Which of the following can aid a buffer overflow attack to execute when used in the creation of applications?

Secure cookie storage involves protecting session tokens from theft and is not related to memory management vulnerabilities that lead to buffer overflows.

Standard libraries - particularly legacy C standard library functions like strcpy(), gets(), and sprintf() - do not enforce input length limits or perform bounds checking on memory writes, so when developers use these functions in application code, attackers can supply oversized input that overwrites adjacent memory regions, enabling code execution via buffer overflow.

State management refers to tracking application state across requests and sessions, which is unrelated to the memory boundary violations that cause buffer overflows.

Input validation is a defensive measure that prevents buffer overflows by rejecting malformed input before it reaches vulnerable code, so it reduces rather than aids such attacks.