2019weight 100.000ops, eee

0CTF/TCTF 2019 Finals

6 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

Binary exploitation3

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

BabyHeap-2.29
250 pts1 writeup
- pwn
Same technique in picoCTF: Guessing Game 1, x-sixty-what, format string 3
Embeded heap
1000 pts1 writeup
- mips
- pwn
- heap
- uclibc
Same technique in picoCTF: tea-cash, sice_cream, zero_to_hero
Fast&Furious
250 pts1 writeup
- kernel
- kpti
Same technique in picoCTF: Guessing Game 1, x-sixty-what, format string 3

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

114514 CALCALCALC
1 writeup
Same technique in picoCTF: Permissions, Specialer, Codebook
TCTF Hotel Booking System
1 writeup
Same technique in picoCTF: Permissions, Specialer, Codebook
Wallbreaker (not very) Hard
1 writeup
Same technique in picoCTF: Permissions, Specialer, Codebook

Binary exploitation3

BabyHeap-2.29

Embeded heap

Fast&Furious

Misc3

114514 CALCALCALC

TCTF Hotel Booking System

Wallbreaker (not very) Hard

Other 2019 events