A cybersecurity analyst is reviewing the code of a legacy web application and discovers a function handling user input without proper size checks, which can potentially allow more data than anticipated. What type of control should the analyst recommend to mitigate the risk associated with this vulnerability?
Enforce stricter password complexity requirements for user accounts.
Increase the size of the buffer to accommodate more data.
Upgrade the cryptographic algorithms used by the application.
Implement input validation to enforce proper input size and content.
Implementing input validation is the correct measure to ensure that the size and type of user input is checked before processing. This control prevents attackers from exploiting buffer vulnerabilities by inputting data that can lead to buffer overflows. Input validation is a fundamental security control for protecting against various types of input-based vulnerabilities such as buffer overflows, SQL injections, and cross-site scripting. The other options, while important in their own right, do not directly address the issue of ensuring that input does not exceed buffer capacity or contain malicious data.
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