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Cache cramming is the process of making a computer execute a malicious file that would otherwise be restricted. It executes a small program in the browser cache that enables hackers/crackers to locally sniff open ports and/or access target computers.
Cache cramming works when an applet or Java code is downloaded into a user’s computer upon visiting an infected website. This Java code, disguising itself as an applet and usually a port scanner, executes in the background and starts scanning and listening for open ports. The information of such vulnerable ports is sent back to the hacker/cracker, who than uses the information to gain access to the victim’s computer.
Typically, cache cramming mostly affects computers using the Internet Explorer (IE) browser.