2016from public repositories

Ncl Ctf Regular Season 2016

7 challenges with 7 published solutions between them. The writeups for this event were found in public repositories. Each link is pinned to the commit it was read from.

Where these writeups live

Uncategorised4

The upstream scoreboard did not say, so neither do we.

Solve it with:Cipher identifier and automatic decoder Learn: Recognising encodings

Checksums 125
1 official solution
Also written up in: vishwaraj/write-ups-2016
Compromise 100
1 official solution
Also written up in: vishwaraj/write-ups-2016
Cracking Hard 125
1 official solution
Also written up in: vishwaraj/write-ups-2016
Cracking Medium 120
1 official solution
Also written up in: vishwaraj/write-ups-2016

Binary exploitation2

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

EasySploit 80
1 official solution
Also written up in: vishwaraj/write-ups-2016
PyPass 25
1 official solution
Also written up in: vishwaraj/write-ups-2016

Cryptography1

Recover a plaintext or a key from something that was supposed to protect it. In practice: identify the scheme, find the parameter the author got wrong, exploit it.

Solve it with:Cipher identifier and automatic decoder Vigenere cipher solver with automatic key recovery RSA decryption and attack runner Wiener’s attack on small RSA private exponents In-browser hash cracker with rule transforms Learn: Classical ciphers and frequency analysis Learn: RSA and the parameters that break it

Passwords 1 75
1 official solution
Also written up in: vishwaraj/write-ups-2016

Uncategorised4

Checksums 125

Compromise 100

Cracking Hard 125

Cracking Medium 120

Binary exploitation2

EasySploit 80

PyPass 25

Cryptography1

Passwords 1 75

Other 2016 events