Unpatched IE hole a gold mine for hackers

A long ignored security hole in Microsoft's Internet Explorer is proving to be a gold mine for hackers, providing an easy way for them to plant malicious programs on vulnerable machines through hacker Web sites and instant messaging applications, security experts warn.

New attacks using the vulnerability include a worm that spreads through America Online's Instant Messenger (AIM) and a malicious Web site that silently loads snooping software on victims' machines, according to independent security expert Richard Smith.

Microsoft did not immediately respond to requests for comment.

The security hole, known as the "Object Data vulnerability," is in software code used by IE to process HTML (Hypertext Markup Language) pages containing an element called the Object Data tag. When properly exploited, the vulnerability enables an attacker to place a malicious computer program on a user's machine. No user actions are required to infect a machine, aside from opening an e-mail message or visiting a Web page rigged by an attacker.

Microsoft issued a software patch, MS03-032, on August 20 that was supposed to fix the problem. However, that patch failed to close the hole on Windows machines running Internet Explorer (IE) versions 5.01, 5.5 and 6.0.

On September 8, Microsoft acknowledged problems with the MS03-032 patch and promised to issue a fix as soon as possible. Since that time, no changes have been made to the MS03-032 patch. In the succeeding weeks, hackers moved quickly to take advantage of Redmond's slow response.

Recent exploits of the Object Data vulnerability include a virus that spreads over the AIM network, stealing users' account names and passwords then mailing links to a malicious hacker Web site to the victim's AIM correspondents (or "buddies"), Smith said.

Although the Web site associated with that threat has been removed, users who received and clicked on an infected instant message could have had their AIM account hijacked, according to Smith.

The vulnerability also cropped up in an e-mail message containing HTML code that exploits the vulnerability. When opened, the message installs a file called "surferbar.dll" onto the victim's computer with links to pornographic Web sites, according to security company Secunia of Copenhagen, Denmark.

While some of the new attacks are targeting holes in the MS3-032 patch, others may just be targeting users who have not applied the patch at all, Smith said. Short of issuing an updated patch that closed the hole, Microsoft should at least update its bulletin with a widely known workaround that closes the security hole, Smith said.

That fix, developed by a researcher at eEye Digital Security requires a small change to the Windows configuration that does not appear to affect any Windows features, but would protect users from attack, he said.

In the meantime, hackers will continue to take advantage of the Object Data vulnerability, which is easy to exploit and powerful, he said. "The sky's the limit of what you can do with (the Object Data vulnerability). This exploit is going to be used for years," Smith said.

Join the newsletter!


Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Paul Roberts

IDG News Service
Show Comments

Brand Post

Most Popular Reviews

Latest Articles


PCW Evaluation Team

Luke Hill


I need power and lots of it. As a Front End Web developer anything less just won’t cut it which is why the MSI GT75 is an outstanding laptop for me. It’s a sleek and futuristic looking, high quality, beast that has a touch of sci-fi flare about it.

Emily Tyson

MSI GE63 Raider

If you’re looking to invest in your next work horse laptop for work or home use, you can’t go wrong with the MSI GE63.

Laura Johnston

MSI GS65 Stealth Thin

If you can afford the price tag, it is well worth the money. It out performs any other laptop I have tried for gaming, and the transportable design and incredible display also make it ideal for work.

Andrew Teoh

Brother MFC-L9570CDW Multifunction Printer

Touch screen visibility and operation was great and easy to navigate. Each menu and sub-menu was in an understandable order and category

Louise Coady

Brother MFC-L9570CDW Multifunction Printer

The printer was convenient, produced clear and vibrant images and was very easy to use

Edwina Hargreaves

WD My Cloud Home

I would recommend this device for families and small businesses who want one safe place to store all their important digital content and a way to easily share it with friends, family, business partners, or customers.

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?