Azure Functions App Key Header detected in code

Rule Details

Cortex AppSec Rule ID	APPSEC_SECRET_266
Category	Secrets
Severity	HIGH
Framework	Git

Impact

The Azure Functions App Key (Header) secures access to a specific Function endpoint when passed via the HTTP Authorization Header.

Exposure allows unauthorized requests to be processed, leading to misuse of the function's logic, unauthorized access to linked data or resources, and potential escalation of privileges.

How to Fix

To remediate exposed Cloud & Infrastructure credentials:

1. Log in to your cloud provider's console.
2. Locate the identity or service account associated with the compromised credentials.
3. Revoke or deactivate the compromised keys immediately.
4. Generate a new set of credentials.
5. Update your environment variables, secrets manager, or pipelines with the new values.

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: Revoking infrastructure keys may cause immediate downtime. Ensure you have identified all dependent services before revoking.