Feeds

LinkedIn snarfing contacts from Exchange

Default server settings surrender data to social network

Next gen security for virtualised datacentres

Update LinkedIn offers lots of chances for its users to hand over credentials so the social business network can suggest new connections. But a new offer to do so for Microsoft Outlook means contacts can be sucked out of Microsoft Exchange and exposed to the world.

Australian sysadmin Adam Fowler noticed the feature and detailed its behaviour in a blog post that explains what happened when he create a test account on the Exchange server he administers:

“I tried this with a test account, entering the username and temporary password. It then asked for further information, which was the address for the Outlook webmail link and then connected and started showing contacts.

LinkedIn on this page says 'We'll import your address book to suggest connections and help you manage your contacts. And we won't store your password or email anyone without your permission'.”

Fowler's point is that users who innocently expose their contacts to LinkedIn are exposing Exchange Servers to a third party, which isn't a good idea. That LinkedIn can access the names and details of Contacts stored in a business' system – and perhaps gathered solely for business purposes – is also a worry as it enables a third party to understand links between two people that may not otherwise be made public.

And as Fowler points out, LinkedIn doesn't have the world's greatest security record.

Happily, Fowler has found that some tweaks to Exchange prevent LinkedIn from accessing contacts.

Here's his advice:

“There are a few settings to check. First, under the Set-OrganizationConfig area, you'll need to check that EwsApplicationAccessPolicy is set to 'EnforceBlockList'. If it's not, it's going to be 'EnforceAllowList' and you're probably OK, as it's using a whitelist for access to only what's listed rather than a blacklist, to only block what's listed. Next, you need to add LinkedIn into the BlockList. This is done with the command 'Set-OrganizationConfig -EwsBlockList LinkedInEWS'

The Reg has asked LinkedIn to comment on whether it is appropriate for its Outlook connection service to reach into Exchange servers and will update this story if a response is offered. ®

Update

LinkedIn has contacted us with the following statement:

"We take the privacy and security of our members’ data very seriously. Accordingly, the functionality of importing contacts from Outlook is an opt-in feature that allows members to add connections. We have also proactively provided instructions for Corporate IT managers to disable the ability for employees at companies to import contacts from their work email accounts and you can find more information here.”

We've also heard from Exchange Expert Paul Cunningham, who has detailed his own explorations of this "feature" and found LinkedIn doesn't just look at Contacts, but also reads Sent Mail messages and hoovers them up.

The essential guide to IT transformation

More from The Register

next story
Goog says patch⁵⁰ your Chrome
64-bit browser loads cat vids FIFTEEN PERCENT faster!
Chinese hackers spied on investigators of Flight MH370 - report
Classified data on flight's disappearance pinched
NIST to sysadmins: clean up your SSH mess
Too many keys, too badly managed
Scratched PC-dispatch patch patched, hatched in batch rematch
Windows security update fixed after triggering blue screens (and screams) of death
Researchers camouflage haxxor traps with fake application traffic
Honeypots sweetened to resemble actual workloads, complete with 'secure' logins
Attack flogged through shiny-clicky social media buttons
66,000 users popped by malicious Flash fudging add-on
prev story

Whitepapers

Top 10 endpoint backup mistakes
Avoid the ten endpoint backup mistakes to ensure that your critical corporate data is protected and end user productivity is improved.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Backing up distributed data
Eliminating the redundant use of bandwidth and storage capacity and application consolidation in the modern data center.
The essential guide to IT transformation
ServiceNow discusses three IT transformations that can help CIOs automate IT services to transform IT and the enterprise
Next gen security for virtualised datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.