Cisco patches serious flaws in router and conferencing server software

The patches fix flaws in Cisco IOS, IOS XR, ASR 5000, WebEx Meetings Server and Cisco Meeting Server

Cisco Systems released patches this week for several vulnerabilities in its IOS software for networking devices and the Cisco and WebEx conferencing servers.

The most serious vulnerability affects the Cisco IOS XR software for the Cisco Network Convergence System (NCS) 6000 Series Routers. It can lead to a denial-of-service condition, leaving affected devices in a nonoperational state.

Unauthenticated, remote attackers can exploit the vulnerability by initiating a number of management connections to an affected device over the Secure Shell (SSH), Secure Copy Protocol (SCP) or Secure FTP (SFTP).

Because it can affect the availability of a critical piece of equipment, like a router, Cisco has rated this vulnerability as high severity. There is no workaround and customers are advised to install the newly released patches.

Another flaw fixed in the Cisco IOS XR software could allow attackers to execute arbitrary commands on the operating system with root privileges. This vulnerability affects IOS XR Software Release 6.0.1.BASE and was rated medium severity because the attacker needs to be authenticated as a local user.

A denial-of-service vulnerability was also fixed in the Cisco IOS Software. It can be used to crash devices running affected versions of the software by sending specially crafted Link Layer Discovery Protocol (LLDP) packets to them. Exploitation doesn't require authentication, but requires the attacker to be in a position to send LLDP packets.

The firmware of Cisco ASR 5000 Series carrier-class platform which is used in 3G and LTE networks, received an update that fixes an insecure SNMP (Simple Network Management Protocol) implementation. The weakness would have allowed attackers to read and modify the device configuration.

Cisco's meeting servers were also the focus of this week's patch releases. One vulnerability in the HTTP interface of the Cisco Meeting Server, formerly Acano Conferencing Server, could have allowed attackers to launch persistent cross-site scripting (XSS) attacks against users of the interface.

Attackers could exploit this flaw by tricking users to click on maliciously crafted links and could then execute rogue JavaScript code in their browsers in the context of the Cisco Meeting Server interface. This could be used to steal authentication cookies or to force them to perform unauthorized actions.

Two XSS vulnerabilities were also fixed in the Cisco WebEx Meetings Server version 2.6, one in its administration interface and one in the user interface. Both could be exploited by tricking users to visit specially crafted links and could lead to further attacks.

The Cisco WebEx Meetings Server also received patches for an SQL injection vulnerability that could allow attackers to extract information from its database and for a command injection flaw.

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.

Lucian Constantin

IDG News Service
Show Comments

Father’s Day Gift Guide

Most Popular Reviews

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?