8.4 or earlier are affected.
💻 Affected Systems
- FIWARE Keyrock
📦 What is this software?
Keyrock by Fiware
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attackers to execute arbitrary commands with the privileges of the FIWARE Keyrock process, potentially leading to data theft, system takeover, or lateral movement within the network.
Likely Case
Authenticated attackers with application creation privileges can execute commands to exfiltrate sensitive data, create backdoors, or disrupt services.
If Mitigated
Limited impact if proper input validation and command sanitization are implemented, restricting attackers to the application's sandboxed environment.
🎯 Exploit Status
Exploitation requires authenticated access with application creation privileges. The vulnerability is straightforward to exploit once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: > 8.4
Vendor Advisory: https://www.ait.ac.at/themen/cyber-security/pentesting/security-advisories
Restart Required: Yes
Instructions:
1. Upgrade FIWARE Keyrock to version 8.5 or later. 2. Restart the FIWARE Keyrock service. 3. Verify the fix by checking the version and testing application creation with special characters.
🔧 Temporary Workarounds
Restrict Application Creation Permissions
allTemporarily remove or restrict permissions for users to create applications until patching is complete.
Input Validation Filter
allImplement a web application firewall or input validation filter to block special characters in application names.
🧯 If You Can't Patch
- Implement strict least-privilege access controls to limit who can create applications.
- Monitor and audit application creation logs for suspicious activity and unusual application names.
🔍 How to Verify
Check if Vulnerable:
Check the FIWARE Keyrock version. If it's 8.4 or earlier, the system is vulnerable. Review user permissions to see who can create applications.Check Version:
Check the package version or application configuration files for the FIWARE Keyrock version number.Verify Fix Applied:
After upgrading to version 8.5 or later, attempt to create an application with special characters in the name. The system should reject or sanitize the input without executing commands.📡 Detection & Monitoring
Log Indicators:
- Unusual application creation events with special characters in names
- Unexpected command execution logs from the FIWARE Keyrock process
Network Indicators:
- Suspicious outbound connections from the FIWARE Keyrock server
SIEM Query:
Search for application creation events in FIWARE Keyrock logs containing special characters like ;, |, &, $, or backticks.