Add gdb watch point and find out where canary override happens. Find where stack canary is stored on stack. The stack corruption always looks the same: and spot the function where stack is corrupted. These exploits were extremely common 20 years ago, but since then, a huge amount of effort has gone into mitigating stack-based overflow attacks by operating system developers, application. How to debug stack smashing violations? This is a step-by-step guide to debug stack smashing violations. Stack-based buffer overflow exploits are likely the shiniest and most common form of exploit for remotely taking over the code execution of a process. To solve this, you need to make sure that array a contains enough space to hold both the first and second string concatenated together. How do I fix stack smashing? This is the reason you're getting the "stack smashing" issue because you're trying to access memory which does not belong to your process. This can have serious consequences for the reliability and security of a program. What is stack smashing and how to avoid it? Stack smashing occurs when a buffer overflow overwrites data in the memory allocated to the execution stack. This is a security mechanism implemented by gcc/g++ to prevent buffer overflow exploits using -fstack-protector. Info about Stack Smashing In C What is stack smashing detected in C++? *** stack smashing detected *** error occurs when as the name suggests, you smash the stack, meaning that you have a buffer overflow and the canary gets overwritten by a different value.
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