Flaw in Front Page on MS IIS can lead to trouble

A flaw in Microsoft's Internet Information Server (IIS) versions 4 and 5 - software used to run an estimated 6 million Web servers worldwide - can let an attacker execute code of his choice on the server, the company said Friday. The security hole is the second found in IIS this week and at least the fourth identified since the beginning of May.

A flaw in Microsoft's Internet Information Server (IIS) versions 4 and 5 - software used to run an estimated 6 million Web servers worldwide - can let an attacker execute code of his choice on the server, the company said Friday. The security hole is the second found in IIS this week and at least the fourth identified since the beginning of May.

This hole results from a vulnerability in a component of the Front Page Server Extensions (FPSE) which ship with IIS; Front Page is Microsoft's visual Web page builder and uses special server extensions to provide additional functionality. The component, the Visual Studio RAD (Remote Application Deployment), is an optional tool not installed by default with either FPSE or IIS and is used to help developers create software faster and easier.

The bug in the component would allow an attacker using a specially-designed packet to overflow the tool's memory buffer and run code of his choice. Normally that code would only be run in a mode that would restrict the damage it could do, but certain circumstances can let the code run in a more powerful context that make the system more vulnerable, the company said.

Microsoft does warn users that the Visual Studio RAD component should not be installed on Web servers in public use and warns users at the time of installing the component that it should be used only for internal development. The user must click past the warning in order to install the component, the company said.

Front Page Server Extensions are included in Office 2000, Office XP, Windows Server 2000, Windows Advanced Server 2000 and can be installed on Windows NT 4. The bug was discovered by Chinese security firm NSFocus Information Technology Co.

Earlier in the week, Microsoft said that a flaw in IIS could allow an attacker to take full control of an affected Web server. Two other flaws found since May allowed server compromises or Denial of Service attacks.

The bulletin and patch for the flaw can be found at http://www.microsoft.com/technet/treeview/default.asp?url=/technet/security/bulletin/ms01-035.asp

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

Sam Costello

PC World
Show Comments

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

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.

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.

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?