MS says flaws in patch may be a new vulnerability

Problems that researchers claim went unfixed in an Internet Explorer (IE) security patch released last Wednesday may expose a potential new vulnerability, a Microsoft official said last Friday.

Scott Culp, manager of Microsoft's Security Response Center, said the issues reported to the NTBugtraq mailing list expose a potential new vulnerability that appears similar "from the outside" to previous vulnerabilities when in fact, it affects a different piece of IE code.

"We are investigating it," Culp said. "If it turns out to be bonafide," the company will work on a patch, he said.

In the meantime, Culp urged users to download the available patch that Microsoft released. The patch is designed to address six new vulnerabilities, as well as any previous vulnerabilities, found in Versions 5.01, 5.5 and 6.0 of its IE browser.

The day after the patch was released, reports surfaced that the patch didn't address all of the vulnerabilities it claimed to fix. GreyMagic Software, an Israeli security firm, reported to the NTBugtraq mailing list that Microsoft only patched symptoms of the vulnerability -- "not its root cause."

Culp said the overall scope of the vulnerability exposed by GreyMagic is very similar in appearance outside to the vulnerabilities addressed in Microsoft's latest security bulletin. "It's a completely different vulnerability in terms of where the flaw lies in IE," Culp said.

GreyMagic officials could not be reached for comment at deadline.

Russ Cooper, moderator of the Windows NT NTBugtraq mailing list and an analyst at TruSecure Corp. in Herndon, Va., said only Microsoft would know if the bug affects a different piece of code, since it has access to the source code. He said users are getting concerned that when patches come out, there will be fixes for the patches.

"Administrators are afraid in a number of days or a week, there will be a new version," he 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.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Carol Sliwa

PC World
Show Comments

Brand Post

Most Popular Reviews

Latest Articles


PCW Evaluation Team

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.

Walid Mikhael

Brother QL-820NWB Professional Label Printer

It’s easy to set up, it’s compact and quiet when printing and to top if off, the print quality is excellent. This is hands down the best printer I’ve used for printing labels.

Ben Ramsden

Sharp PN-40TC1 Huddle Board

Brainstorming, innovation, problem solving, and negotiation have all become much more productive and valuable if people can easily collaborate in real time with minimal friction.

Sarah Ieroianni

Brother QL-820NWB Professional Label Printer

The print quality also does not disappoint, it’s clear, bold, doesn’t smudge and the text is perfectly sized.

Featured Content

Product Launch Showcase

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?