0CTF/TCTF 2020 Finals
15 challenges with 30 published community solutions between them. Solution links go to CTFtime’s task page, which aggregates every writeup for a challenge - individual blog posts rot, the aggregator does not.
Full task list on CTFtimeUncategorised11
The upstream scoreboard did not say, so neither do we.
Baby Bypass
4 official solutionsAlso written up in: pr0cf5/CTF-writeups, ch0rse/CTF-writeups, pr0cf5/CTF-writeups, ch0rse/CTF-writeups
Also written up in: jimmyl02/ctf-writeups, jimmyl02/ctf-writeups
Amp2020
2 official solutionsAlso written up in: zsxsoft/my-ctf-challenges, zsxsoft/my-rctf-2018
Chromium Rce
2 official solutionsAlso written up in: Lanph3re/ctf, Lanph3re/ctf
Chromium Sbx
2 official solutionsAlso written up in: Lanph3re/ctf, Lanph3re/ctf
Also written up in: Jinmo/ctfs, shift-crops/CTFWriteups
Also written up in: yuawn/CTF, ssspeedgit00/CTF
Also written up in: Jinmo/ctfs, Jinmo/ctfs
BabyHeap 2020
1 official solutionAlso written up in: shift-crops/CTFWriteups
Emoji
1 official solutionAlso written up in: jt00000/ctf.writeup
Pwnit
1 official solutionAlso written up in: mephi42/ctf
Binary exploitation3
Turn a memory-safety bug in a native binary into control of execution. Usually a stack overflow, a format string, or a heap primitive.
Also written up in: hxp.io, hxp.io
- pwn
- heap
Same technique in picoCTF: vr-school, sice_cream, zero_to_hero
Also written up in: mephi42/ctf, mephi42/ctf
- unicode
- glibc
- pwn
Same technique in picoCTF: lockdown-horses, Guessing Game 1, Bizz Fuzz
Also written up in: mephi42/ctf
- shellcode
- sgx
- pwn
Same technique in picoCTF: handoff, Binary Gauntlet 2, Kit Engine
Cryptography1
Recover a plaintext or a key from something that was supposed to protect it. In practice: identify the scheme, find the parameter the author got wrong, exploit it.
- rsa
- crypto
Same technique in picoCTF: It's Not My Fault 2, StegoRSA, john_pollard