$ ctf42

#fastbin-dup CTF challenges

6 CTF challenges using fastbin-dup from 5 CTFs (2017–2023), 6 with writeups. Mostly Pwn (67%) and Misc (33%).

Pwn · 4 Misc · 2

Often combined with

#double-free 5 #malloc-hook-overwrite 2 #stdout-vtable 1 #fsop 1 #overlapping-chunks 1 #off-by-one 1 #got-overwrite 1 #format-string 1

Challenges

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Challenge CTF Weight Category Has
secure_keymanager
#double-free#fastbin-dup#format-string#got-overwrite
 SECCON 2017 Quals 30.00 Misc files wu 3
mailman
#fastbin-dup
 ImaginaryCTF 2023 34.52 Pwn files wu 2
BabyHeap
#off-by-one#double-free#fastbin-dup#malloc-hook-overwrite
 0CTF 2018 Quals – Pwn files wu 1
easiest
#fastbin-dup#double-free#stdout-vtable#fsop
 BCTF 2018 – Misc files wu 1
freenote2018
#double-free#fastbin-dup#overlapping-chunks#malloc-hook-overwrite
 0CTF 2018 Finals – Pwn files wu 1
babyjeep
#double-free#fastbin-dup
 BlueHens 2021 22.62 Pwn files wu 1