Guninski finds another hole in MS Exchange security

The advisory said Microsoft's OLE DB for Internet publishing program, a tool used to help Web-publish information stored in databases, gives a scripting interface for accessing and manipulating objects on IIS 5.0 or in Web storage. "The problem is it allows connecting to arbitrary servers, not only to the server from which the HTML (Hypertext Markup Language) page is loaded," Guninski said in the advisory.

Additionally, if the IIS 5.0 is in the local intranet zone of IE versions 5.0 and higher, the browser, by default, automatically authenticates it, without prompting the user, Guninski wrote.

Guninski classifies the hole as high risk. A Microsoft representative was not immediately available to confirm the report. Guninski said in the report that he had alerted Microsoft to the problem, and that the company replied that, "visiting malicious Web sites is not a real exploit scenario".

A hacker hoping to exploit the hole would have to create a malicious Web page in order to peek at server directories, Guninski wrote. It is possible to list the directories of arbitrary IIS 5.0 servers to which the browsing user has access. "Under certain circumstances it is also possible to read the user's e-mail or folders if it is stored on an Exchange 2000 server with Web storage," he wrote. "It is also possible to create (or probably modify) files on the Exchange 2000 server with Web storage."

He recommended users disable Active Scripting to solve this particular issue.

Guninski discovered several vulnerabilities in Microsoft software last year. His most recent discovery was of a security vulnerability in Microsoft's Windows Media Player 7 reported in January, a problem with the player's "skins" -- custom decorations for the Graphical User Interface -- potentially allowing a hacker to get full control over a user's computer.

Join the PC World newsletter!

Error: Please check your email address.

Our Back to Business guide highlights the best products for you to boost your productivity at home, on the road, at the office, or in the classroom.

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

Essentials

Microsoft L5V-00027 Sculpt Ergonomic Keyboard Desktop

Learn more >

Lexar® JumpDrive® S57 USB 3.0 flash drive

Learn more >

Mobile

Lexar® JumpDrive® S45 USB 3.0 flash drive 

Learn more >

Exec

HD Pan/Tilt Wi-Fi Camera with Night Vision NC450

Learn more >

Lexar® Professional 1800x microSDHC™/microSDXC™ UHS-II cards 

Learn more >

Lexar® JumpDrive® C20c USB Type-C flash drive 

Learn more >

Audio-Technica ATH-ANC70 Noise Cancelling Headphones

Learn more >

Budget

Back To Business Guide

Click for more ›

Most Popular Reviews

Latest News Articles

Resources

PCW Evaluation Team

Azadeh Williams

HP OfficeJet Pro 8730

A smarter way to print for busy small business owners, combining speedy printing with scanning and copying, making it easier to produce high quality documents and images at a touch of a button.

Andrew Grant

HP OfficeJet Pro 8730

I've had a multifunction printer in the office going on 10 years now. It was a neat bit of kit back in the day -- print, copy, scan, fax -- when printing over WiFi felt a bit like magic. It’s seen better days though and an upgrade’s well overdue. This HP OfficeJet Pro 8730 looks like it ticks all the same boxes: print, copy, scan, and fax. (Really? Does anyone fax anything any more? I guess it's good to know the facility’s there, just in case.) Printing over WiFi is more-or- less standard these days.

Ed Dawson

HP OfficeJet Pro 8730

As a freelance writer who is always on the go, I like my technology to be both efficient and effective so I can do my job well. The HP OfficeJet Pro 8730 Inkjet Printer ticks all the boxes in terms of form factor, performance and user interface.

Michael Hargreaves

Windows 10 for Business / Dell XPS 13

I’d happily recommend this touchscreen laptop and Windows 10 as a great way to get serious work done at a desk or on the road.

Aysha Strobbe

Windows 10 / HP Spectre x360

Ultimately, I think the Windows 10 environment is excellent for me as it caters for so many different uses. The inclusion of the Xbox app is also great for when you need some downtime too!

Mark Escubio

Windows 10 / Lenovo Yoga 910

For me, the Xbox Play Anywhere is a great new feature as it allows you to play your current Xbox games with higher resolutions and better graphics without forking out extra cash for another copy. Although available titles are still scarce, but I’m sure it will grow in time.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?