buffer overflow

Question

what is buffer overflow?can it attack to sql database or web site?and how can i defence of my website and database for buffer overflow?

Lalit M · Answer

A buffer overflow occurs when a program or process tries to store more data in a buffer (temporary data storage area) than it was intended to hold. Since buffers are created to contain a finite amount of data the extra information - which has to go somewhere - can overflow into adjacent buffers corrupting or overwriting the valid data held in them. Although it may occur accidentally through programming error buffer overflow is an increasingly common type of security attack on data integrity . In buffer overflow attacks the extra data may contain codes designed to trigger specific actions in effect sending new instruction s to the attacked computer that could for example damage the user's files change data or disclose confidential information. Buffer overflow attacks are said to have arisen because the C programming language supplied the framework and poor programming practices supplied the vulnerability. how to work more info