Thilan Dissanayaka Exploit development Apr 12, 2026

Exploiting a heap buffer overflow in linux

In the previous article, we dissected glibc's malloc — chunks, bins, tcache, coalescing, and the metadata that holds it all together. Now we break it.

Heap exploitation is fundamentally different from stack exploitation. On the stack, the goal is clear: overwrite the return address, control EIP. On the heap, there's no return address to overwrite. Instead, we corrupt the allocator's metadata to trick malloc() into returning a pointer to memory we want to control — a function pointer, a GOT entry, a vtable, or any other target.

Out of Band SQL Injection

Out of Band SQL Injection (OOB SQLi) is an advanced SQL injection technique where the attacker cannot retrieve data directly through the same communication channel used to send the injection payload....

Jan 27 Software Architecture

Singleton Pattern explained simply

Ever needed just one instance of a class in your application? Maybe a logger, a database connection, or a configuration manager? This is where the Singleton Pattern comes in — one of the simplest but...

Apr 12 Exploit development

Exploiting a heap buffer overflow in linux

In the [previous article](/heap-internals-how-glibc-malloc-works/), we dissected glibc's malloc — chunks, bins, tcache, coalescing, and the metadata that holds it all together. Now we break...

Apr 12 Exploit development

Exploiting a Stack Buffer Overflow on Windows

In a previous tutorial we discusses how we can exploit a buffer overflow vulnerability on a Linux machine. I wen through all theories in depth and explained each step. Now today we are going to jump...

Feb 10 Application Security

SQL Injection Login Bypass

SQL Injection (SQLi) is one of the oldest and most fundamental web application vulnerabilities. While modern frameworks have made it harder to introduce, understanding SQL injection is essential for anyone learning web security. In this post, we'll break it down from the ground up using a classic login bypass.

May 07 Pet Projects

How I built a web based CPU Simulator

As someone passionate about computer engineering, reverse engineering, and system internals, I've always been fascinated by what happens "under the hood" of a computer. This curiosity led me to...