New Internet Explorer zero-day details released after Microsoft fails to patch

The seven-month-old flaw has remained unpatched in Internet Explorer 8, which has a 20 percent market share

By , IDG News Service |  Security

An older version of Microsoft's Internet Explorer browser has an unpatched software flaw that could allow rogue code to run on a computer, the second such flaw found in a month.

Microsoft was told of the flaw in October, which was discovered by Belgian researcher Peter Van Eeckhoutte, according to an advisory published Wednesday by HP's Zero Day Initiative (ZDI), a program that rewards security researchers for finding software flaws.

ZDI holds off publicly publishing information on a security flaw for up to six months so a software vendor can patch it. As that period came close to expiring, ZDI said it told Microsoft on May 8 that it intended to publish details of the flaw.

Microsoft's IE 8 browser, released five years ago, still holds a 20 percent share of the desktop browser market, according to statistics for April compiled by Net Applications. Microsoft officials couldn't be immediately reached for comment.

To exploit the vulnerability, an attacker would have to lure a potential victim to a website engineered to take advantage of the flaw, ZDI's advisory said. That could be accomplished by sending the victim an email or instant message that, if clicked, would lead to the attack. If the attack is successful, the hacker would have the same user rights on the computer as the victim.

ZDI wrote that the vulnerability is a "use-after-free" flaw, which involves the handling of CMarkup objects.

Earlier this month, Microsoft issued an emergency patch for a flaw that affected IE 6 through 11. The problem could allow attackers to execute code remotely on a compromised computer if the user views an infected Web page using the browser.

Send news tips and comments to jeremy_kirk@idg.com. Follow me on Twitter: @jeremy_kirk

Join us:
Facebook

Twitter

Pinterest

Tumblr

LinkedIn

Google+

Spotlight on ...
Online Training

    Upgrade your skills and earn higher pay

    Readers to share their best tips for maximizing training dollars and getting the most out self-directed learning. Here’s what they said.

     

    Learn more

Answers - Powered by ITworld

ITworld Answers helps you solve problems and share expertise. Ask a question or take a crack at answering the new questions below.

Ask a Question
randomness