Application Layer Attacks

Distributed Denial-of-Service (DDoS) attacks targeting the application layer, also known as Layer 7 attacks, are particularly disruptive because they exploit the application layer of the OSI model. Here's an overview:

How They Work: These attacks mimic legitimate user behaviour, making it difficult to distinguish between malicious and genuine traffic. For example, attackers might flood a web server with HTTP GET or POST requests, overwhelming its resources.

Why They're Effective: Application layer attacks require fewer resources to execute compared to network-layer attacks. They exploit the disparity between the minimal effort needed to send a request and the significant resources required by the server to process it.

Common Techniques:

HTTP Flooding: Overwhelming a server with HTTP requests.

Slowloris: Keeping many connections open by sending partial HTTP requests.

Low and Slow Attacks: Sending data at a slow rate to tie up server resources.

Challenges in Mitigation: Since these attacks often appear as normal traffic, advanced tools like Web Application Firewalls (WAFs) and behavioral analysis are needed to detect and block them.