$ ctf42

#arbitrary-write CTF challenges

15 CTF challenges using arbitrary-write from 12 CTFs (2018–2023), 15 with writeups. Mostly Pwn (53%) and Misc (47%).

Pwn · 8 Misc · 7

Often combined with

#format-string 3 #shellcode 2 #linked-list 1 #argument-count-mismatch 1 #heap 1 #jit-compiler 1 #wx-memory 1 #double-free 1 #got-overwrite 1 #custom-heap 1 #oracle 1 #use-after-free 1 #swap-primitive 1 #pointer-overwrite 1 #hook-overwrite 1

Challenges

Filter and sort these in the challenge browser →

Challenge CTF Weight Category Has
tinyfs
#use-after-free (uaf)#arbitrary-write
 TSG 2023 – Pwn files wu 3
sloader
#shellcode#arbitrary-write
 TSG 2023 – Pwn files wu 3
kill_shot
#format-string#arbitrary-write#seccomp#rop#orw
 Securinets 2021 Quals 41.71 Pwn files wu 3
swap_returns
#arbitrary-write#swap-primitive
 TokyoWesterns 2018 – Misc files wu 3
detective
#arbitrary-write#oracle
 TSG 2020 – Misc files wu 3
trick_or_treat
#arbitrary-write
 HITCON 2019 Quals 92.94 Misc files wu 2
krypto
#kernel-exploit#toctou-race#arbitrary-write#modprobe-path-overwrite#infoleak
 CSAW 2021 Quals 20.54 Pwn files wu 1
jit-calc
#jit-compiler#wx-memory#arbitrary-write#shellcode
 RITSEC 2019 – Misc files wu 1
memsafed
#integer-underflow#arbitrary-write#stack-pivot#pie-leak
 zer0pts 2022 35.97 Pwn files wu 1
baby_mac
#heap-overflow#arbitrary-write#hook-overwrite
 WMCTF 2020 – Misc files wu 1
softshell
#heap#linked-list#argument-count-mismatch#arbitrary-write
 PatriotCTF 2023 24.52 Pwn files src wu 1
The_Calculator
#format-string#arbitrary-write
 X-MAS 2018 – Misc files wu 1
The_Calculator_2.0
#format-string#arbitrary-write
 X-MAS 2018 – Misc files wu 1
The_Mound
#custom-heap#double-free#arbitrary-write#got-overwrite
 RaRCTF 2021 24.53 Pwn files wu 1
suckless2
#arbitrary-write#pointer-overwrite
 UMassCTF 2021 23.56 Pwn files wu 1