Category: Exploit Points: 300 64 bit ELF with Full RELRO, stack canary, NX enabled, No PIE. A quick run of the program: $ ./checker Hello! What is your name? NAME : 123 Do you know flag? >...

Category: pwn Points: 200 64 bit ELF, with all the protection enabled. The program is a simple file system. You can create or delete files and folders, list files in a folder, change the curren...

Category: Crypto & Forensics Points: 150 I did not look at this challenge at first, until I found that many teams have already solved this one except us, so I decide to give it a try :P It ...

Category: Reverse Points: 250 The challenge gave us a file call rop.iseq. By checking the file header, I found that it was a binary format of Ruby’s InstructionSequence. By googling the Instruc...

Category: PPC ( more like Reverse ) Points: 150 We were given a 32 bit PowerPC ELF. Fortunately I’ve got qemu-ppc-static installed on my ctf-box, so we can actually run the program by the follow...

Category: pwn Points: 100 I did not finish the challenge during the contest, but was able to solve it after the game. Damn if only I can fuzz some more… 64 bit ELF, with Partial RELRO, canary ...

Category: pwn Points: 99 32 bit ELF, with no NX, PIE, RELRO protection. The program will first use mmap to allocate a range of memory and treat it as a shadow stack, which stores the function re...

Category: pwn Points: 177 64 bit ELF, with Partial RELRO, Canary & NX enabled, no PIE. libc.so was provided. The binary is a car market program. It will let us list our cars’ info, add a ca...

Category: pwn Points: 200 64 bit ELF, with FULL RELRO, NX, stack guard & PIE enabled. After doing some reversing, we found that it’s a Befunge-93 program interpreter. It will first read som...

Category: pwn Points: 150 After a long period of time without playing any CTF, I finally finished my master’s degree and have time to enjoy some CTF challenges. And then there is the Tokyo Weste...