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One post tagged with "GDB PEDA"

GDB PEDA (Persistent Exploit Developer And Attacker) is an interactive shell for GDB, a popular debugger. It provides a set of powerful tools and features that simplify the process of exploiting vulnerabilities in binaries, including automatic detection of memory corruption, calculation of offsets, and execution of malicious code. With PEDA, exploit developers can quickly analyze and exploit bugs, making it an essential tool for penetration testers and security researchers.

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HTB | You know 0xDiablos | Write-Up

· 22 min read

Summary:​

We prepare for a challenge by preparing challenge files and testing the executable. Next, we perform static analysis using Ghidra to identify potential vulnerabilities. Upon discovering a buffer overflow vulnerability, we verify its existence and proceed to analyze the target architecture and endianness using pwntools' checksec feature.

With this information in hand, we use GDB and PEDA to identify the offset and address of the flag() function. We then craft a malicious payload using pwntools to smash the stack and exploit the vulnerability. Before submitting the exploit to the target machine, we verify its effectiveness against a local copy of the executable. After successfully exploiting the target, we submit our exploit and grab the recovered flag, declaring Challenge Completed once the task is accomplished.

Challenge Name: You know 0xDiablos | Difficulty: Easy | Category: Pwn