Telnet flaw in Windows 2000 could mean denial of service

If you don't succeed the first seven times, try, try (and try some more) again. That seems to be the lesson Friday as Microsoft acknowledged new vulnerabilities in the Telnet code included in Windows 2000, eight months after issuing a patch that fixed seven other security holes in Windows 2000's Telnet.

A buffer overflow attack -- an attack in which the amount of memory allotted to an application is overrun -- against the Telnet service could cause a denial of service, or in some cases, allow the attacker to run any code they wanted in Windows 2000 or Interix 2.2, Microsoft said in its alert. Telnet is a common line program often used for remote access to systems. Interix is a program that allows users to run Unix applications in Windows 2000. Microsoft has issued a patch that fixes the problem in both applications.

However. the security hole does have some mitigating features which could minimize its impact, the company said. First, if attack code is run, it will only run with the level of permission given to the Telnet service. Second, Telnet is not turned on by default in Windows 2000 and would have be turned on to make a system vulnerable. Finally, Telnet is not installed by default in Interix and would have to be intentionally installed to make a system vulnerable.

In June 2000, Microsoft issued a patch that plugged seven security holes in Windows 2000's Telnet service, including serious holes that could have led to Denial of Service attacks.

More information about the bug, and the download for the patch, can be found athttp://www.microsoft.com/technet/security/bulletin/ms02-004.asp

Join the PC World newsletter!

Error: Please check your email address.

Struggling for Christmas presents this year? Check out our Christmas Gift Guide for some top tech suggestions and more.

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

Most Popular Reviews

Follow Us

Best Deals on GoodGearGuide

Shopping.com

Latest News Articles

Resources

GGG Evaluation Team

Kathy Cassidy

STYLISTIC Q702

First impression on unpacking the Q702 test unit was the solid feel and clean, minimalist styling.

Anthony Grifoni

STYLISTIC Q572

For work use, Microsoft Word and Excel programs pre-installed on the device are adequate for preparing short documents.

Steph Mundell

LIFEBOOK UH574

The Fujitsu LifeBook UH574 allowed for great mobility without being obnoxiously heavy or clunky. Its twelve hours of battery life did not disappoint.

Andrew Mitsi

STYLISTIC Q702

The screen was particularly good. It is bright and visible from most angles, however heat is an issue, particularly around the Windows button on the front, and on the back where the battery housing is located.

Simon Harriott

STYLISTIC Q702

My first impression after unboxing the Q702 is that it is a nice looking unit. Styling is somewhat minimalist but very effective. The tablet part, once detached, has a nice weight, and no buttons or switches are located in awkward or intrusive positions.

Latest Jobs

Shopping.com

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?