{"id":148,"date":"2023-06-28T06:26:52","date_gmt":"2023-06-28T06:26:52","guid":{"rendered":"http:\/\/localhost\/embeddedwala\/?p=148"},"modified":"2023-07-27T04:16:04","modified_gmt":"2023-07-27T04:16:04","slug":"understanding-buffer-overflow-and-stack-smashing","status":"publish","type":"post","link":"https:\/\/embeddedwala.com\/beta\/blogs\/embedded-c\/understanding-buffer-overflow-and-stack-smashing\/","title":{"rendered":"Understanding Buffer Overflow and Stack Smashing"},"content":{"rendered":"\t\t
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<\/span>1. Introduction<\/strong><\/span><\/h2><\/div>
Buffer overflow<\/strong>\u00a0and\u00a0stack smashing<\/strong>\u00a0are two types of vulnerabilities that can be exploited by hackers to compromise a computer system. These attacks occur\u00a0when an attacker can write data beyond the intended boundaries of a buffer<\/strong>, resulting in a violation of the integrity of the system. In this article, we will delve into the details of buffer overflow and stack smashing, explore their implications, and outline ways to prevent them.<\/div>
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<\/span>2. What is a Buffer Overflow?<\/strong><\/span><\/h2><\/div>
A buffer overflow occurs when a program tries to store data beyond the memory allocated to a buffer<\/strong>. Buffers are temporary storage areas used by a program to hold data before it is processed. When the buffer is filled beyond its allocated memory, the extra data overwrites other parts of the memory,\u00a0potentially damaging or corrupting the system<\/strong>. Hackers can exploit this vulnerability by\u00a0overwriting critical data<\/strong>, such as program code, system memory, or even the return address of a function call.<\/div>

<\/span>3. What is Stack Smashing?<\/strong><\/span><\/h2><\/div>
Stack smashing is a type of buffer overflow that specifically targets the stack, which is a region of memory used for storing local variables and function calls.<\/strong>\u00a0In a stack smashing attack,\u00a0an attacker overwrites the return address of a function call<\/strong>\u00a0with the address of a malicious code or a pointer to a shellcode. When the function returns, the malicious code is executed, leading to a system compromise.<\/div>

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Table of Contents<\/p>\n