CVE-2024-13871
📋 TL;DR
An unauthenticated command injection vulnerability in Bitdefender Box 1 allows network-adjacent attackers to execute arbitrary commands on the device, potentially leading to full system compromise. This affects Bitdefender Box 1 devices running vulnerable firmware versions. Attackers must be on the same local network as the device to exploit this vulnerability.
💻 Affected Systems
- Bitdefender Box 1
📦 What is this software?
Box Firmware by Bitdefender
⚠️ Risk & Real-World Impact
Worst Case
Full remote code execution leading to complete device takeover, data exfiltration, lateral movement to other network devices, and persistent backdoor installation.
Likely Case
Unauthenticated attackers gaining shell access to execute commands, potentially installing malware or modifying device configuration.
If Mitigated
Limited impact if network segmentation prevents adjacent access or if the device is isolated from critical systems.
🎯 Exploit Status
Exploitation requires crafting specific HTTP requests to the vulnerable API endpoint. No authentication is needed, but attacker must be network-adjacent.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to latest firmware version (check vendor advisory)
Vendor Advisory: https://bitdefender.com/support/security-advisories/unauthenticated-command-injection-in-bitdefender-box-v1
Restart Required: Yes
Instructions:
1. Log into Bitdefender Box web interface. 2. Navigate to Settings > Firmware Update. 3. Check for and apply available updates. 4. Reboot the device after update completes.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Bitdefender Box from untrusted network segments to prevent adjacent attacker access.
Access Control Lists
allImplement firewall rules to restrict access to the vulnerable API endpoint (port 80/443).
🧯 If You Can't Patch
- Physically isolate the device on a dedicated VLAN with strict access controls
- Monitor network traffic to/from the device for suspicious API calls to /check_image_and_trigger_recovery endpoint
🔍 How to Verify
Check if Vulnerable:
Check firmware version in web interface: Settings > About. If version is 1.3.11.490, device is vulnerable.Check Version:
Check web interface or use curl: curl -k https://[device-ip]/api/versionVerify Fix Applied:
After updating, verify firmware version is no longer 1.3.11.490. Test API endpoint with controlled payloads if possible.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP POST requests to /check_image_and_trigger_recovery endpoint
- Shell command execution logs from unexpected sources
- Failed authentication attempts followed by API calls
Network Indicators:
- HTTP requests to /check_image_and_trigger_recovery with shell metacharacters in parameters
- Outbound connections from Bitdefender Box to unexpected destinations
SIEM Query:
source="bitdefender-box" AND (url="/check_image_and_trigger_recovery" OR cmd="*sh*" OR cmd="*bash*")