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Since the introduction of the Internet, users have faced cyberthreats聽of many different varieties. However, in the last decade, there has been a frontrunner in cyberattacks: buffer overflow attacks. Hackers discovered that programs could be easily accessed and manipulated through buffer overflow vulnerabilities, and these attacks became a common cyberthreat. To really understand the problem with buffer overflow attacks and their implications, you must first get a grasp of buffer overflow vulnerabilities.

What is a buffer overflow vulnerability?
Picture a temporary storage unit used to hold your extra stuff when you are moving. Your storage unit is only capable of holding so many things before it fills up and your personal items begin to tumble out and cause problems for everyone else in the storage facility. The same goes for buffers. They are designed to hold a small amount of data, and when they reach capacity, bits of the data being transferred聽may be forced out onto another buffer, which may corrupt the data that is currently in that buffer. The vulnerability exists when a program or process is not designed to sort data accordingly into buffers without creating overflow.

Why are buffer overflow vulnerabilities聽cyberthreats?
According to an article by the Oregon Graduate Institute of Science & Technology鈥檚 Department of Computer Science and Engineering, 鈥渂uffer overflow vulnerabilities dominate in the area of remote network penetration vulnerabilities, where an anonymous Internet user seeks to gain partial or total control of a host.鈥� According to Tech Target, hackers will often聽insert extra data encoded with specific instructions. This extra data floods the buffers, causing an overage and compromising the integrity of the original聽data. The implemented data has now infiltrated the majority of the buffers, giving the hacker the capability to access other files on the network, manipulate programming or delete important data. Many cyberexperts believe that buffer overflow attacks are so common because they are comparatively simple to carry out and difficult to trace.

Defenses against buffer overflow attack
Though program vulnerability sometimes slip by unnoticed until an attack is made, the following are several precursory defensive steps security programmers can take to prevent a buffer overflow attack.

-Pay close attention when writing code:
Computer code writers often get in a rhythm that can lead to mistakes. Take frequent breaks when writing code, especially when working with a C series program, to avoid making penetrable mistakes. It is always a good idea to check over your code several times and ask for an extra glance from another coder to correct preventable buffer overflow vulnerabilities.

-Program non-executable buffers:
This type of buffer prevents corrupted data from being able to perform its nefarious attacks. Some types of non-executable buffers may limit program compatibility, but there are many that will not interfere with universality and will still protect the program鈥檚 integrity. These include聽GCC Trampolines and signal delivery.

-Array bounds checking:
This form of range checking can sense variabilities聽in the system鈥檚 programming and processes. If an array bounds check detects an altered segment of data, it will stop the program completely, preventing the corrupted data from enacting its mal-intended processes.

You can learn more about the implications of buffer overflow attacks by tuning into the National Cybersecurity Institute鈥檚 webinar entitled, 鈥淏uffer Overflows 鈥� Wreaking Havoc with Stack Corruption.鈥� Buffer overflows are just like old filing systems. When a container got too full, the contents would spill out.聽Though program vulnerability sometimes slip by unnoticed until an attack is made, there are several precursory defensive steps security programmers can take to prevent a buffer overflow attack.

Because buffer overflow attacks are so common, it is crucial that information security professionals are informed about them and how to defend their networks from the threat. Educational facilities like the offer that can train people to handle cyberthreats like these and many more.

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