History
Heap sprays have been used occasionally in exploits since at least 2001, but the technique started to see widespread use in exploits for web browsers in the summer of 2005 after the release of several such exploits which used the technique against a wide range of bugs in Internet Explorer. The heap sprays used in all these exploits were very similar, which showed the versatility of the technique and its ease of use, without need for major modifications between exploits. It proved simple enough to understand and use to allow novice hackers to quickly write reliable exploits for many types of vulnerabilities in web browsers and web browser plug-ins. Many web browser exploits that use heap spraying consist only of a heap spray that is copy-pasted from a previous exploit combined with a small piece of script or HTML that triggers the vulnerability.
Read more about this topic: Heap Spraying
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