API security
October 14, 2022 | Anoop K Singh
Common API vulnerabilities
Distributed Denial of service
API DDoS attacks are executed to overload an API service. Since each hacker sends normal traffic volumes, these attacks are difficult to detect.
SQL Injections and Data Attacks
With the right credentials, insiders and hackers can access any system or data. Examples include Data Extraction or Theft, Data Deletion or Manipulation, Data Injection, Malicious Code Injection, and Extreme Application Activity.
API security best practices
Authenticate
One of the most crucial components of API security is authentication. Always use secure authentication techniques like JWT or OAuth to confirm user identity.
Simple HTTP authentication should never be used as it sends fields without encryption.
Use API gateways
Always place an API behind a gateway. Since API gateways consolidate both security-related activities and useful business-related operations, this has various advantages.
Rate limitation, barring malicious clients, are all characteristics of API gateways.
Validate inputs
Specify the acceptable inputs in your API documentation.
Prior to doing any server-side data modification or writing data to the database, don’t forget to verify every input.
Prevent improper entry attempts
They can be:
Remote Code Execution (RCE)
SQL Injection
Cross-Site Scripting (XSS)
Sending API keys or other sensitive data in the URL is not advised. Always use the Authorization header for them.
Limit requests (Throttling)
You may avoid DoS/brute-force attacks by limiting the number of queries sent.
Unfortunately, DDoS assaults don’t respond well to this technique.
Output data
Only the relevant info should be returned. Take care not to return any delicate information, such as API keys or passwords.
Remove the x-powered-by and server headers from your HTTP response. Potential hackers may receive information from them.
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