Lync 2013 / SfB 2015 Client Security Update – March 2017

By my reading it’s been 5 months since our last security update to the Office 2013-based Lync/SfB client, and this one takes us from 15.0.4903.1001 to 15.0.4911.1000. It’s listed as Critical as there’s the risk of remote code execution.

Kb 4013075 “This security update resolves vulnerabilities in the Microsoft Graphics Component on Microsoft Windows, Microsoft Office, Skype for Business, Silverlight and Microsoft Lync. These vulnerabilities could allow remote code execution if a user either visits a specially crafted website or opens a specially crafted document.

To learn more about the vulnerability, see Microsoft Security Bulletin MS17-013.

What’s Fixed

This security update also contains fixes for the following nonsecurity issues:

  • Kb 4013150 EWS connection issue after migrating mailbox to Exchange Online Dedicated vNext in Skype for Business 2015 (Lync 2013)
  • Kb 4013149 Update to support dedicated URLs of Black Forest and ITAR in Skype for Business 2015 (Lync 2013)

What’s New / Changed

Nothing documented.

Known Issues

None documented.

Pre-Req’s

There are no changes here from recent updates, so if you’re already current you only need the patch itself, below under “Download”. If however your patching isn’t to current, then you’ll need to check you have *all* of these pre-req’s. The Office 2013 SP1 requirement still applies if you’re using Outlook 2010. (Lync 2013 in all of its flavours – e.g. Lync Basic – is still a component of Office 2013).

Update

Download

Current Version

Released

Update for Office 2013 (KB3054853) (NOTE 1 BELOW) 1.0 9 June 2015
LyncHelpLoc (Kb3039776) 1.0 1 December 2015
Microsoft Office 2013 Language Pack Service Pack 1 (KB2817427) 1.0 13 February 2014

 

NOTE1: “You do not have to apply update KB3054853 if you applied the April 14, 2015, update (KB2889923) or the May 12, 2015, security update (KB3039779) for Lync 2013 (Skype for Business)”

Download

This is the client fix itself:

  • x86 (lync2013-kb3172539-fullfile-x86-glb.exe)
  • x64 (lync2013-kb3172539-fullfile-x64-glb.exe)

Reboot

I have all the pre-req’s already installed, so a reboot was not required. I was however running Outlook 2013 at the time and I was prompted to exit it, to which I duly complied.

Before / After

Before

After

SfB 15.0.4903.1000 MSO 15.0.4893.1000 SfB 15.0.4911.1000 MSO 15.0.4893.1000
BeforeLync2013March2017ClientSecurityUpdate AfterLync2013March2017ClientSecurityUpdate

 

Revision History

15th March 2017: This is the initial post.

 

– G.

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