Computer viruses can be classified into several different types. The first and most common type is the virus which infects any application program. On IBM PC’s and clones running under PC-DOS or MS-DOS, most programs and data which do not belong to the operating system itself are stored as files. Each file has a file … Read more
A plethora of negative magazine articles and books have catalyzed a new kind of hypochondria among computer users: an unreasonable fear of computer viruses. This hypochondria is possible because a) computers are very complex machines which will often behave in ways which are not obvious to the average user, and b) computer viruses are still … Read more
Beyond the basic searching techniques explored in the previous articles, Google offers special terms known as advanced operators to help you perform more advanced queries.These operators, used properly, can help you get to exactly the information you’re looking for without spending too much time poring over page after page of search results. When advanced operators … Read more
Advanced Google users begin testing advanced queries right from the Web interface’s search field, refining queries until they are just right. Every Google query can be represented with a URL that points to the results page. Google’s results pages are not static pages.They are dynamic and are created “on the fly” when you click the … Read more
Google searching is a process, the goal of which is to find information about a topic.The process begins with a basic search, which is modified in a variety of ways until only the pages of relevant information are returned. Google’s ranking technology helps this process along by placing the highest-ranking pages on the first results … Read more
Google query building is a process.There’s really no such thing as an incorrect search. It’s entirely possible to create an ineffective search, but with the explosive growth of the Internet and the size of Google’s cache, a query that’s inefficient today may just provide good results tomorrow—or next month or next year.The idea behind effective … Read more
To some extent, an organization deploying a third-party web server product is inevitably placing its fate in the hands of the software vendor. Nevertheless, there is still a large amount that a security-conscious organization can do to protect itself against the kind of software vulnerabilities. Choose Software with a Good Track Record Not all software … Read more
If you are lucky, the web server you are targeting may contain some of the actual vulnerabilities described in this chapter. More likely, however, it will have been patched to a more recent level, and you will need to search for something fairly current or brand new with which to attack the server. A good … Read more
Encoding flaws have arisen in many kinds of web server software and present an inherent threat in situations where the same user-supplied data is processed by several layers using different technologies. A typical web request might be handled by the web server, the application platform, various man-aged and unmanaged APIs, other software components, and the … Read more
Accipiter DirectServer This path traversal flaw could be exploited by placing URL-encoded dot-dot-slash sequences into a request. For more information about this flaw, see www.securityfocus.com/bid/9389 . Alibaba This path traversal flaw could be exploited by placing simple dot-dot-slash sequences into a request. For more information about this flaw, see www.securityfocus.com/bid/270 . Cisco ACS Acme.server This … Read more