The Complete Metasploit Guide

Escalating privileges with local root exploits

The overlayfs privilege escalation vulnerability allow local users to gain root privileges by leveraging a configuration in which overlayfs is permitted in an arbitrary mounted namespace. The weakness lies because the implementation of overlayfs does not correctly check the permissions for file creation in the upper filesystem directory.

More on the vulnerability can be found here: https://www.cvedetails.com/cve/cve-2015-1328.

Let's drop into a shell and download the raw exploit onto the target from https://www.exploit-db.com/:

Let's rename the exploit from 37292 to 37292.c and compile it with ...