![]() ![]() For most Linux Operating Systems the file shouldn’t be accessible from non-root users. ![]() The file located under /proc/self/environ contains several environment variables such as REMOTE_PORT, HTTP_USER_AGENT and more. The technique we are going to examine first is the most common method used to gain a shell from an LFI. Screenshot from the LFI vulnerable app implementation by DVWA. This implementation can be found at the DVWA project. Let’s break this down.įor simplicity’s sake, we will be using the following PHP code as the vulnerable web application: We will encounter several difficulties, and this is why we will examine multiple techniques. Most of the times, what we should focus on, is:Įvery time, we will be trying to inject PHP code inside some server logs to use the LFI attack and thus, execute the code. Several ways have been developed to achieve this goal. With LFI we can sometimes execute shell commands directly to the server. As you probably already know, LFI attacks don’t only allow attackers to view contents of several files inside a server. ![]()
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