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November 2017

[hxp CTF 2017] Babyish Write-up (Pwn100)

Please hack. Download: 917b8036bb39196f6a9388b9140eb322331406d1949f1af372fde87a5a5b1aff.tar.xz Connection: nc 35.198.98.140 45067 We are given some files including the source code of the vulnerable binary and the libc file from the server.

Let’s start with reading the source code.

It reads our… Continue Reading →

[HITCON CTF 2017 Quals] Start Write-up (Pwn132)

Have you tried pwntools-ruby? nc 54.65.72.116 31337 start-7a3715a6bd61783850f9c109dbc57571.zip We are given two files. A server code written in ruby and an ELF binary which is statically linked.

Let’s look at the ruby script first.

It says ‘The binary “start”… Continue Reading →

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