CHALLENGES(2021) CHALLENGES(2021)

Note

Some challenges were hosted on our infrastructure. They are now available as Docker images which you can download and run on your own computer. If you want to solve the challenges in the same way as the participants of the CTF, you should treat these Docker instances as blackboxes and avoid peeking in them.

All zipped challenges should include some solution or explanation.

Rules

https://blockctf.com/2021/rules.html

Challenges

*

├──┬── one: its just an xor
│  │
│  ├── reversing
│  │
│  └── points: 150




├──┬── two: Im a credential ghoul
│  │
│  ├── cryptography
│  │
│  └── points: 300




├──┬── three: Out Of Cash
│  │
│  ├── exploitation
│  │
│  └── points: 300




├──┬── four: Korean Space Program
│  │
│  ├── web
│  │
│  └── points: 150




├──┬── five: Memory Safe Hex Decode
│  │
│  ├── reversing
│  │
│  └── points: 200




├──┬── six: Card Theft
│  │
│  ├── exploitation
│  │
│  └── points: 100




├──┬── seven: Huge Primes
│  │
│  ├── web
│  │
│  └── points: 50




├──┬── eight: collatzeral damage
│  │
│  ├── cryptography
│  │
│  └── points: 200




├──┬── nine: Burnt Bread
│  │
│  ├── exploitation
│  │
│  └── points: 200




├──┬── ten: Gil Triangle
│  │
│  ├── exploitation
│  │
│  └── points: 200




├──┬── eleven: Memory Safe Strcmp
│  │
│  ├── reversing
│  │
│  └── points: 100

			

Results

https://blockctf.com/2021/results.html

See also

Work_at_Square(1), Privacy_policy(1), Code_of_conduct(1)

Block, Inc. (c) CHALLENGES(2021)