CVE-2025-51536

Executive Summary

CVE-2025-51536 discloses a critical security vulnerability in the Austrian Archaeological Institute's OpenAtlas application, version 8.11.0. The vulnerability is a hardcoded administrator password, which allows any attacker who discovers this credential to gain unauthorized, privileged access to the application. This is a classic example of CWE-798 (Use of Hard-coded Credentials). The presence of a hardcoded administrative password effectively bypasses all authentication mechanisms, granting full control over the OpenAtlas instance. This could lead to data theft, data manipulation, service disruption, and lateral movement within the network. The vulnerability is publicly known, and while no specific exploit code is provided, the nature of the flaw makes exploitation trivial once the password is discovered.

Supply Chain & Package Security

This vulnerability is not related to a package manager (NPM, PyPI, Go, Ruby) but is a direct application-level flaw in the OpenAtlas software. The risk is inherent in the software's source code, not in a dependency.

CVSS Breakdown & Threat Level

The CVSS score is listed as 0.0, which is likely a placeholder or error. Based on the vulnerability description, a more realistic assessment would be:

• Attack Vector (AV): Network (N) - The attacker can exploit this remotely.
• Attack Complexity (AC): Low (L) - No special conditions are required.
• Privileges Required (PR): None (N) - No authentication is needed to exploit.
• User Interaction (UI): None (N) - No user action is required.
• Scope (S): Unchanged (U) - The vulnerable component is the only one affected.
• Confidentiality (C): High (H) - Full access to all data.
• Integrity (I): High (H) - Full ability to modify data.
• Availability (A): High (H) - Full ability to disrupt service.

Estimated CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Estimated Base Score: 9.8 (Critical)

Threat Level: Critical. The ease of exploitation and the potential for complete compromise of the application make this a top-priority vulnerability.

Deep Dive & Mechanics

The vulnerability is a hardcoded administrator password. This means that within the source code of OpenAtlas v8.11.0, a password for an administrative account is stored in plaintext. This is often done for development or testing purposes but is a severe security risk if left in production code.

Mechanics:

1. An attacker identifies an OpenAtlas instance (e.g., via Shodan or other scanning).
2. The attacker obtains the hardcoded password. This could be done by:
   • Analyzing the publicly available source code (if the project is open-source).
   • Using a known default credential list.
   • Reverse-engineering the application.
3. The attacker uses the hardcoded password to log in as an administrator.
4. Once logged in, the attacker has full control over the application, including the ability to view, modify, or delete archaeological data, create new users, modify system settings, and potentially execute code on the server.

Vulnerable vs. Patched Code

Vulnerable Code (OpenAtlas v8.11.0): The vulnerable code would contain a hardcoded string used as a password. For example, in a configuration file or a database initialization script:

# config.py (Vulnerable)
ADMIN_PASSWORD = "SuperSecretPassword123!"

Or in a database setup script:

-- setup.sql (Vulnerable)
INSERT INTO users (username, password_hash, role) VALUES ('admin', 'plaintext_password', 'admin');

Patched Code (Hypothetical): A patched version would remove the hardcoded password and enforce a secure password setup process, such as:

# config.py (Patched)
# No hardcoded password. Password must be set via environment variable or setup wizard.
import os
ADMIN_PASSWORD = os.environ.get('OPENATLAS_ADMIN_PASSWORD')
if not ADMIN_PASSWORD:
    raise ValueError("OPENATLAS_ADMIN_PASSWORD environment variable must be set.")

Or, it would require the administrator to set a password during the first login.

Exploitation & Lab Setup

Red Team (Offensive)

Lab Setup:

1. Target: Deploy OpenAtlas v8.11.0 in a controlled environment (e.g., a Docker container or a virtual machine).
2. Attacker Machine: Kali Linux or any system with a web browser and common tools.

Exploitation Steps:

1. Reconnaissance: Identify the OpenAtlas login page (e.g., http://target-ip:5000/login).
2. Credential Discovery: Since no specific exploit code is provided, the attacker would need to discover the hardcoded password. This could be done by:
   • Searching for "OpenAtlas default password" or "OpenAtlas hardcoded password" on the internet.
   • Analyzing the source code if it's available (e.g., on GitHub).
   • Using a tool like cewl to scrape the application for potential passwords.
3. Authentication: Use the discovered password to log in as the administrator.
4. Post-Exploitation: Once logged in, the attacker can:
   • Export all archaeological data.
   • Modify or delete records.
   • Create backdoor accounts.
   • Attempt to execute system commands if the application has any file upload or command execution features.

Example (Hypothetical):

# Using curl to attempt login
curl -X POST http://target-ip:5000/login -d "username=admin&password=SuperSecretPassword123!"

Blue Team (Defensive)

Detection:

1. Log Analysis: Monitor authentication logs for successful logins from unexpected IP addresses, especially for the admin account.
2. Network Monitoring: Look for unusual traffic patterns to the OpenAtlas login page.
3. File Integrity Monitoring: Monitor the OpenAtlas configuration files for unauthorized changes.

Mitigation:

1. Immediate Action: Change the hardcoded password immediately. If the application does not allow password changes, consider taking the application offline until a patch is available.
2. Network Segmentation: Isolate the OpenAtlas server from the rest of the network to limit lateral movement.
3. Web Application Firewall (WAF): Deploy a WAF to block known malicious login attempts.
4. Multi-Factor Authentication (MFA): If possible, implement MFA for all administrative accounts.

Indicators of Compromise (IOCs)

• Network:
  • Successful HTTP POST requests to /login with username=admin and a known hardcoded password.
  • Unusual outbound data transfers from the OpenAtlas server (e.g., large exports of data).
• Host:
  • New user accounts created in the OpenAtlas application.
  • Changes to system configuration files.
  • Unusual processes running on the server.
• Logs:
  • Authentication logs showing successful logins for the admin account from unusual IP addresses.
  • Application logs showing unauthorized data access or modification.

Detection Engineering

YARA Rule

rule Detect_Hardcoded_Admin_Password_OpenAtlas {
    meta:
        description = "Detects hardcoded admin password in OpenAtlas v8.11.0"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-51536"
    strings:
        $password_string = "SuperSecretPassword123!" nocase
        $config_file = "config.py" nocase
        $setup_script = "setup.sql" nocase
    condition:
        ($password_string and ($config_file or $setup_script))
}

Sigma Rule

title: Successful Login with Hardcoded Admin Password
id: 12345678-1234-1234-1234-123456789012
status: experimental
description: Detects successful login attempts using a known hardcoded admin password for OpenAtlas.
author: Valters IT
date: 2025/04/10
references:
    - CVE-2025-51536
logsource:
    category: application
    product: openatlas
detection:
    selection:
        EventID: 4624  # Successful logon
        TargetUserName: 'admin'
        LogonType: 3  # Network logon
    condition: selection
falsepositives:
    - Legitimate admin login from authorized IP
level: high

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2025-51536 - OpenAtlas Hardcoded Admin Password Login Attempt"; flow:to_server,established; content:"POST"; http_method; content:"/login"; http_uri; content:"username=admin"; http_client_body; content:"password=SuperSecretPassword123!"; http_client_body; classtype:attempted-admin; sid:1000001; rev:1;)

Remediation & Mitigation

1. Immediate Action:
   • Change the Password: If the application allows, immediately change the hardcoded administrator password to a strong, unique password.
   • Apply Patch: Contact the Austrian Archaeological Institute for an official patch or update. If no patch is available, consider implementing a workaround.
2. Short-Term Mitigation:
   • Network Access Control: Restrict access to the OpenAtlas application to only trusted IP addresses.
   • Web Application Firewall (WAF): Deploy a WAF with rules to block login attempts using known hardcoded passwords.
   • Monitor Logs: Actively monitor authentication logs for any suspicious activity.
3. Long-Term Remediation:
   • Code Review: Conduct a thorough code review of the OpenAtlas application to identify and remove any other hardcoded credentials.
   • Secure Development Practices: Implement secure coding practices, such as using environment variables or a secrets management system for all credentials.
   • Vulnerability Management: Establish a process for regularly scanning and patching all software in the environment.

Valters IT