Understanding and Defending Against Server-Side Request Forgery Vulnerabilities

The video discusses Server-Side Request Forgery (SSRF) and its implications as a security vulnerability. It includes a demonstration of a vulnerable webhook system, detailing how attackers can exploit this weakness to access internal services. The content covers the definition and significance of SSRF, describes how webhooks can become attack surfaces, and showcases defense mechanisms such as input validation, DNS rebinding protection, and the use of dedicated proxy services. Additionally, it highlights specific attacks, including those targeting instance metadata endpoints and the necessity of blocking certain IP ranges.