Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Network Security //

SDN

1/23/2019
09:35 AM
Dan Rasmussen
Dan Rasmussen
News Analysis-Security Now
50%
50%

In the Cloud, SD-WAN Provides Security at the Edge

As businesses move to the cloud, remote locations are relying more and more on SD-WAN. However, this change means a different approach to security. Here's why enterprises should look to the edge.

As businesses everywhere transition their application and business processes to the cloud, a parallel acceleration of software-defined wide area network (SD-WAN) adoption is also underway.

A recent study found 53% of distributed enterprises plan to implement SD-WAN in the next two years to maximize bandwidth, improve analytics and automate application prioritization.

However, in the rush to adopt SD-WAN solutions, many enterprises inadvertently risk their networks -- and their data -- by presuming all SD-WAN technologies include appropriate security. In fact, Fortinet research indicates that 90% of SD-WAN solutions employ only basic security with a stateful firewall.

A more robust approach to SD-WAN security would mitigate risk and maximize the benefits of cloud-based applications within a cloud-enabled enterprise network.

A large distributed network that allows individual branch sites to access cloud-based services and apps poses significant risks. Applications, such as WiFi, mobile point-of-sale (POS) and digital employee training portals, invite users to access network infrastructure, exponentially increasing the peril of a security breach through Internet-based broadband circuits.

Attackers often exploit this weakness to attack highly distributed organizations, with Gartner estimatingthat more than 30% of advanced threats originate at branch locations.

There are two approaches to improve security within an SD-WAN: cloud-centric and edge-centric.

These two security strategies suit the new networking model, in which businesses migrate to the cloud and away from the central security that came with using the company data center.

However, there are advantages to leveraging an edge-centric security approach versus relying on the cloud.

Enterprises opting for a cloud-based security approach should heed some cautions. With the continuing trend of more cloud-based applications being used across the branch location, organizations need tighter security on internal traffic patterns to prevent malware or insider threats.

In a cloud-based security approach, creating a security layer between the user and the cloud requires all traffic be routed to the cloud service for scanning and scrubbing. This also requires network availability for security to function. For instance, should the WAN go down for any reason, data is protected with only the most basic security protocols. Cloud-based security also crowds the network, which not only slows traffic but drives up costs due to greater bandwidth consumption.

Finally, a cloud-based approach may neglect individual site security, making it difficult to identify and neutralize local threats to the broader network.

Conversely, an edge-based approach to security creates an inherently distributed security model, removing the risk of a significant breach resulting from a single point of failure.

Failure within any enterprise site or application has the potential to result in a major outage for the organization, however, because edge security is enforced locally at every endpoint in the network, that risk is mitigated. Placing security closest to where the vulnerabilities lie also allows scrubbing traffic that is wholly local to the site or travels site-to-Internet.

This kind of local, east-west traffic in an enterprise setting can include table-to-POS orders in a restaurant or security camera feeds in a retail environment. Edge security scrubs data in both directions -- ensuring that bad information or data is kept out of the site, and that any information that should be protected is either prevented from leaving or secured before being sent out.

When configuring SD-WAN for the enterprise, investing in edge security often will save money and headaches over the long term, specifically by minimizing costs due to bandwidth demand and mitigating security threats before they become larger, potentially more costly breaches.

Currently, about 77% of enterprises have at least one application or a portion of their computing infrastructure in the cloud, according to the 2018 IDG Cloud Computing study. As businesses seek to meet intensifying network demand, many charge ahead with tools, ranging from cloud-based applications to SD-WAN.

But protecting sensitive data requires vigilance and a careful, informed approach to network security. Combined with various layers of protection, including Unified Threat Management (UTM) and next-generation firewall (NGFW), edge security is the most reliable way to ensure maximum protection for an enterprise SD-WAN deployment.

Related posts:

Dan Rasmussen is the senior vice president of the Enterprise Business Unit for North America at Hughes Network Systems..

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
COVID-19: Latest Security News & Commentary
Dark Reading Staff 9/25/2020
Hacking Yourself: Marie Moe and Pacemaker Security
Gary McGraw Ph.D., Co-founder Berryville Institute of Machine Learning,  9/21/2020
Startup Aims to Map and Track All the IT and Security Things
Kelly Jackson Higgins, Executive Editor at Dark Reading,  9/22/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
Special Report: Computing's New Normal
This special report examines how IT security organizations have adapted to the "new normal" of computing and what the long-term effects will be. Read it and get a unique set of perspectives on issues ranging from new threats & vulnerabilities as a result of remote working to how enterprise security strategy will be affected long term.
Flash Poll
How IT Security Organizations are Attacking the Cybersecurity Problem
How IT Security Organizations are Attacking the Cybersecurity Problem
The COVID-19 pandemic turned the world -- and enterprise computing -- on end. Here's a look at how cybersecurity teams are retrenching their defense strategies, rebuilding their teams, and selecting new technologies to stop the oncoming rise of online attacks.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-15208
PUBLISHED: 2020-09-25
In tensorflow-lite before versions 1.15.4, 2.0.3, 2.1.2, 2.2.1 and 2.3.1, when determining the common dimension size of two tensors, TFLite uses a `DCHECK` which is no-op outside of debug compilation modes. Since the function always returns the dimension of the first tensor, malicious attackers can ...
CVE-2020-15209
PUBLISHED: 2020-09-25
In tensorflow-lite before versions 1.15.4, 2.0.3, 2.1.2, 2.2.1 and 2.3.1, a crafted TFLite model can force a node to have as input a tensor backed by a `nullptr` buffer. This can be achieved by changing a buffer index in the flatbuffer serialization to convert a read-only tensor to a read-write one....
CVE-2020-15210
PUBLISHED: 2020-09-25
In tensorflow-lite before versions 1.15.4, 2.0.3, 2.1.2, 2.2.1 and 2.3.1, if a TFLite saved model uses the same tensor as both input and output of an operator, then, depending on the operator, we can observe a segmentation fault or just memory corruption. We have patched the issue in d58c96946b and ...
CVE-2020-15211
PUBLISHED: 2020-09-25
In TensorFlow Lite before versions 1.15.4, 2.0.3, 2.1.2, 2.2.1 and 2.3.1, saved models in the flatbuffer format use a double indexing scheme: a model has a set of subgraphs, each subgraph has a set of operators and each operator has a set of input/output tensors. The flatbuffer format uses indices f...
CVE-2020-15212
PUBLISHED: 2020-09-25
In TensorFlow Lite before versions 2.2.1 and 2.3.1, models using segment sum can trigger writes outside of bounds of heap allocated buffers by inserting negative elements in the segment ids tensor. Users having access to `segment_ids_data` can alter `output_index` and then write to outside of `outpu...