$ ctf42

#fastbin CTF challenges

5 CTF challenges using fastbin from 5 CTFs (2018–2020), 5 with writeups.

Misc · 5

Often combined with

#tcache-dup 1 #file-structure-attack 1 #free-hook 1 #unsorted-bin-leak 1 #off-by-one 1 #use-after-free 1 #heap-overlap 1 #realloc-zero-size-free 1 #double-free 1

Challenges

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Challenge CTF Weight Category Has
houseofAtum
#tcache-dup#fastbin#file-structure-attack
 BCTF 2018 – Misc files wu 3
heap_heaven_2
#fastbin
 Hack.lu 2018 72.75 Misc files wu 3
EncryptionService
#use-after-free (uaf)#fastbin#heap-overlap
 UTCTF 2019 – Misc files wu 2
invisible
#realloc-zero-size-free#double-free#fastbin
 ASIS 2020 Quals 64.97 Misc files wu 1
BabyFactory
#off-by-one#fastbin#unsorted-bin-leak#free-hook
 PwnThyBytes 2019 25.00 Misc files wu 1