A backdoor is a method to bypass normal authentication or encryption in a computer system. An application that allows remote access to computers commonly known as a backdoor. Backdoor is used for applications that allow for remote access to computers. The attacker can exploit backdoor programs to access the client’s network. These backdoor can help cyber-criminals break into the infrastructure without being discovered. If a server has been breached once, there is a chance that the criminal might have installed a backdoor so that they can easily return to the server if required. Backdoors may be secretly added to information technology by organisations or individuals to gain access to their systems and data. It can also be an open and documented feature of information technology. In either case, they can potentially represent an information security vulnerability. The best way an attacker can implement backdoor is through remote file inclusion. The attacker will attempt phishing attacks to make the remote host download a trojan that gives the attacker the access to create a backdoor.
Using this vulnerability, an attacker can:-
Beagle recommends the following fixes:-