Restrict outbound traffic at the security group or firewall level. No instance should need to make arbitrary HTTP requests to its own metadata service except via trusted system processes.
If the instance has a high-privilege role (e.g., AdministratorAccess), the attacker could take over the entire cloud environment. Recommended Remediation Steps Restrict outbound traffic at the security group or
What is Azure Active Directory? A Complete Overview - Varonis They are commonly used in authentication and authorization
: Use a Web Application Firewall, such as AWS WAF , to block requests containing metadata IP addresses in the query string or body. such as OAuth
Callback URLs, also known as redirect URLs, are URLs that are used to redirect users from one application or service to another. They are commonly used in authentication and authorization protocols, such as OAuth, to facilitate the exchange of sensitive information between parties. The primary purpose of a callback URL is to provide a secure and trusted channel for the exchange of information, ensuring that sensitive data is not compromised during the communication process.
: If an application allows a user to provide a URL (like a callback or webhook) and then fetches that URL from the server side without validation, an attacker can input the internal 169.254.169.254 address.