DCTF 2021
39 challenges with 161 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 CTFtimeMisc16
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
Bad Apple
12 writeupsSame technique in picoCTF: Permissions, Specialer, Codebook
Strong password
8 writeupsSame technique in picoCTF: Permissions, Specialer, Codebook
Don't let it run
7 writeupsSame technique in picoCTF: Permissions, Specialer, Codebook
Dragon
7 writeupsSame technique in picoCTF: Permissions, Specialer, Codebook
- misc
Same technique in picoCTF: Permissions, Specialer, Codebook
Julius’ ancient script
7 writeupsSame technique in picoCTF: Permissions, Specialer, Codebook
Hidden message
6 writeupsSame technique in picoCTF: Permissions, Specialer, Codebook
Leak Spin
6 writeupsSame technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
- misc
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Behind the scenes
3 writeupsSame technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
- misc200
Same technique in picoCTF: Permissions, Specialer, Codebook
Tiny interpreter
2 writeupsSame technique in picoCTF: Permissions, Specialer, Codebook
Forgotten secret
1 writeupSame technique in picoCTF: Permissions, Specialer, Codebook
Binary exploitation8
Turn a memory-safety bug in a native binary into control of execution. Usually a stack overflow, a format string, or a heap primitive.
- pwn
Same technique in picoCTF: Guessing Game 1, x-sixty-what, format string 3
- bof
- pwn
- rop
Same technique in picoCTF: Guessing Game 1, x-sixty-what, handoff
- bof
- pwn
- ret2win
- rop
Same technique in picoCTF: Guessing Game 1, x-sixty-what, handoff
- bof
- ret2libc
- pwn
- rop
Same technique in picoCTF: Guessing Game 1, x-sixty-what, handoff
- pwn
Same technique in picoCTF: format string 3, Binary Gauntlet 2, Binary Gauntlet 3
- fini_array
- pwn
- write-what-where
Same technique in picoCTF: Guessing Game 1, x-sixty-what, format string 3
- pwn
Same technique in picoCTF: Guessing Game 1, x-sixty-what, format string 3
- heap
- pwn
Same technique in picoCTF: tea-cash, sice_cream, zero_to_hero
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.
- crypto
Same technique in picoCTF: StegoRSA, Timestamped Secrets, AES-ABC
- crypto
Same technique in picoCTF: StegoRSA, Timestamped Secrets, AES-ABC
- crypto
Same technique in picoCTF: StegoRSA, Timestamped Secrets, AES-ABC
- crypto
Same technique in picoCTF: StegoRSA, Timestamped Secrets, AES-ABC
Private Encryption Mistake
1 writeupSame technique in picoCTF: StegoRSA, Timestamped Secrets, AES-ABC
Web5
Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.
Simple web
10 writeupsSame technique in picoCTF: Client-side-again, dont-use-client-side, Irish-Name-Repo 3
- web
Same technique in picoCTF: Client-side-again, dont-use-client-side, Irish-Name-Repo 3
- web
Same technique in picoCTF: Client-side-again, dont-use-client-side, Irish-Name-Repo 3
- web
- ssti
Same technique in picoCTF: Bithug, Startup Company, SSTI2
Secure Api
3 writeupsSame technique in picoCTF: Client-side-again, dont-use-client-side, Irish-Name-Repo 3
Reverse engineering5
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
- rev
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
- reverse
- engineering
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
- rev
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
- rev
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
- reversing
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300