---
title: "Discussion on \"Failed Exfil CTF Writeup: Exploiting Format Strings to Leak Stack Data\" | Hashnode"
description: "Discussion on \"Failed Exfil CTF Writeup: Exploiting Format Strings to Leak Stack Data\". Solve the Failed Exfil binary challenge by exploiting a format string vulnerability. Learn to analyze ELF binaries with Ghidra and leak stack secrets."
url: "https://hashnode.com/posts/failed-exfil-ctf-writeup-exploiting-format-strings-to-leak-stack-data/695600de0ccb194097b2263c"
---

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# [Failed Exfil CTF Writeup: Exploiting Format Strings to Leak Stack Data](https://ctfs.hashnode.dev/failed-exfil-ctf-writeup-exploiting-format-strings-to-leak-stack-data?utm_source=hashnode&utm_medium=feed)

Solve the Failed Exfil binary challenge by exploiting a format string vulnerability. Learn to analyze ELF binaries with Ghidra and leak stack secrets.

Jan 1 · 7 min read · ctfs.hashnode.dev  
Updated Jan 4  
Read the article

-   [#format-string-vulnerability](https://hashnode.com/tag/format-string-vulnerability)
-   [#stack-leak](https://hashnode.com/tag/stack-leak)
-   [#adventofctf](https://hashnode.com/tag/adventofctf)
-   [#ctf](https://hashnode.com/tag/ctf)
-   [#ctf-writeup](https://hashnode.com/tag/ctf-writeup)
-   [#capturetheflag](https://hashnode.com/tag/capturetheflag)
-   [#binary-exploitation](https://hashnode.com/tag/binary-exploitation)
-   [#ghidra](https://hashnode.com/tag/ghidra)
-   [#pwn](https://hashnode.com/tag/pwn)
-   [#pwntools](https://hashnode.com/tag/pwntools)
-   [#buffer-overfow](https://hashnode.com/tag/buffer-overfow)
-   [#elf-analysis](https://hashnode.com/tag/elf-analysis)

## Written by

[Null Siryn](https://hashnode.com/@nullsiryn)

@nullsiryn · Uttar Pradesh, India

  
[View profile](https://hashnode.com/@nullsiryn)

Read it. Don't Overthink it.

Barely Tame CTF Player. Debugging Addict. Worshipper of Wi-Fi Signals. Human? Depends on the Ping.

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