$ ctf42

#fastbin-attack CTF challenges

8 CTF challenges using fastbin-attack from 8 CTFs (2017–2025), 8 with writeups. Mostly Misc (62%) and Pwn (38%).

Misc · 5 Pwn · 3

Often combined with

#malloc-hook 4 #off-by-one 4 #double-free 3 #overlapping-chunks 1 #heap-overflow 1 #mmap-chunk 1 #unsorted-bin 1 #setcontext 1 #largebin-attack 1 #fsop 1 #c++ 1 #heap-uaf 1 #libc-leak 1 #vtable-hijack 1 #use-after-free 1

Challenges

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Challenge CTF Weight Category Has
stringer
#off-by-one#double-free#mmap-chunk#fastbin-attack#malloc-hook
 RCTF 2018 – Misc files wu 3
auir
#heap-uaf#double-free#fastbin-attack#libc-leak#c++
 CSAW 2017 Quals 24.61 Misc files src wu 3
Diary
#heap-overflow#fastbin-attack#overlapping-chunks#malloc-hook
 Balsn 2020 25.00 Misc files wu 3
video_player
#use-after-free (uaf)#fastbin-attack#vtable-hijack#malloc-hook
 SECCON 2017 Quals 30.00 Misc files wu 2
duet
#off-by-one#largebin-attack#fastbin-attack#fsop#setcontext
 0CTF 2020 Quals – Pwn files wu 1
Refreshments
#off-by-one#fastbin-attack#unsorted-bin
 StackSmash 2025 24.00 Pwn files wu 1
snake
#off-by-one#fastbin-attack#malloc-hook
 SCTF 2020 – Misc files wu 1
LogService
#double-free#fastbin-attack
 TeamItaly 2023 24.88 Pwn files wu 1