This is the second part of my walkthrough for Bob, a vulnerable virtual machine from vulnhub. In the first part of this walkthrough I demonstrated how you get into the server, which was not a pretty big deal.
Now, the second part is all about privilege escalation.
In simple terms, in penetration testing, privilege escalation is about moving from a low-privileged user to administrator or root. If we're talking about a Windows system, you escalate to administrator, if we're dealing with a Unix system, you escalate to root.
In this scenario, there are multiple users, each with different privileges on the system. However, I try to adopt the least complicated and shortest way to get to root. Enjoy the demonstration.
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Cristi Vlad Self-Experimenter and Author