0CTF/TCTF 2021 Finals
23 challenges with 43 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 CTFtimeUncategorised12
The upstream scoreboard did not say, so neither do we.
Babalogin
7 official solutionsAlso written up in: hzqmwne/my-ctf-challenges, hzqmwne/my-ctf-challenges, hzqmwne/my-ctf-challenges, hzqmwne/my-ctf-challenges, hzqmwne/my-ctf-challenges, hzqmwne/my-ctf-challenges, hzqmwne/my-ctf-challenges
Soracon
6 official solutionsAlso written up in: zsxsoft/my-ctf-challenges, zsxsoft/my-rctf-2018, zsxsoft/my-ctf-challenges, zsxsoft/my-ctf-challenges, zsxsoft/my-rctf-2018, zsxsoft/my-rctf-2018
buggyLoader
4 official solutionsAlso written up in: waderwu/My-CTF-Challenges, waderwu/My-CTF-Challenges, waderwu/My-CTF-Challenges, waderwu/My-CTF-Challenges
1linephp
3 official solutionsAlso written up in: waderwu/My-CTF-Challenges, waderwu/My-CTF-Challenges, waderwu/My-CTF-Challenges
ezMat
2 official solutionsAlso written up in: qwaz/solved-hacking-problem, qwaz/solved-hacking-problem
Aes Private
1 official solutionAlso written up in: hzqmwne/my-ctf-challenges
Aes Whitebox
1 official solutionAlso written up in: hzqmwne/my-ctf-challenges
Aes Whitebox Compiler
1 official solutionAlso written up in: hzqmwne/my-ctf-challenges
Babylogin
1 official solutionAlso written up in: hzqmwne/my-ctf-challenges
ezRSA
1 official solutionAlso written up in: qwaz/solved-hacking-problem
Secret
1 official solutionAlso written up in: hzqmwne/my-ctf-challenges
Win Win
1 official solutionAlso written up in: w181496/CTF
Cryptography5
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.
Also written up in: qwaz/solved-hacking-problem, kokifish/CTF-detailed-writeups
2021 TCTF final ezMat wp
1 official solutionAlso written up in: kokifish/CTF-detailed-writeups
2021 TCTF final ezRSA plus wp
1 official solutionAlso written up in: kokifish/CTF-detailed-writeups
2021 TCTF final ezRSA wp
1 official solutionAlso written up in: kokifish/CTF-detailed-writeups
PRNG zer0lfsr minus
1 official solutionAlso written up in: kokifish/CTF-detailed-writeups
Binary exploitation2
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: Jinmo/ctfs
- kernel
- pwn
Same technique in picoCTF: lockdown-horses, Guessing Game 1, Bizz Fuzz
Reverse engineering2
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
Also written up in: Jinmo/ctfs, Jinmo/ctfs, Jinmo/ctfs
FA51R RE
1 official solutionAlso written up in: Jinmo/ctfs
Web1
Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.
RevengePHP
1 writeupSame technique in picoCTF: Live Art, secure-email-service, No FA
Misc1
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
Same technique in picoCTF: PW Crack 2, Permissions, Specialer