CVE-2024-20374
📋 TL;DR
This vulnerability allows authenticated administrators in Cisco Secure Firewall Management Center to execute arbitrary commands as root via crafted HTTP requests due to insufficient input validation. It affects Cisco FMC software with web-based management interfaces. Attackers need administrator credentials to exploit this command injection flaw.
💻 Affected Systems
- Cisco Secure Firewall Management Center (FMC)
- Firepower Management Center
📦 What is this software?
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with root-level command execution, allowing data theft, lateral movement, or persistent backdoor installation.
Likely Case
Privileged attacker with legitimate credentials executes commands to exfiltrate configuration data, modify firewall rules, or disrupt operations.
If Mitigated
Limited impact due to strong credential protection, network segmentation, and monitoring preventing successful exploitation.
🎯 Exploit Status
Exploitation requires administrator credentials but is straightforward once authenticated
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Cisco advisory for specific fixed versions
Vendor Advisory: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-cmd-inj-2HBkA97G
Restart Required: Yes
Instructions:
1. Review Cisco advisory for affected versions. 2. Download and apply appropriate patch from Cisco. 3. Restart FMC services as required. 4. Verify patch installation.
🔧 Temporary Workarounds
Restrict administrative access
allLimit administrative interface access to trusted IP addresses only
Configure firewall rules to restrict access to FMC management interface
Credential hardening
allImplement strong password policies and multi-factor authentication for administrative accounts
Enable MFA in Cisco FMC administration settings
🧯 If You Can't Patch
- Implement strict network segmentation to isolate FMC management interfaces
- Enhance monitoring and alerting for unusual administrative activities
🔍 How to Verify
Check if Vulnerable:
Check Cisco FMC software version against affected versions in Cisco advisoryCheck Version:
Check version in FMC web interface or via CLI: show versionVerify Fix Applied:
Verify installed version matches or exceeds patched version from Cisco advisory📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to management interface
- Unexpected command execution logs
- Administrative account anomalies
Network Indicators:
- Suspicious HTTP traffic patterns to FMC management ports
- Unexpected outbound connections from FMC
SIEM Query:
Search for HTTP requests with unusual parameters to FMC management interface from administrative accounts