Improper Rate Limiting
Overview
Improper rate limiting occurs when a system fails to adequately restrict the number of requests or actions a user or client can perform within a given timeframe. This weakness arises when controls designed to prevent excessive or abusive usage are missing, insufficient, or incorrectly implemented.
Why It Matters
- Security impact: It enables attackers to perform denial-of-service attacks, brute force attempts, or resource exhaustion, compromising system availability and integrity.
- Business risk: Excessive resource consumption can lead to degraded service performance, increased operational costs, and damage to reputation.
- Common consequences: Service outages, unauthorized access through credential stuffing, and increased vulnerability to automated attacks.
Where It Appears
- Environments: Web applications, APIs, authentication services, and network infrastructure.
- Systems or processes: Login mechanisms, transaction processing, data retrieval endpoints, and rate-sensitive functionalities.
- Typical conditions: High traffic volumes, automated attack attempts, or lack of request throttling mechanisms.
How It Is Exploited (High Level)
Attackers exploit improper rate limiting by sending a large number of requests or actions in a short period to overwhelm the system, bypass security controls, or gain unauthorized access through repeated attempts.
How It Is Addressed (High Level)
Mitigation involves implementing effective rate limiting controls, such as request throttling, quotas, and monitoring to detect and block excessive usage patterns. These controls fall under access control and resource management categories.
Related Topics
Denial of Service (DoS), Brute Force Attacks, Authentication Bypass, Resource Exhaustion, Access Control, Throttling, API Security