Security Flaw Leaves All Microsoft Internet Explorer Users Vulnerable

CYBERSPACE — A new security hole affects all versions of Microsoft's Internet Explorer, leaving users of the leading web browser vulnerable to attack on a wide array of compromised websites.

Two online security firms have reported that hackers have broken in an unspecified number of websites and added malicious code that exploits the vulnerability in MS IE. Once installed, the virus starts stealing sensitive user data.

Online security firms Security Fix and SANS Internet Storm Center both reported on the vulnerability, which is linked to a specific file associated with MS IE. Microsoft also released an advisory, saying that the vulnerability is present in all versions of MS IE from version 5 onward.

But Washington Post tech security writer Brian Krebs noticed that some of the safety precautions recommended by Microsoft don't work quite right.

"Microsoft recommends enabling a feature called 'data execution prevention,' by clicking 'Tools,' 'Internet Options,' then 'Advanced,' and then checking the box next to that option," he said. "However, when I tried to make the changes in IE7 on Vista, I found that option grayed out. To make that change, I had to close out of IE completely, then right click on the IE icon, select 'Run as Administrator,' and then alter the setting."

Krebs also noted that Microsoft advised MS IE users to change their security setting to "high," even though such a setting renders most common websites unreadable. In addition, MS IE users can disable a specific function to prevent the attacks. The function is called "oledb32.dll." Unfortunately, Krebs also ran into trouble when trying to remove it, leading him to make a dramatic recommendation.

"I would advise Windows users to consider browsing the web with anything other than Internet Explorer, at least until Microsoft issues a patch to fix this vulnerability," he said. "It is not my intention to over-hype the situation, but as we have seen time and again, attackers are usually very quick to take advantage of flaws in IE because the program is the default browser for close to 80 percent of the planet."

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