back2skool-3fbcd46db37c50ad52675294f566790c777b9d1f: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.24, stripped This is the binary for MathServ, “The one-stop shop for all your arithmetic needs”. $ nc localhost 31337 __ ___ __ __ _____ / |/ […]
shiftd-3a9c2a55e77d1467ee46dfb931170c737d24f310: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.24, stripped Shiftd is an interesting X86_64 challenge combining information leak and exploitation. There is an hard-coded password for access to the service, then the binary asks you for your name and how you […]
funnybusiness-fb84813ddd932f6aceee0ed3a4e9f1e0a7082dc1: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.24, stripped After reversing this ELF32 binary, when we reconstruct the following connection handler: int __cdecl handler(int sock_fd) { int z_code; char zlib_input_buffer; strm.zalloc = 0; strm.zfree = 0; […]