Adobe sets IE as next target in Flash security work
Releases beta of sandboxed Flash Player plug-in for Firefox, on to Microsoft's browser
Computerworld - Adobe plans to tackle Microsoft's Internet Explorer (IE) in its ongoing work to "sandbox" its popular Flash Player within browsers, Adobe's head of security said today.
Yesterday, Adobe released a beta version of a sandboxed Flash Player plug-in for Mozilla's Firefox on Windows Vista and Windows 7 as a follow-up to a similar initiative in 2010 for Google's Chrome.
Next on the list: IE.
"IE has a big chunk of the user base," said Brad Arkin, senior director of security, products and services, in an interview Tuesday. "We want to do what protects the most users the fastest, so we're looking at how we can tackle sandboxing in IE."
Arkin's right about IE's market share: According to Web metrics company Net Applications, IE accounted for 53% of all browsers used last month worldwide, or more than double Firefox's 21% and almost triple Chrome's 19%.
But Akin declined to set a timetable for putting Flash within a sandbox inside IE.
"The way that Flash integrates with IE is at a very low level," he said, noting that the two programs frequently share the same memory space. IE also uses an entirely different plug-in infrastructure -- Microsoft's own ActiveX technology -- than other browsers.
"This will be a really steep hill to climb," said Arkin of the task of sandboxing the Flash plug-in for IE. "It will be a very different task compared to what we've done on Chrome and Firefox.... The difference is huge. We're still sorting through what is required on IE."
A sandbox isolates processes on the computer, preventing or at least hindering malware from letting hackers exploit an unpatched vulnerability, escalate privileges and push their attack code onto the machine.
Adobe first sandboxed Flash Player for Chrome in late 2010 after working with Google engineers; the Monday release of a sandboxed plug-in for Firefox came after similar cooperation from Mozilla engineers.
Arkin said Mozilla's developers "did a lot of work" to help Adobe during the development of the sandboxed Flash plug-in, including modifying Firefox. Arkin described the work with Mozilla as an "informal cooperation."
A similar process is taking place now with Microsoft. "There have been very active conversations between Adobe and Microsoft on this," said Arkin.
At a high level, constructing a sandboxed Flash plug-in for Firefox was similar to what Adobe had already done for Chrome, and the technology it debuted in Adobe Reader in November 2010.
Specifically, Adobe built a "broker," a low-privilege process that decides which functions Flash can conduct outside the sandbox, and mediates those requests between the plug-in on one hand, and Firefox and the operating system on the other.
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