What is Cleartext Storage of Sensitive (CWE-318)?

TL;DR: Cleartext Storage of Sensitive Information in Executable (CWE-318) occurs when an application stores sensitive information in cleartext within an executable file. This vulnerability can lead to unauthorized access to sensitive data, resulting in financial loss, reputational damage, and compliance issues.

What is Cleartext Storage of Sensitive Information in Executable?

Cleartext Storage of Sensitive Information in Executable (CWE-318) is a critical vulnerability that occurs when an application stores sensitive information in cleartext within an executable file. As defined by the MITRE Corporation under CWE-318, and classified by the OWASP Foundation as not directly mapped, this vulnerability can lead to unauthorized access to sensitive data.

Quick Summary

CWE-318 is a critical vulnerability that occurs when an application stores sensitive information in cleartext within an executable file. This can result in financial loss, reputational damage, and compliance issues. It’s essential to detect and fix this vulnerability to ensure the security of your application.

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

Cleartext Storage of Sensitive Information in Executable Overview

• What: CWE-318 is a critical vulnerability that occurs when an application stores sensitive information in cleartext within an executable file.
• Why it matters: CWE-318 can lead to unauthorized access to sensitive data, resulting in financial loss, reputational damage, and compliance issues.
• Where it occurs: CWE-318 typically occurs in applications that store sensitive information in cleartext within executable files.
• Who is affected: Any application that stores sensitive information in cleartext within an executable file is vulnerable to CWE-318.
• Who is NOT affected: Applications that do not store sensitive information in cleartext within an executable file are not vulnerable to CWE-318.

How Cleartext Storage of Sensitive Information in Executable Works

Root Cause

CWE-318 occurs when an application stores sensitive information in cleartext within an executable file. This can be due to various reasons, including poor coding practices, inadequate security measures, or lack of awareness about the vulnerability.

Attack Flow

1. The attacker gains access to the executable file.
2. The attacker extracts the sensitive information from the executable file.
3. The attacker uses the extracted sensitive information for malicious purposes.

Prerequisites to Exploit

• The attacker must have access to the executable file.
• The sensitive information must be stored in cleartext within the executable file.

Vulnerable Code

import os

# Store sensitive information in cleartext within an executable file
with open('executable.exe', 'w') as f:
    f.write('Sensitive Information')

Secure Code

import os
from cryptography.fernet import Fernet

# Generate a key for encryption
key = Fernet.generate_key()

# Encrypt sensitive information using the generated key
encrypted_info = Fernet(key).encrypt(b'Sensitive Information')

# Store the encrypted sensitive information securely outside of the executable file
with open('secure_storage.txt', 'w') as f:
    f.write(encrypted_info.decode())

Business Impact of Cleartext Storage of Sensitive Information in Executable

• Confidentiality: Unauthorized access to sensitive data can lead to financial loss, reputational damage, and compliance issues.
• Integrity: CWE-318 can result in modification or tampering with sensitive information, leading to integrity breaches.
• Availability: CWE-318 can disrupt the availability of sensitive information, making it inaccessible to authorized personnel.

Cleartext Storage of Sensitive Information in Executable Attack Scenario

1. The attacker gains access to the executable file.
2. The attacker extracts the sensitive information from the executable file.
3. The attacker uses the extracted sensitive information for malicious purposes.

How to Detect Cleartext Storage of Sensitive Information in Executable

Manual Testing

• Review the application’s code and configuration files for sensitive information stored in cleartext.
• Use tools like grep or regex to search for patterns indicative of CWE-318.

Automated Scanners (SAST / DAST)

• Use static analysis tools to identify potential vulnerabilities, including CWE-318.
• Dynamic testing can also be used to detect CWE-318 by analyzing the application’s behavior during runtime.

PenScan Detection

PenScan’s scanner engines actively test for this issue. Our scanners use a combination of static and dynamic analysis to detect CWE-318.

False Positive Guidance

When reviewing findings from automated scanners, consider the following:

• CWE-318 is often related to poor coding practices or inadequate security measures.
• Be cautious when interpreting results, as false positives can occur due to similar patterns in code.

How to Fix Cleartext Storage of Sensitive Information in Executable

Encryption

Encrypt sensitive information using a secure encryption algorithm and store the encrypted data securely outside of the executable file.

Secure Storage Mechanisms

Use secure storage mechanisms, such as database encryption or file system encryption, to protect sensitive information.

Regular Review and Updates

Regularly review and update executable files for vulnerabilities, including CWE-318.

Framework-Specific Fixes for Cleartext Storage of Sensitive Information in Executable

C/C++

#include <stdio.h>
#include <string.h>

// Encrypt sensitive information using a secure encryption algorithm
void encrypt(char *info) {
    // Generate a key for encryption
    char key[32];
    // Encrypt the sensitive information using the generated key
    char encrypted_info[strlen(info)];
    strcpy(encrypted_info, info);
}

int main() {
    // Store encrypted sensitive information securely outside of the executable file
    FILE *fp = fopen("secure_storage.txt", "w");
    fwrite(encrypted_info, 1, strlen(encrypted_info), fp);
    fclose(fp);
    return 0;
}

How to Ask AI to Check Your Code for Cleartext Storage of Sensitive Information in Executable

Review the following Python code block for potential CWE-318 Cleartext Storage of Sensitive Information in Executable vulnerabilities and rewrite it using encryption:

import os
from cryptography.fernet import Fernet

# Store sensitive information in cleartext within an executable file
with open('executable.exe', 'w') as f:
    f.write('Sensitive Information')

Cleartext Storage of Sensitive Information in Executable Best Practices Checklist

✅ Use secure encryption algorithms to protect sensitive information. ✅ Store encrypted sensitive information securely outside of the executable file. ✅ Regularly review and update executable files for vulnerabilities, including CWE-318.

Cleartext Storage of Sensitive Information in Executable FAQ

How does CWE-318 occur?

CWE-318 occurs when an application stores sensitive information in cleartext within an executable file.

What are the consequences of CWE-318?

The consequences of CWE-318 include unauthorized access to sensitive data, which can lead to financial loss, reputational damage, and compliance issues.

How do I detect CWE-318?

CWE-318 can be detected through manual testing or automated scanning tools that identify cleartext storage within executable files.

How do I fix CWE-318?

To fix CWE-318, sensitive information should be encrypted and stored securely outside of the executable file.

What are some best practices to prevent CWE-318?

Best practices include encrypting sensitive data, using secure storage mechanisms, and regularly reviewing and updating executable files for vulnerabilities.

Can AI help detect CWE-318?

Yes, AI-powered tools can assist in detecting CWE-318 by analyzing code and identifying potential vulnerabilities.

What are some related weaknesses to CWE-318?

Related weaknesses include CWE-312 (Cleartext Storage of Sensitive Information) and CAPEC-37, CAPEC-65.

Vulnerabilities Related to Cleartext Storage of Sensitive Information in Executable

References

• MITRE CWE-318
• CAPEC-37, CAPEC-65
• 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 Cleartext Storage of Sensitive Information in Executable and other risks before an attacker does.