Exploit Computer Viruses

An "exploit" is a short piece of code or script that uses a computer security vulnerability in software or an operating system to perform certain malicious actions. The most famous exploit is called ´Incorrect MIME Header exploit´ or ´Iframe´. The Incorrect MIME Header exploit allows one to automatically run an e-mail attachment on certain unpatched versions of Microsoft e-mail and web browsing software. This exploit is widely used by famous e-mail worms - Nimda, Klez, Yaha, Bugbear, Bridex and many others. When a recipient of an infected e-mail only previews an infected message, an infected attachment is activated by the Iframe exploit and a computer becomes infected.