Microsoft Releases Emergency Internet Explorer Patch

The patch addresses 10 vulnerabilities in the Web browser; Internet Explorer 6 and 7 users are most at risk.

By Thomas Claburn InformationWeek March 30, 2010 01:51 PM

Microsoft on Tuesday released an emergency, or out-of-band, patch for 10 vulnerabilities in Internet Explorer.

“The Internet Explorer team accelerated testing of this update due to the growing attacks against the publicly disclosed vulnerability (CVE-2010-0806), and the update has reached the appropriate quality bar for distribution to customers,” said Microsoft Security Response group manager Jerry Bryant in a blog post. “Releasing the update early provides Internet Explorer 6 and 7 customers protection against the active attacks and provides users of all versions of Internet Explorer protection against nine other vulnerabilities.”

Symantec security researcher Joshua Talbot said in an e-mail that the catalyst for the patch is the increased activity related to the iepeers.dll zero-day vulnerability that surfaced March 9. “Symantec has also observed a recent spike in attempted infections via this security hole,” he said. “The typical attempted infection process seems to involve compromising a legitimate Web site then inserting an iframe which redirects users to a malicious site.”

Internet Explorer 6 and 7 users are at risk from the iepeers.dll vulnerability; Internet Explorer 8 users are not.

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