CVE-2025-46215
📋 TL;DR
An improper isolation vulnerability in Fortinet FortiSandbox allows unauthenticated attackers to bypass sandbox scanning by submitting specially crafted files. This affects FortiSandbox versions 4.0, 4.2, 4.4.0-4.4.7, and 5.0.0-5.0.1, potentially enabling malware to evade detection.
💻 Affected Systems
- Fortinet FortiSandbox
📦 What is this software?
Fortisandbox by Fortinet
Fortisandbox by Fortinet
⚠️ Risk & Real-World Impact
Worst Case
Malware bypasses sandbox detection entirely, leading to successful network compromise and data exfiltration.
Likely Case
Targeted attackers evade sandbox analysis to deliver malware that would normally be detected.
If Mitigated
Malware is detected by other security layers (firewalls, endpoint protection) despite sandbox evasion.
🎯 Exploit Status
Requires crafting specific files to trigger the isolation bypass. No authentication needed to submit files for analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: FortiSandbox 5.0.2, 4.4.8, and later versions
Vendor Advisory: https://fortiguard.fortinet.com/psirt/FG-IR-24-501
Restart Required: Yes
Instructions:
1. Download the appropriate firmware update from Fortinet support portal. 2. Backup current configuration. 3. Apply firmware update via web interface or CLI. 4. Reboot the appliance. 5. Verify version after reboot.
🔧 Temporary Workarounds
Restrict file submission sources
allConfigure FortiSandbox to only accept files from trusted internal sources rather than allowing unauthenticated submissions.
config system interface
edit <interface>
set allowaccess https ssh
end
🧯 If You Can't Patch
- Isolate FortiSandbox appliance on internal network segments only
- Implement additional malware detection layers (endpoint protection, network monitoring)
🔍 How to Verify
Check if Vulnerable:
Check FortiSandbox version via web interface (System > Dashboard) or CLI command 'get system status'Check Version:
get system status | grep VersionVerify Fix Applied:
Verify version is 5.0.2+, 4.4.8+, or later after applying patch📡 Detection & Monitoring
Log Indicators:
- Multiple file analysis failures
- Files marked as clean that should be detected
- Unusual file submission patterns
Network Indicators:
- Unusual traffic from sandbox appliance
- Files bypassing expected analysis workflow
SIEM Query:
source="fortisandbox" AND (event="analysis_failed" OR result="clean") AND file_type="executable" | stats count by src_ip