Identifying Services Through Banner Grabbing
Explore how to use banner grabbing to identify network services and versions crucial for vulnerability scanning. Learn to perform banner grabbing on protocols like TFTP and HTTP using Python sockets and requests, as well as command-line techniques, to gather server information effectively.
Introduction to banner grabbing
A vulnerability scanner can identify vulnerable applications by looking them up in a tool such as the National Vulnerability Database (NVD). The NVD is a free, publicly available repository of information on all publicly-reported vulnerabilities.
However, looking up an application in the NVD requires knowledge of the application’s name and version number. The ability to determine this is the secret sauce that makes vulnerability scanners valuable.
In some cases, identifying an application is as simple as starting ...