Feeds

Uh oh! Here comes the first bug in the Windows 8.1 Update

Fortunately, it only affects Windows Server Update Services customers

Top three mobile application threats

Microsoft has suspended distribution of April's Windows 8.1 Update to some enterprise customers after a bug was discovered that could bork affected machines' ability to receive future updates.

The issue affects businesses that distribute software updates via Windows Server Update Services (WSUS) 3.0 Service Pack 2, which shipped with Windows Server 2008 R2 but can also be used with earlier versions of Windows Server.

After installing the Windows 8.1 Update, affected PCs will try to contact their WSUS servers using the TLS 1.2 secure communications protocol. But because TLS 1.2 support is not enabled on WSUS 3.0 SP2 by default – that version defaults to the older SSL protocol – in many cases these attempts will fail, and the PCs will no longer be able to receive future software updates.

This unfortunate side effect is delivered in Windows update KB2919355, the 707MB code chunk that makes up the majority of the Windows 8.1 Update set of patches.

Systems admins have a couple of workarounds available to resolve the problem, at least temporarily. First, if they're running WSUS 3.0 SP2 on Windows Server 2008 R2, they can enable TLS 1.2 support via some Registry tweaks. A Microsoft Knowledge Base article explains how.

Earlier versions of Windows Server, however, lack support for TLS 1.2. In these cases, the only way to re-enable software updates is to disable HTTPS in WSUS 3.0 SP2 and ship updates to PCs unencrypted.

Redmond says – with some small irony – that it's working on a software update that will restore proper behavior for all supported versions of WSUS, though it hasn't said when to expect that update to arrive.

Until then, Microsoft will no longer be distributing update KB2919355 to WSUS servers, and the only way for customers in WSUS environments to get the Windows 8.1 Update will be to download it from the Windows Update Catalog or from MSDN. ®

Mobile application security vulnerability report

More from The Register

next story
NO MORE ALL CAPS and other pleasures of Visual Studio 14
Unpicking a packed preview that breaks down ASP.NET
Cheer up, Nokia fans. It can start making mobes again in 18 months
The real winner of the Nokia sale is *drumroll* ... Nokia
Mozilla fixes CRITICAL security holes in Firefox, urges v31 upgrade
Misc memory hazards 'could be exploited' - and guess what, one's a Javascript vuln
Put down that Oracle database patch: It could cost $23,000 per CPU
On-by-default INMEMORY tech a boon for developers ... as long as they can afford it
Google shows off new Chrome OS look
Athena springs full-grown from Chromium project's head
Apple: We'll unleash OS X Yosemite beta on the MASSES on 24 July
Starting today, regular fanbois will be guinea pigs, it tells Reg
HIDDEN packet sniffer spy tech in MILLIONS of iPhones, iPads – expert
Don't panic though – Apple's backdoor is not wide open to all, guru tells us
prev story

Whitepapers

Top three mobile application threats
Prevent sensitive data leakage over insecure channels or stolen mobile devices.
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.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Designing a Defense for Mobile Applications
Learn about the various considerations for defending mobile applications - from the application architecture itself to the myriad testing technologies.
Build a business case: developing custom apps
Learn how to maximize the value of custom applications by accelerating and simplifying their development.