Rails Master Key detected in code

Rule Details

Cortex AppSec Rule ID	APPSEC_SECRET_256
Category	Encryption Keys
Severity	MEDIUM
Framework	Git

Impact

The Rails Master Key is a highly sensitive credential used for encrypting sensitive data, such as database credentials and session cookies.

Exposure of this key could allow attackers to decrypt sensitive information, hijack user sessions, or gain unauthorized access to the application’s underlying data.

How to Fix

To remediate exposed Auth tokens or Signing Keys:

1. Log in to your Identity Provider or OAuth provider settings.
2. Rotate the compromised Client Secret, Private Key, or Signing Certificate.
3. Update your application configuration with the new credentials.
4. Redeploy your application to ensure the new keys are in effect.

Next, remove the secret from your codebase:

1. Locate the exposed secret in your codebase.
2. Replace the hardcoded value with a secure variable or reference.

Finally, clean your version control history:

1. Permanently remove the sensitive data from your version control history to ensure it cannot be retrieved.

Warning: Rotating signing keys or client secrets will likely invalidate active user sessions or tokens. Be prepared for users to be logged out.