2023weight 0.00@HackDay

HackDay Qualifications 2023

4 challenges with 7 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 CTFtime

Misc3

Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.

Solve it with:Brainfuck and esolang decoder Cipher identifier and automatic decoder Regex tester with match offsets and capture groups Learn: Recognising encodings

Diamond
453 pts1 writeup
Also written up in: 0x0918/Writeups
- web3
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
Disclosure
417 pts1 writeup
Also written up in: 0x0918/Writeups
- web3
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
Gate
342 pts1 writeup
Also written up in: 0x0918/Writeups
- web3
Same technique in picoCTF: PW Crack 2, Permissions, Specialer

Web1

Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.

Solve it with:JWT decoder and signature verifier JWT alg=none bypass generator Web attack payload catalog JWT secret brute force Learn: Sessions, tokens and access control

Advocating for 2fa
312 pts1 writeup
- web
Same technique in picoCTF: Live Art, secure-email-service, No FA

Misc3

Diamond

Disclosure

Gate

Web1

Advocating for 2fa

Other 2023 events