13 Sep

Command injection

Command injection is an attack in which the goal is execution of arbitrary commands on the host operating system via a vulnerable application.

Command injection attacks are possible when an application passes unsafe user supplied data (forms, cookies, HTTP headers etc.) to a system shell.

04 Jul

Websphere issue: "Application already exists in the configuration repository"

Sometime developers may see this error when they try to install application into WebSphere server. The reason is old files in the temperary folders. What developer should do?

18 Feb

Architecture overview of Facebook (2010)

Each of us knows/uses Facebook. This social network solution is very popular in the world. But for IT specialists the Facebook solution is very interesting from other prospect: Facebook's gays each day solve the problems and create technology which really works for millions users! How the can do it?