SharePoint Defense in Depth

A community site for SharePoint security and compliance issues

About this community

SharePoint Defense in Depth is an open community site and resource for those interested in security, defense in depth, compliance, and SharePoint. This community site provides a place to pose questions to experts, and to learn how best to tackle your SharePoint security challenges.

For access to resources including a SharePoint Content Scanner, and SharePoint Risk Assessment, please create a login. Note that to limit spam and non-useful content on this site, we require either a valid corporate e-mail domain, or a legitimate LinkedIn profile for registrants before approving access.

Our simple goal is to provide the SharePoint community with tools and resources that enable you to more effectively secure your SharePoint environments. We encourage you to engage, and post your own tips, tricks, and resource to help make SharePoint sites more secure. If you have ideas as to how we can make the SharePoint Defense in Depth site a better community resource, please contact us on: info@sharepointdefenseindepth.com.

Blog Posts

Video demonstration of the content scanner

Posted by Mike Fleck on July 18, 2016 at 9:53am 0 Comments

If you came to SharePointDefenseInDepth looking for complimentary access to the data discovery tool (Content Scanner), you can request your copy by reaching out to info@cipherpoint.com. If you'd like to learn more about how to use the scanner and what it can locate check out this video on Vimeo. The first minutes minutes is background material so don't worry if you heard the audio but the video doesn't seem to be moving. …

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Understanding file encryption in Office 365

Posted by Mike Fleck on March 8, 2016 at 12:01pm 0 Comments

In early 2015 Microsoft started rolling out per file encryption for SharePoint Online and OneDrive for Business in Office 365. Prior to that, the file encryption capability in Office 365 was simple BitLocker storage encryption. The newer approach, often referred to as Fort Knox, involved breaking files into fragments and encrypting each file fragment with a unique encryption key. Microsoft sometimes refers to this fragmenting of files as “shredded storage.” The fragment encryption keys (FEK)…

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Reimagining a New Security Model for SharePoint

Posted by Peter Bradley on January 6, 2016 at 5:00pm 0 Comments

SharePoint's old security model was conceived in a different era. Let's imagine what a new security model might look like.

In my last post, we looked at the humble beginnings of SharePoint as Microsoft Tahoe, and pointed out that the security…

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The free SharePoint Content Scanner is back

Posted by Mike Fleck on December 18, 2015 at 12:57pm 0 Comments

CipherPoint is once again providing free access to the content scanner.Yes, Office 365 has Data Loss Prevention but there are few reasons why you would be interested in this tool vs. the one from Microsoft.

  1. The CipherPoint scanner lets you create custom patterns to find.
  2. The CipherPoint scanner can search for sensitive content in on-premises AND Office 365 at the same time.
  3. The CipherPoint scanner is a lot easier to use.

To get the scanner you…

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Events

Videos

Forum

Take the CipherPoint's Annual State of Collaboration Security Survey

Started by Mike Fleck in General security topics Jul 14, 2014. 0 Replies

Each year, CipherPoint conducts a survey to understand businesses’ top security concerns relating to file…Continue

Government Agencies Deploying SharePoint Despite the Lack of FIPS 140-2 Level Validation

Started by K Nahbrha in Industry compliance. Last reply by Mike Fleck Dec 6, 2013. 1 Reply

How are government agencies deploying SharePoint 2010 despite the fact that SharePoint does not support FIPS 140-2 level validation as required by NIST?The operating system that hosts SharePoint must…Continue

Tags: DISA, Cryptography, NIST, 2010, SharePoint

Securing SharePoint

Started by Site Admin in General security topics Aug 16, 2013. 0 Replies

A reader posted this response to a blog we posted on the Snowden breach, and the SharePoint connection. What do you think...can SharePoint be securely deployed?JimOur blog is here:…Continue

Is anyone using RMS and SharePoint 2013?

Started by Mike Fleck in General security topics. Last reply by Kirk Hasty Jul 22, 2013. 1 Reply

One of our members just posted the above question in his status. Is anyone here using Windows Rights Management (or third party RMS provider) with *any* version of SharePoint? If so, please post your…Continue

Tags: 2013, sharepoint, management, rights

Challenges Securing SharePoint Against Privileged Insiders

It is well documented at this point that some leaked Wikileaks data came from SharePoint sites. Details have emerged regarding how the data relating to the PRISM breach was obtained, and this breach, like Wikileaks, also involved SharePoint.

To provide some structure for this discussion, we’ll break the discussion into three types of collaboration platforms: legacy file servers, on-premises SharePoint sites, and cloud collaboration platforms such as Office 365 and SharePoint Online.

Legacy file servers

Insider security threats in legacy file server environments include classic systems administrator issues (excessive permissions, inability to enforce need to know, lack of separation of duties). Third party products exist that can help add a layer of security control to these environments. These products enforce need to know by using an independent access control and encryption capability, which is usually managed by IT security or by the business manager (data owner).

On-premises SharePoint

Purpose-built collaboration platforms such as SharePoint bring a multitude of security issues, many of which depend on the use case, and the deployment model.

For example, SharePoint when deployed as an intranet collaboration system presents a different set of potential security threats versus SharePoint as an extranet collaboration platform. Regardless, however, it’s hard to argue that the SharePoint platform, out of the box, has sufficient security controls to prevent insiders from accessing sensitive information that they have no valid “need to know” for.

Even if you implement background checks and other process-based controls to mitigate insider threats, consider that administrator credentials are among the most prized targets by external attackers. Given the porous nature of perimeter-only security defenses today, implementing technical security controls that limit the damage that can be done from compromised system administrator accounts is just smart security (and part of a defense in depth strategy). It’s also worth acknowledging that systems administrators frequently take the path of least resistance, by combining service accounts and privileges. This can easily lead to a situation where the sysadmin’s credentials are literally the “keys to the kingdom.”

Locking down premise SharePoint sites requires an additional layer of access control and encryption.

Cloud Collaboration (Office 365, SharePoint Online)

Cloud collaboration systems bring a different set of security issues. Whether SaaS or IaaS, it’s impossible to ignore the fact that in external cloud services, outsiders (in the form of cloud service provider system administrators) are your new insiders (and insider threat).

Here’s an article that describes the havoc that can be brought by a rogue cloud service provider system administrator.

As with premise file servers and SharePoint sites, applying encryption and access control to data stored in cloud collaboration systems is the only way (from a technical control standpoint) to protect access to sensitive data. There are a number of different technical approaches to securing cloud data. Future articles will explore the various ways to do this.

 

By Mike Fleck, CEO

CipherPoint

 

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