Whether you're a fan of Adobe Flash or not, it has been a building block for interactive content on the web, and we must acknowledge what it has accomplished before talking about its eventual removal from the internet. These plug-ins helped usher in a new age of web browsing and, at the same time, were targets for vulnerabilities and exploits within browsers.
As HTML5 becomes more popular, even now becoming close to a standard, use of the once-popular Flash is diminishing. Using HTML5 enables a more secure and efficient browsing experience that works across both mobile and desktop platforms.
Adobe is aware that, even though Flash is steadily declining, there are still many sites that rely on their technology to function; therefore, Adobe has given a timeframe of 2020 before Flash's end of life. The company knew it needed to give clients who are currently using its software the proper lead time to migrate toward other software to run their applications before pulling the plug.
Adobe itself has encouraged those using Flash to migrate any existing Flash content to new open formats. During this time, Adobe has mentioned that it will stop updating and distributing Flash, but will continue to support it through regular security patches, features and capabilities. Hearing this, I get the feeling that they'll be keeping Flash on life support for a while, before they completely pull the plug on the project altogether.
In order to not be caught off guard when Flash's end of life is official, security teams should be aware of which applications in their organization are currently using Flash, and then create migration paths to have them updated to HTML5 or other open standards. Even if there might be small portions of support after 2020, you never want to be running end-of-life code, especially code that has historically had security vulnerabilities.
Also, security teams should take notice of which desktops are currently using the Flash plug-in and attempt to have it removed around this time. Since Flash acceptance has declined, and will continue to take a nose-dive after this news, there should be less need for the Flash plug-in moving forward.
You should prepare for Flash's end of life by taking stock of your systems; remove the plug-in for systems that may connect to sites that haven't migrated away from Flash yet. By following the school of thought of least privilege and having only software that's needed installed, the attack surface becomes limited.
Eventually, Flash won't be supported, and if bugs are found within the software, then attackers could utilize them for phishing attacks by supporting sites that are designed to use Flash and haven't migrated away. If you don't need it, don't install it.
Read the rest of my article here: http://searchsecurity.techtarget.com/answer/Flashs-end-of-life-How-should-security-teams-prepare
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