Cisco warns of four WLAN controller vulnerabilities

Three denial-of-service attack vulnerabilities and one that could allow a restricted user to gain full administrative rights to the controller.

Cisco Wednesday issued a security alert warning of a quartet of vulnerabilities affecting all of its wireless LAN controllers, including the Catalyst 6500 and 7600 wireless modules, with software version 4.2 or higher.

Three are denial-of-service attacks. The fourth, specific to one particular software version, could allow a restricted user to gain full administrative rights to the controller. The DoS attacks could cause the controllers to hang or reload, with repeated attacks creating a sustained service denial condition, according to the alert.

No workarounds for these vulnerabilities exist. But Cisco has posted software patches for all four of them.

[Compare enterprise WLAN products with our online Wireless & Mobile Product Guide]

Two of the DoS attacks are aimed at Web authentication. In one instance, the attacker can use a vulnerability scanner to cause the controller to stop servicing Web authentication for wireless clients, or cause the controller to reload. The second can trigger a controller reload by sending a malformed post to the Web authentication "login.html" page.

The third DoS attack involves the controller receiving "certain IP packets" that trigger a "DoS condition," causing the controller to become unresponsive. This is limited to software version 4.1 in the 4400 series, Catalyst 6500 Wireless Services Module, and 3750 Integrated Wireless LAN Controllers.

The last attack, classed as a "privilege escalation vulnerability," exists only in controller software version 4.2.173.0. A successful exploitation may allow an unauthenticated user to gain full administrative rights to the targeted controller.

Join the Good Gear Guide newsletter!

Error: Please check your email address.

Tags WLANcisco

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.

John Cox

Network World

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?