Shellcode is part of the payload in the exploitation of a software vulnerability to take control of or exploit a compromised machine. Common shellcode objectives include installing a rootkit or Trojan ...

A buffer overflow or overrun is a memory safety issue where a program does not properly check the boundaries of an allocated fixed-length memory buffer and writes more data than it can hold. This ...

Curl, or better known as cURL, is an open-source utility for sending or receiving files using URL syntax. In 2002, a buffer overflow was discovered in versions 6-7.4 of this software. This utility was ...

A few weeks ago, we published a challenge relating to the exploitation of a simple buffer overflow in Linux. In the published solution, it was noted how it was possible to change the execution flow of ...

A buffer overflow occurs when a program or process attempts to write more data to a fixed-length block of memory, or buffer, than the buffer is allocated to hold. Buffers contain a defined amount of ...

A buffer overflow occurs when a program writes beyond the end of a buffer (bounded array). In this chapter, we will focus on understanding vulnerabilities and writing exploits. We will also write ...