If you do have a web server, and browse your logs regularly, you will probably find regular probes for various web applications, even some that you don't even use. In many cases, these probes are looking for very common web applications with well known vulnerabilities. Most of the time, the vulnerabilities are old, and a patched version of the application is available. But web applications can be hard to patch and are usually not included in normal patch routines. These web applications are also often customized and the customization makes patching harder. To make things even more complex: It is not always the application itself, but a plugin that is causing the problem.

What I am trying to do here is to assemble a list of the most dangerous web applications. We will use a survey, the 404 project and any other data people may have to rank them. Once these applications are identified, we will try to collect hardening guides to help you run these applications securely.

Please see the survey here http://isc.sans.edu/survey/4 and consider participating to get this project started. The survey will just be one source of data we will be using.

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Johannes B. Ullrich, Ph.D.
SANS Technology Institute
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