$ ctf42

Challenges

Category
Difficulty
CTFtime weight
–
Higher weight ≈ harder, more prestigious event.
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Must have
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22 challenges · browse all techniques

Challenge CTF Weight Category Has
bf
#off-by-one#cpp-string#arbitrary-read-write
 RCTF 2020 – Misc files wu 1
mginx
#stack-buffer-overflow#mips64#shellcode
 RCTF 2020 – Misc files wu 1
no_write
#syscall-filter#strncmp-oracle#stack-pivot
 RCTF 2020 – Misc files wu 1
note
#negative-index#tcache-poisoning#malloc-hook#one-gadget
 RCTF 2020 – Misc files wu 2
vm
#custom-vm#missing-bounds-check#arbitrary-read-write
 RCTF 2020 – Misc files wu 1
ManyNotes
#house-of-orange#thread-arena#tcache-poisoning#one-gadget
 RCTF 2019 – Misc files wu 2
babyheap
#house-of-storm#setcontext#unsorted-bin-attack
 RCTF 2019 – Misc files wu 2
chat
#double-free#tcache-poisoning#got-overwrite
 RCTF 2019 – Misc files wu 2
shellcoder
#shellcode#memfd-create#execveat
 RCTF 2019 – Misc files wu 3
syscall_interface
#srop#sigreturn#personality#shellcode
 RCTF 2019 – Misc files wu 1
Rnote4
#no-relro#got-overwrite#heap
 RCTF 2018 – Misc files wu 2
babyheap
#off-by-one#null-byte-poisoning#malloc-hook
 RCTF 2018 – Misc files wu 3
rnote3
#uninitialized-stack#overlapping-chunks#free-hook
 RCTF 2018 – Misc files wu 3
simple_vm
#custom-vm#bytecode-reversing
 RCTF 2018 – Misc files wu 2
simulator
#custom-vm#mips-assembly#arbitrary-read-write
 RCTF 2018 – Misc files wu 2
stringer
#off-by-one#double-free#mmap-chunk#fastbin-attack#malloc-hook
 RCTF 2018 – Misc files wu 3
0c RCTF 2020 – Misc files wu 1
Asgard_Fallen_Down RCTF 2025 – Misc files
Shadows_of_Asgard RCTF 2025 – Misc files
Speak_Softly_Love RCTF 2025 – Misc files
Wanna_Feel_Love RCTF 2025 – Misc files
vault RCTF 2025 – Misc files