CVE-2024-13871: Bitdefender Box Firmware RCE Vulnerability

CVE-2024-13871 Overview

CVE-2024-13871 is a command injection vulnerability in the /check_image_and_trigger_recovery API endpoint of Bitdefender Box 1 running firmware 1.3.11.490. An unauthenticated attacker on an adjacent network can inject shell commands into the endpoint and execute them on the device. Successful exploitation leads to full remote code execution on the affected appliance. The flaw is tracked under CWE-77 (Improper Neutralization of Special Elements used in a Command).

Critical Impact
Unauthenticated network-adjacent attackers can achieve remote code execution on Bitdefender Box 1 devices, compromising the security appliance that inspects home network traffic.

Affected Products

Bitdefender Box 1 (hardware appliance)
Bitdefender Box firmware version 1.3.11.490
Deployments exposing the Box management API on adjacent networks

Discovery Timeline

2025-03-12 - CVE-2024-13871 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-13871

Vulnerability Analysis

The vulnerability resides in the /check_image_and_trigger_recovery API endpoint exposed by Bitdefender Box 1. The endpoint accepts attacker-controlled input and passes it into a shell command context without proper neutralization of metacharacters. Because the endpoint does not require authentication, any client that can reach the Box over the adjacent network can invoke it. An attacker can chain arbitrary operating system commands using standard shell separators.

Bitdefender Box operates as an inline network security appliance for home and small-office networks. Compromise of the device grants an attacker a privileged foothold with visibility into all traffic transiting the appliance. From this position, an attacker can pivot to protected endpoints, disable protective functions, or persist across reboots by modifying firmware components.

Root Cause

The recovery endpoint fails to sanitize input before invoking a system shell. Values expected to reference image parameters are concatenated into a command string and executed by the underlying operating system. This is a classic CWE-77 pattern where user-supplied data crosses a trust boundary into a command interpreter.

Attack Vector

Exploitation requires network adjacency to the Box appliance, typically meaning the attacker is connected to the same LAN or wireless segment. No credentials, user interaction, or prior compromise are needed. The attacker sends a crafted HTTP request to /check_image_and_trigger_recovery containing shell metacharacters in a vulnerable parameter, causing the injected commands to execute with the privileges of the API service.

Refer to the Bitdefender Security Advisory for vendor-provided technical details.

Detection Methods for CVE-2024-13871

Indicators of Compromise

HTTP requests to the /check_image_and_trigger_recovery endpoint originating from unexpected internal hosts
Presence of shell metacharacters (;, |, &, backticks, $()) in request parameters targeting the recovery endpoint
Unexpected outbound connections from the Box appliance to attacker-controlled infrastructure
New or modified files in writable firmware locations following recovery API calls

Detection Strategies

Inspect HTTP traffic to the Box management interface for requests to /check_image_and_trigger_recovery and flag payloads containing command separators
Monitor the appliance for anomalous child processes spawned by the API service handler
Baseline normal traffic patterns from the Box and alert on deviations such as reverse shell or DNS tunneling behavior

Monitoring Recommendations

Enable network traffic logging on the LAN segment hosting the Box appliance and forward logs to a centralized analytics platform
Alert on any unauthenticated POST or GET requests to Box firmware or recovery endpoints
Track firmware version and integrity of the Box via periodic checks against the vendor-published values

How to Mitigate CVE-2024-13871

Immediate Actions Required

Apply the firmware update published in the Bitdefender Security Advisory as soon as it is available for the device
Restrict access to the Box management interface to trusted administrative hosts only
Segment the Box appliance onto a dedicated management VLAN to limit adjacent-network exposure
Audit the device for signs of prior exploitation before returning it to production

Patch Information

Bitdefender has published a security advisory covering the unauthenticated command injection in Bitdefender Box v1. Consult the vendor advisory for firmware update instructions and the fixed version. Bitdefender Box 1 is a discontinued product line, so users should verify whether an update path is available or whether replacement with a supported device is required.

Workarounds

Isolate the Box appliance on a network segment inaccessible to untrusted clients and guest devices
Disable or block wireless guest access that could allow adjacent-network reachability to the Box
Retire and replace end-of-life Bitdefender Box 1 hardware if no firmware fix is provided for your device

bash

# Example: restrict access to the Box management interface with an upstream firewall rule
# Replace <BOX_IP> with the appliance address and <ADMIN_SUBNET> with the trusted management subnet
iptables -A FORWARD -d <BOX_IP> -p tcp --dport 80 -s <ADMIN_SUBNET> -j ACCEPT
iptables -A FORWARD -d <BOX_IP> -p tcp --dport 80 -j DROP
iptables -A FORWARD -d <BOX_IP> -p tcp --dport 443 -s <ADMIN_SUBNET> -j ACCEPT
iptables -A FORWARD -d <BOX_IP> -p tcp --dport 443 -j DROP