Adobes Move to Kill Flash Is Good for Security

In recent years, Flash became one of the buggiest widely used apps out there.

Adobe this week announced plans to finally kill off its Flash media player by the end of 2020, citing obsolescence as one of the primary drivers for its decision. But the reason many want to see the end of the product is security.
For over two decades, Adobe Flash has powered video and interactive content on the Web, especially in areas such as gaming, education, and advertising. But in the past few years, it also became one of
the
buggiest apps out there.
Statistics maintained by
Mitre
show that in 2016 alone a total of 266 vulnerabilities were disclosed in Flash Player, a vast majority of them critical, remotely executable flaws and denial-of-service flaws.
Despite widespread concern over security issues, the number of vulnerabilities in Flash Player actually increased in recent years instead of trending down. In fact, more than half of all vulnerabilities in Flash since 2005 — or 652 vulnerabilities out of 1,030 — were disclosed in just the last three years.
Many of the flaws in Flash have enabled widespread attacks against users running Windows, Chrome, and other platforms. In 2015, Flash
accounted
for some 17% of all zero-day vulnerabilities discovered that year. Four of the five most exploited zero days in 2015 were in Flash.
Eight of the top 10 security flaws leveraged by exploit kit makers in 2015 were in Flash, according to
Recorded Future
.
Flash had the most vulnerabilities of any application — not operating systems — in 2016, and that is after years of Adobe fixing Flash, says John Pescatore, director of emerging security threats at the SANS Institute. So the companys decision to pull the plug on the product is a good one, he says.
To me, Flash was pretty much just built on a rotted foundation. No amount of added plywood or new shingles was ever going to make it structurally sound or anywhere near safe.
As far back as 2010, Apples Steve Jobs
cited
Flashs relative lack of security as one of multiple reasons why Apple would not pre-install the technology on iPhones, iPads, and iPods.
In recent years, all major browser makers — including Google, Apple, Microsoft, and Mozilla — have announced plans to gradually phase out support for the technology. Browsers such as Safari and Microsoft Edge already require users explicit permission to run the Flash plugin on websites instead of allowing it to run by default. Google has said it will do the same with Chrome soon.
Adobe itself portrayed its decision to end-of-life Flash as being driven by technology trends. In an
alert
Tuesday, Adobe said technologies such as HTML5, WebGL, and WebAssembly have matured to a point where they have become viable alternatives to Flash for multimedia content on the Web.
Most browser makers have begun integrating capabilities directly into their browsers that were once available only via plugins like Flash. Given this progression, Adobe has decided to terminate support for Flash at the end of 2020, the company said.
Microsoft
,
Google
, and
Apple
issued simultaneous alerts endorsing the move while reminding users of previously announced plans for phasing out support for Flash in each of their products soon.
Facebook
, a platform for which many developers have built Flash-powered games, noted how the evolution of WebGL and HTML5 standards had almost made Flash obsolete, and it urged developers to follow the deadlines set by browser makers. Games built on Flash will continue to run through the end of 2020, but developers should make plans for migrating to other technologies soon, the company noted.
Adobe Flash has been heavily leveraged in advertising, media, and e-learning spaces, says Mark Butler, CISO of Qualys. But unfortunately, Adobe has not kept pace with the necessary security updates in order to outweigh the benefits of using the product.
Organizations that rely on Flash should consider moving to HTML5 quickly as it meets the functional needs that Flash previously met. Unlike Flash, HTML5 doesnt require any plugins and allows for seamless inclusion of audio and video files into code, he says. HTML5 is also an open technology that all new browsers have begun to incorporate.
Security best practice dictates removal or maintaining current patch levels of Adobes Flash and Java software versions, he said.
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Adobes Move to Kill Flash Is Good for Security