CVE-2022-30303
📋 TL;DR
This vulnerability allows authenticated attackers to execute arbitrary shell commands with root privileges on FortiWeb web application firewalls. It affects FortiWeb versions 6.3.0-6.3.19, 6.4 all versions, and 7.0.0-7.0.1. Attackers can exploit this via crafted HTTP requests to gain complete control of affected devices.
💻 Affected Systems
- FortiWeb Web Application Firewall
📦 What is this software?
Fortiweb by Fortinet
Fortiweb by Fortinet
Fortiweb by Fortinet
Fortiweb by Fortinet
Fortiweb by Fortinet
Fortiweb by Fortinet
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of FortiWeb device leading to data exfiltration, lateral movement into protected networks, and persistent backdoor installation.
Likely Case
Attackers gain root shell access to modify configurations, disable security controls, and intercept or manipulate web traffic.
If Mitigated
Limited impact due to network segmentation, strong authentication controls, and monitoring preventing successful exploitation.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once credentials are obtained. The vulnerability is in the web management interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: FortiWeb 7.0.2, 6.3.20, and 6.4.1
Vendor Advisory: https://fortiguard.com/psirt/FG-IR-22-163
Restart Required: Yes
Instructions:
1. Download the appropriate firmware update from Fortinet support portal. 2. Backup current configuration. 3. Upload and install the firmware update via web GUI or CLI. 4. Reboot the device after installation completes.
🔧 Temporary Workarounds
Restrict Management Access
allLimit access to FortiWeb management interface to trusted IP addresses only
config system interface
edit <interface_name>
set allowaccess https ssh
set trust-ip-1 <trusted_ip>
end
Enable Multi-Factor Authentication
allRequire MFA for all administrative accounts to prevent credential-based attacks
config system admin
edit <admin_user>
set two-factor enable
set two-factor fortitoken
end
🧯 If You Can't Patch
- Isolate FortiWeb devices from internet access and restrict to internal management networks only.
- Implement strict network segmentation to limit potential lateral movement if device is compromised.
🔍 How to Verify
Check if Vulnerable:
Check FortiWeb firmware version via web GUI (System > Dashboard) or CLI command 'get system status'Check Version:
get system status | grep VersionVerify Fix Applied:
Verify firmware version is 7.0.2+, 6.3.20+, or 6.4.1+ after patching📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in system logs
- Multiple failed authentication attempts followed by successful login
- Configuration changes from unexpected sources
Network Indicators:
- Unusual outbound connections from FortiWeb management interface
- HTTP requests with shell metacharacters or command injection patterns
SIEM Query:
source="fortiweb" AND (event_type="admin_login" OR event_type="config_change") AND src_ip NOT IN [trusted_management_ips]