2023weight 35.00LINE CTF

LINE CTF 2023

4 challenges with 6 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

Another Secure Store Note
322 pts1 writeup
- xss
Same technique in picoCTF: notepad, noted, Client-side-again
Memento
500 pts1 writeup
- web
- exceptions
- java
Same technique in picoCTF: Java Code Analysis!?!, Client-side-again, dont-use-client-side

Binary exploitation1

Turn a memory-safety bug in a native binary into control of execution. Usually a stack overflow, a format string, or a heap primitive.

Solve it with:ROP gadget finder Shellcode assembler and library Cyclic pattern generator and offset finder Format string exploit builder Learn: Binary exploitation

Hackatris
341 pts3 writeups
- pwn
Same technique in picoCTF: Guessing Game 1, x-sixty-what, format string 3

Misc1

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

Baby Simple GoCurl
1 writeup
Same technique in picoCTF: Permissions, Specialer, Codebook

Web2

Another Secure Store Note

Memento

Binary exploitation1

Hackatris

Misc1

Baby Simple GoCurl

Other 2023 events