2019weight 25.00HackingForSoju

Midnight Sun CTF 2019 Finals

4 challenges with 5 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

Web2

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: Web attacks and session tokens

Marcololo
900 pts2 writeups
- xss
- web
Same technique in picoCTF: notepad, noted, Client-side-again
icanhazfile
1003 pts1 writeup
- web
- pwned
Same technique in picoCTF: Client-side-again, dont-use-client-side, Irish-Name-Repo 3

Reverse engineering2

Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.

Solve it with:Strings extractor for binaries and blobs WebAssembly disassembler Java .class disassembler Python .pyc bytecode disassembler Learn: Binary exploitation

Devious Digital Device
1 writeup
- reversing
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
pytte1337en
1 writeup
- rev
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300

Web2

Marcololo

icanhazfile

Reverse engineering2

Devious Digital Device

pytte1337en

Other 2019 events