Researchers disclose four unpatched vulnerabilities in Internet Explorer

The reports contain limited information, making exploit development hard and unlikely

Security researchers published limited details about four unpatched vulnerabilities in Internet Explorer because Microsoft has not moved quickly enough to fix them.

The flaws could potentially be exploited to execute malicious code on computers when users visit compromised websites or open specially crafted documents. They were reported through Hewlett-Packard's Zero Day Initiative (ZDI) program.

HP's TippingPoint division, which sells network security products, pays researchers for information on unpatched high-risk vulnerabilities in popular software. The company uses the information to create detection signatures, giving it a competitive advantage, but also reports the flaws to the affected vendors so they can be fixed.

The ZDI team gives vendors 120 days to develop fixes before making limited information about the flaws reported to them public. That deadline was apparently reached for the four Internet Explorer vulnerabilities this week.

The ZDI advisories describe the type, impact and general location of the flaws, but intentionally leave out technical details that could help attackers create exploits for them. In other words, they don't classify as full disclosure.

Three of the new ZDI advisories don't have sufficient information for other researchers or hackers to easily rediscover the issues, said Carsten Eiram, the chief research officer at vulnerability intelligence firm Risk Based Security, via email. The fourth one, however, is a bit more detailed, he said.

That advisory, tracked as ZDI-15-359, covers a vulnerability that was used by security researcher Nicolas Joly during the Mobile Pwn2Own hacking contest organized by ZDI in November last year. As part of the contest rules, researchers disclose the vulnerabilities they use with ZDI which then shares them with the affected vendors.

Because it was used at Mobile Pwn2Own, it means that reliable exploitation for this flaw has already been proven and is not just theoretical. According to Eiram, this could make it worthwhile for others to try to figure it out before Microsoft releases a patch. The advisory also mentions the exact affected function -- CTableLayout::AddRow().

"I'd say this one may have sufficient information for someone to at least get a good starting point," Eiram said. "There are so many angles in browser exploitation, so it could still take a while to figure out the exact problem in the function depending on its size, how to trigger it, and then how to exploit it, but it's plausible that someone would spend some time trying to figure that one out in order to exploit it."

Join the newsletter!

Or

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.

Tags MicrosoftHewlett-PackardintrusionExploits / vulnerabilitiesRisk Based Security

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Lucian Constantin

IDG News Service
Show Comments

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Luke Hill

MSI GT75 TITAN

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?