Something about sudo, Kingcope and re-inventing the wheel

This write-up documents a proof-of-concept local privilege escalation that abuses LD_PRELOAD with sudo when the environment is preserved (e.g., Defaults setenv or older sudo versions). The author reproduces and refines a 2008 Kingcope exploit, providing C source for a shared object, build and invocation steps to execute a root shell by running a sudo-allowed command, and notes the limitation that this requires a specific sudo configuration or outdated sudo.