Cisco warns of bug in desktop software

Cisco is warning users of a flaw in its Security Agent software that could be used to run unauthorized software on a Windows PC.

Cisco is advising Windows users of its Cisco Security Agent software to upgrade the product because of a security bug.

The flaw lies in a driver used by the client software. By sending maliciously crafted data to the PC, attackers could create a buffer overflow condition in the Windows kernel, causing the system to crash.

Security firm Secunia rates the crash flaw "moderately critical," but the vulnerability could be used by attackers to also run unauthorized software on the Windows machine, Cisco warned.

Cisco released hotfixes for the bug on Wednesday. A large number of Cisco products install this agent, including the Cisco Security Manager, Cisco Unified Communications Manager and the Cisco Voice Portal.

If attackers find a way to exploit this flaw to run code, it could become a serious security problem.

"Back in 2004, such a vulnerability would probably have led to a flurry of noisy network worms," wrote Daniel Wesemann, a handler with the SANS Internet Storm Center, in a blog posting. "Today, drive-by installs of spyware are more likely, but at least as damaging. The bottom line is still the same: If you are using the vulnerable component, patch as soon as possible."

The buffer overflow can be caused by sending a malicious TCP (Transmission Control Protocol) packet to ports 139 or 445, the ports used by the Microsoft Server Message Block file-sharing protocol.

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

Robert McMillan

IDG News Service

Comments

Comments are now closed.

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

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?