API attacks are becoming more prevalent, posing new security risks for organizations that rely on these connections to share data and functionality. As companies continue to expose a growing number of website APIs to the internet, threat actors are increasingly targeting these vulnerable points of entry.
An API, or application programming interface, allows software to communicate with other software systems. For example, an API may enable a user to log in to an application using credentials from a third-party account like Facebook or Google. API keys act as passwords, authorizing connections between software programs and verifying access permissions.
API attacks are similar to traditional website-based cyberattacks, as both involve sending access requests that can be compromised by malicious actors. Some common types of API attacks include injection attacks, broken access control attacks, excessive data exposure, DoS and DDoS attacks, and third-party attacks.
Injection attacks occur when cybercriminals insert malicious code into API queries to gain unauthorized access to sensitive data. Broken access control attacks exploit security vulnerabilities in APIs to bypass standard access controls and potentially lead to data breaches. Excessive data exposure can occur when organizations expose too many APIs to the internet or send back too much information in response to requests.
DoS and DDoS attacks can overwhelm APIs with a large volume of data, causing the entire system to become unresponsive. Third-party attacks target APIs through trusted partners with legitimate API keys, allowing hackers to access the target API through compromised third parties.
To defend against API attacks, organizations should follow application security best practices and deploy appropriate cybersecurity measures. This includes sanitizing query parameters to prevent XSS and SQL injection attacks, implementing strong authentication and authorization mechanisms, and protecting against DoS and DDoS attacks with security software.
Maintaining an accurate inventory of exposed APIs, managing access permissions for third-party organizations and users, and limiting the amount of information returned by APIs are also crucial steps in mitigating API vulnerabilities. By taking proactive measures to secure their APIs, organizations can better protect themselves against the growing threat of API attacks in an increasingly interconnected digital world.