Proving Grounds - Sar WriteupThis lab demonstrates how to exploit a remote code execution (RCE) vulnerability in a vulnerable version of sar2html. By discovering the application via the robots.txt file and leveraging the RCE, you gain an initial shell. Privilege escalation is achieved by exploiting a cronjob misconfiguration that allows overwriting a custom .sh script executed as root.
Proving Grounds - OnSystemShellDredd WriteupThis lab challenges you to exploit an exposed FTP service to uncover a hidden SSH private key, granting initial access to the system. From there, privilege escalation is achieved by leveraging a misconfigured SUID binary, cpulimit, to execute arbitrary commands as root.
Proving Grounds - FunboxEasy WriteupThis lab involves exploiting an SQL Injection vulnerability to leak credentials for a web application, leading to a file upload vulnerability that provides initial access. Privilege escalation is achieved via user password disclosure and multiple sudo misconfigurations, ultimately granting root access through tools like pkexec or time.