Microsoft Corp. would better protect users by severing Internet Explorer's connections to Windows, then patching the browser invisibly in the background -- daily if necessary, a security expert argued today.

"The browser is the heaviest used application that interacts with the Internet, and the most likely source of malicious content. IE vulnerabilities should be given the highest priority and patched first," said Wolfgang Kandek, chief technology officer at security company Qualys Inc.

But that's not what happens in the real world, he said. "Unfortunately, the vulnerability data that we collect shows that companies treat browser patches just like all other patches. IE's patch deployment cycle correlates very closely with other critical patches."

According to data that Qualys collected from scans of several hundred thousand Windows PCs owned by its customers, the patching pace for IE vulnerabilities was essentially the same as the rate at which users fixed other non-IE critical flaws.

To pick up that pace, Kandek suggested that Microsoft sever Windows' links to IE completely, then boost IE's update frequency and take some, or all, of the control out of users' hands. "There's just too much user interaction required by Microsoft for IE," he said, referring to the way Microsoft updates its software, IE included, using services such as Windows Update.

"If Microsoft removed IE from Windows and made it independently updatable, I think you'd get improved update performance," said Kandek.

Although pulling IE from Windows would mean that Microsoft would have to come up with a different mechanism for Windows Update -- currently the service relies on IE -- Kandek believes the benefit to users would be significant. "Taking IE out of the [monthly] patch cycle would give us better protection," he said.

Rather than patching IE only once a month, as it does now, Kandek would like to see Microsoft pick up the pace by rolling out fixes as soon as they're ready, in effect mimicking the update process that Mozilla Corp. uses for Firefox, or the even less intrusive approach that Google Inc. applies to its Chrome browser.

Firefox users receive a notice when security updates are available, and can click through to download and install the patches. Chrome users, meanwhile, do nothing: Google pushes patches to its browser automatically, and they're installed with no user action required. Either method would be preferable to Microsoft's current update strategy for IE, Kandek said.

That applies for all IE users, including those working for companies where IE is mandatory, and patch deployment can be delayed by testing, or for fear of disrupting workflow. "I think that you should just determine for the corporation to trust Microsoft and their quality control" on the patches, Kandek said. "Browser patches are heavily tested by Microsoft, and unlikely to break any existing functionality on the desktop."

Microsoft could conceivably split IE from Windows with its newest browser, Internet Explorer 8, which reached "release candidate" status late last month. "IE8 would be a good opportunity," said Kandek.

Ironically, he may get his wish if the European Union has its way. The Competition Commission, the EU's antitrust agency, recently hit Microsoft with a new set of charges, this time concerning IE. On Jan. 15, the commission said that by tying IE to Windows, Microsoft "distorts competition" in browsers and gives IE "an artificial distribution advantage" over rivals like Firefox, Apple Inc.'s Safari and Opera Software ASA's Opera.

"If the [commission's] preliminary views were confirmed, the commission would consider ordering Microsoft to give users an objective opportunity to choose which competing Web browser(s) instead of, or in addition to, Internet Explorer they wanted to install in Windows, and which one they wanted to have as default," said EU spokesman Jonathan Todd in an e-mail. "Microsoft could also be ordered to technically allow the user to disable Internet Explorer code should the user choose to install a competing browser."

Although IE's market share has been steadily shrinking -- under assault from Firefox, first of all, Safari second -- it accounted for about 68 percent of all browsers used last month, according to Internet metrics vendor Net Applications Inc.

This story, "Security Expert: Microsoft Should Sever IE From Windows" was originally published by CSO .