Home Cyber Security News Three Critical Risk Vulnerabilities Discovered on Cisco Devices

Three Critical Risk Vulnerabilities Discovered on Cisco Devices

by Harikrishna Mekala

Cisco has issued 16 security warnings on May 16th among them there are three vulnerabilities that are rated as critical and have received 10/10 severity score. These three vulnerabilities have a backdoor and two bypasses of authentication used in Cisco’s Digital Network Architecture Center. The Cisco DNA Center is a piece of software that is currently focused on enterprise clients and provides the central system for designing and deploying device configurations within a large network of devices. The software is complex according to the company but a recent internal audit has revealed a big security flaw in the system.


The CVE-2018-0222 is the easiest to take advantage. The company describes this flaw as  “undocumented, static user credentials or the default administrative account”. Which in layman’s terms is a backdoor account in the system! Although the company didn’t provide the default username and password, this vulnerability grants the attacker with root privileges to the system. The Network Administrators are issued with a security patch to remove these accounts ASAP.


The CVE-2018-0268 targets the authentication of Kubernetes container management system which is a subsystem embedded inside the Cisco’s DNA Center. “An attacker who has the ability to access the Kubernetes service port could execute commands with elevated privileges within provisioned containers,” Cisco said. “A successful exploit could result in a complete compromise of affected containers.”

There are no workarounds on this flaw and the system administrators need to update with the latest Cisco’s patch to fix this vulnerability.


CVE-2018-0271 tries to bypass the Cisco’s DNA Center’s API gateway. “The vulnerability is due to a failure to normalize URLs prior to maintaining requests,” Cisco explained. “An attacker could exploit this vulnerability by presenting a crafted URL designed to exploit the issue. A successful exploit could allow the attacker to gain unauthenticated access to critical services, resulting in elevated privileges in DNA Center.”

The company fixed all of the issues by providing an update to its enterprise software. The company has conducted massive internal audits to discover these vulnerabilities. Cisco decided to hunt and root out any similar backdoors before attackers found them first.

Take your time to comment on this article.

You may also like

Latest Hacking News

Privacy Preference Center


The __cfduid cookie is used to identify individual clients behind a shared IP address and apply security settings on a per-client basis.

cookie_notice_accepted and gdpr[allowed_cookies] are used to identify the choices made from the user regarding cookie consent.

For example, if a visitor is in a coffee shop where there may be several infected machines, but the specific visitor's machine is trusted (for example, because they completed a challenge within your Challenge Passage period), the cookie allows Cloudflare to identify that client and not challenge them again. It does not correspond to any user ID in your web application, and does not store any personally identifiable information.

__cfduid, cookie_notice_accepted, gdpr[allowed_cookies]


DoubleClick by Google refers to the DoubleClick Digital Marketing platform which is a separate division within Google. This is Google’s most advanced advertising tools set, which includes five interconnected platform components.

DoubleClick Campaign Manager: the ad-serving platform, called an Ad Server, that delivers ads to your customers and measures all online advertising, even across screens and channels.

DoubleClick Bid Manager – the programmatic bidding platform for bidding on high-quality ad inventory from more than 47 ad marketplaces including Google Display Network.

DoubleClick Ad Exchange: the world’s largest ad marketplace for purchasing display, video, mobile, Search and even Facebook inventory.

DoubleClick Search: is more powerful than AdWords and used for purchasing search ads across Google, Yahoo, and Bing.

DoubleClick Creative Solutions: for designing, delivering and measuring rich media (video) ads, interactive and expandable ads.



The _ga is asssociated with Google Universal Analytics - which is a significant update to Google's more commonly used analytics service. This cookie is used to distinguish unique users by assigning a randomly generated number as a client identifier. It is included in each page request in a site and used to calculate visitor, session and campaign data for the sites analytics reports. By default it is set to expire after 2 years, although this is customisable by website owners.

The _gat global object is used to create and retrieve tracker objects, from which all other methods are invoked. Therefore the methods in this list should be run only off a tracker object created using the _gat global variable. All other methods should be called using the _gaq global object for asynchronous tracking.

_gid works as a user navigates between web pages, they can use the gtag.js tagging library to record information about the page the user has seen (for example, the page's URL) in Google Analytics. The gtag.js tagging library uses HTTP Cookies to "remember" the user's previous interactions with the web pages.

_ga, _gat, _gid