Leverage SSRF for Metadata Access:

Server-side request forgery (SSRF) vulnerabilities allow attackers to force a server to send requests to internal resources. In cloud environments, SSRF can often be used to access the metadata service (e.g., AWS EC2 metadata) to retrieve credentials for cloud services.

Once credentials are obtained, they can be used to access privileged systems that are not directly accessible from the internet.

Why Not Other Options?

A (Public bucket): Analyzing the bucket for sensitive data is useful but does not directly lead to privileged system access.

B (Pacu): Pacu is used for AWS exploitation but requires credentials or misconfigured roles. SSRF can provide the credentials needed to run Pacu effectively.

C (SSH brute force): Brute-forcing SSH is noisy and inefficient. Privileged systems are likely better protected than SSH open to the internet.

D (Phishing via XSS): This is a longer-term attack and less direct compared to leveraging SSRF.

CompTIA Pentest+ References:

Domain 3.0 (Attacks and Exploits)

SSRF Exploitation and Cloud Metadata Access Techniques