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Series
Nebula takes the participant through a variety of common vulnerabilities in Linux. At the end of Nebula, the user will have a thorough understanding of local attacks against Linux systems.
Objective strace the binary at /home/flag15/flag15 and see if you spot anything out of the ordinary. You may wish to review how to “compile a shared library in linux” and how the libraries are loaded and processed by reviewing the dlopen manpage in ...
Objective This program resides in /home/flag14/flag14. It encrypts input and writes it to standard output. An encrypted token file is also in that home directory, decrypt it :) To do this level, log in as the level14 account with the password level1...
The /home/flag11/flag11 binary processes standard input and executes a shell command.There are two ways of completing this level, you may wish to do both :-) Source code #include <stdlib.h> #include <unistd.h> #include <string.h> #include <sys/types...
There is a backdoor process listening on port 50001. To do this level, log in as the level12 account with the password level12. Files for this level can be found in /home/flag12. Source code local socket = require("socket") local server = assert(soc...
The setuid binary at /home/flag10/flag10 binary will upload any file given, as long as it meets the requirements of the access() system call. Source code #include <stdlib.h> #include <unistd.h> #include <sys/types.h> #include <stdio.h> #include <fcn...
World readable files strike again. Check what that user was up to, and use it to log into flag08 account. To do this level, log in as the level08 account with the password level08. Files for this level can be found in /home/flag08. Source code There...
