What is Empty Password in Configuration File (CWE-258)?

TL;DR: An empty password in a configuration file is a type of Authentication Failures vulnerability that can lead to unauthorized access and privilege escalation.

What is Empty Password in Configuration File?

Empty Password in Configuration File (CWE-258) is a type of Authentication Failures vulnerability that occurs when an empty string is used as a password in a configuration file. As defined by the MITRE Corporation under CWE-258, and classified by the OWASP Foundation under A07:2025 - Authentication Failures…

Quick Summary

Using an empty password in a configuration file can lead to unauthorized access and privilege escalation, allowing attackers to gain control over the system or application. This vulnerability is often caused by human error or inadequate security measures.

Jump to: Quick Summary · Empty Password in Configuration File Overview · How Empty Password in Configuration File Works · Business Impact of Empty Password in Configuration File · Empty Password in Configuration File Attack Scenario · How to Detect Empty Password in Configuration File · How to Fix Empty Password in Configuration File · Framework-Specific Fixes for Empty Password in Configuration File · How to Ask AI to Check Your Code for Empty Password in Configuration File · Empty Password in Configuration File Best Practices Checklist · Empty Password in Configuration File FAQ · Vulnerabilities Related to Empty Password in Configuration File · References · Scan Your Own Site

Empty Password in Configuration File Overview

What

Empty Password in Configuration File (CWE-258) is a type of Authentication Failures vulnerability that occurs when an empty string is used as a password in a configuration file.

Why it matters

Using an empty password in a configuration file can lead to unauthorized access and privilege escalation, allowing attackers to gain control over the system or application.

Where it occurs

This vulnerability often occurs in configuration files, where passwords are stored or set.

Who is affected

Any user or system that uses the affected configuration file may be affected by this vulnerability.

Who is NOT affected

Systems or applications that use secure password storage mechanisms and regularly review their configuration files are not affected by this vulnerability.

How Empty Password in Configuration File Works

Root Cause

The root cause of this vulnerability is the use of an empty string as a password in a configuration file.

Attack Flow

1. An attacker discovers the vulnerable configuration file.
2. The attacker uses the empty password to gain access to the system or application.
3. The attacker escalates privileges and gains control over the system or application.

Prerequisites to Exploit

The following prerequisites must be true for this vulnerability to be exploitable:

• The configuration file contains an empty string as a password.
• The attacker has access to the vulnerable configuration file.

Vulnerable Code

# Vulnerable code: Using an empty string as a password in a configuration file
config['password'] = ''

This code demonstrates how using an empty string as a password can lead to unauthorized access and privilege escalation.

Secure Code

# Secure code: Using a secure password storage mechanism
import secrets
config['password'] = secrets.token_urlsafe(32)

This code shows how using a secure password storage mechanism can prevent this vulnerability.

Business Impact of Empty Password in Configuration File

The business impact of this vulnerability includes:

• Unauthorized access and privilege escalation, allowing attackers to gain control over the system or application.
• Data breaches and loss of sensitive information.
• Financial losses due to downtime and repair costs.
• Reputation damage due to security incidents.

Confidentiality: The use of an empty password in a configuration file can lead to unauthorized access and data breaches.

Integrity: The use of an empty password in a configuration file can allow attackers to modify or delete sensitive information.

Availability: The use of an empty password in a configuration file can disrupt system or application availability, leading to downtime and financial losses.

Empty Password in Configuration File Attack Scenario

1. An attacker discovers the vulnerable configuration file.
2. The attacker uses the empty password to gain access to the system or application.
3. The attacker escalates privileges and gains control over the system or application.

How to Detect Empty Password in Configuration File

Manual Testing

• Review the configuration files for empty passwords.
• Check if all passwords are properly set and configured.

Automated Scanners (SAST / DAST)

Automated scanners can detect this vulnerability by checking for empty strings used as passwords in configuration files. However, dynamic analysis is required to determine if the password is actually used or not.

PenScan Detection

PenScan’s scanner engines actively test for this issue and provide detailed reports on vulnerabilities found.

False Positive Guidance

A finding of this vulnerability may be a false positive if the empty string is used as a placeholder or temporary value, rather than an actual password. Contextual information should be reviewed to determine if the finding is legitimate.

How to Fix Empty Password in Configuration File

• Ensure that all passwords are properly set and configured.
• Use secure password storage mechanisms.
• Regularly review and update configuration files.

Framework-Specific Fixes for Empty Password in Configuration File

Java

// Secure code: Using a secure password storage mechanism in Java
import java.security.SecureRandom;
config['password'] = new String(new char[32]).replace('\0', 'a');

Node.js

// Secure code: Using a secure password storage mechanism in Node.js
const crypto = require('crypto');
config['password'] = crypto.randomBytes(32).toString('hex');

Python/Django

# Secure code: Using a secure password storage mechanism in Python/Django
import secrets
config['password'] = secrets.token_urlsafe(32)

PHP

// Secure code: Using a secure password storage mechanism in PHP
$config['password'] = bin2hex(random_bytes(16));

How to Ask AI to Check Your Code for Empty Password in Configuration File

You can use the following prompt with an AI coding assistant:

“Review the following [language] code block for potential CWE-258 Empty Password in Configuration File vulnerabilities and rewrite it using secure password storage mechanisms: [paste code here].”

Empty Password in Configuration File Best Practices Checklist

✅ Use secure password storage mechanisms. ✅ Ensure that all passwords are properly set and configured. ✅ Regularly review and update configuration files.

Empty Password in Configuration File FAQ

How does an empty password in a configuration file occur?

An empty password in a configuration file occurs when the password field is left blank or contains only whitespace characters.

What are the consequences of using an empty password in a configuration file?

Using an empty password in a configuration file can lead to unauthorized access and privilege escalation, allowing attackers to gain control over the system or application.

How do I detect an empty password in a configuration file?

You can use manual testing by reviewing the configuration files for empty passwords or using automated scanners that check for this vulnerability.

What is the best way to prevent an empty password in a configuration file?

The best way to prevent an empty password in a configuration file is to ensure that all passwords are properly set and configured, and to use secure password storage mechanisms.

Can AI help me detect and fix empty passwords in my configuration files?

Yes, you can use AI-powered code review tools to detect and fix empty passwords in your configuration files.

What are some best practices for preventing empty passwords in configuration files?

Some best practices include using secure password storage mechanisms, ensuring that all passwords are properly set and configured, and regularly reviewing and updating configuration files.

How do I know if an empty password is a false positive or not?

You can check the context of the finding to determine if it’s a true vulnerability or a false positive.

Vulnerabilities Related to Empty Password in Configuration File

References

• MITRE CWE-258
• OWASP A07:2025 - Authentication Failures
• NVD

Scan Your Own Site

Manual code review catches what you know to look for. An automated scan catches what you didn’t. Scan your own website using PenScan to find Empty Password in Configuration File and other risks before an attacker does.