exploit-exercises.com provides a variety of virtual machines, documentation
and challenges that can be used to learn about a variety of computer
security issues such as privilege escalation, vulnerability analysis, exploit
development, debugging, reverse engineering, and general cyber security issues.
Nebula covers a variety of simple and intermediate challenges that cover
Linux privilege escalation, common scripting language issues, and file
system race conditions.
Nebula is an ideal place to get started for people new to Linux exploitation.
Protostar introduces basic memory corruption issues such as buffer overflows,
format strings and heap exploitation under “old-style” Linux system that does
not have any form of modern exploit mitigiation systems enabled.
Protostar is the next progression from Nebula.
Fusion continues the memory corruption, format strings and heap exploitation
but this time focusing on more advanced scenarios and modern protection systems.
Fusion is the place to start if you are familiar with Linux exploitation and
wish to learn more about exploitation prevention systems.