$ ctf42

#fsop CTF challenges

10 CTF challenges using fsop from 9 CTFs (2018–2024), 10 with writeups. Mostly Misc (50%) and Pwn (50%).

Misc · 5 Pwn · 5

Often combined with

#file-structure 3 #malloc-hook-overwrite 1 #mmap-threshold-overwrite 1 #heap 1 #double-free 1 #fastbin-dup 1 #stdout-vtable 1 #file-struct-exploit 1 #libc-leak 1 #tcache-poisoning 1 #use-after-free 1 #fastbin-attack 1 #off-by-one 1 #setcontext 1 #largebin-attack 1

Challenges

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Challenge CTF Weight Category Has
success Securinets 2021 Quals 41.71 Pwn files wu 2
nullptr ALLES 2020 – Misc files wu 2
babyfile SECCON 2022 Quals 97.90 Pwn files wu 2
refcnt ASIS 2020 Finals 64.97 Misc files wu 1
duet 0CTF 2020 Quals – Pwn files wu 1
speedpwn SekaiCTF 2024 36.96 Pwn files wu 1
lazynote SECCON 2020 Quals 65.77 Misc files wu 1
house_of_tataru N1CTF 2021 53.54 Pwn files wu 1
butterfly DarkCTF 2020 23.71 Misc files wu 1
easiest BCTF 2018 – Misc files wu 1