October 25, 2007

Microsoft's OneCare silently changes Automatic Updates

Many Windows XP and Vista users were mystified when their Automatic Updates settings were changed without approval, and a researcher thinks OneCare is to blame

Microsoft's consumer security software changes the AU (Automatic Updates) settings in Windows XP and Vista without telling users or getting their approval, a researcher said Thursday -- behavior that may explain recent reports of patches being installed and systems rebooting without permission.

When Microsoft responded to new charges of silent changes last week, however, it denied that AU settings were ever altered without user approval, and it didn't mention OneCare as a possible culprit.

Scott Dunn, an editor at the "Windows Secrets" newsletter, reported Thursday morning that OneCare silently changes AU settings as it installs. No matter what AU setting the user selected previously, OneCare's installer quietly changes it to the fully automatic option.

"Some security products have turned on AU in the past," said Dunn, who also tested several other current consumer suites, including Symantec's Norton 360 and Norton Internet Security, McAfee's Internet Security Suite, and Check Point Software's ZoneAlarm Internet Security Suite. "But OneCare was the only guilty party."

OneCare's willful way with AU may be an explanation for the reports two weeks ago of machines downloading and installing the Oct. 9 set of security fixes even though their owners had explicitly instructed Windows to ignore all downloads or notify them before they were installed.

Several days later, after it wrapped up an investigation, Microsoft said AU settings were never changed without user consent, and it blamed absent-minded users for making modifications and then forgetting that they had.

"I find this surprising and very disturbing," said Dunn. "If they're going to change [AU] settings, they should let you know."

Four options, down to one
In both Windows XP and Vista, users can select from four options in AU: Download and install all updates automatically; download files but do not install them without user consent; check for but neither download nor install without permission; and disable Automatic Updates entirely.

OneCare, sold for $49.95 and offered as a free 90-day trial, sets AU to the first, and all-automatic, setting, said Dunn, on both operating systems. "It does that even if Automatic Updates is completely disabled," he added. If users later uninstall OneCare -- for instance, after a trial has expired -- the software does not return the machine to the earlier settings; they must be reset by the user.

"Worse, OneCare silently turns on [Windows] services that have been disabled by the user," Dunn said, referring to the two services that some users, frustrated at earlier incidents in which Windows retrieved and installed patches without permission, have manually turned off: Automatic Updates and Background Intelligent Transfer Service. The services can be switched off manually using the Windows services.msc utility. Normally, once disabled, they remain that way until the user manually turns them back on.

ComputerWorld confirmed Dunn's account of OneCare's AU changes by installing the security suite on both Windows XP and Windows Vista.

Close

On Twitter now

Security

Powered by Twitter

On Twitter now

White Paper

D2D Virtual Tape Library Replication Primer

This whitepaper explains the terminology and concepts behind Data Replication technologies and establishes some sizing rules through worked examples. Learn the new paradigm in disaster tolerance—protect data anywhere.

Download now »

White Paper

An Alternative to Virtualization for Datacenter Cost Savings

Server virtualization is a popular option for dealing with mounting datacenter costs. Another equally promising approach is the use of an Application Delivery Controller. Citrix NetScaler provides a low-cost way for organizations to reduce their server count and accrue cost savings from a reduction in space, cooling, power and personnel.

Download now »

White Paper

Why Your Firewall, VPN, and IEEE 802.11i Aren't Enough to Protect Your Network

The emergence of WLANs has created a new breed of security threats to enterprise networks.

Included in HP ProCurve WLAN solutions is security technology that alleviates threats from WLANs through:
* Monitoring wireless activity inside and out of the enterprise
* Classifying WLAN transmissions into harmful and harmless
* Preventing transmissions that pose a security threat to the enterprise network
* Locating participating devices for physical remediation

Download now »

White Paper

Bringing the Edge to the Data Center

Effectively address data protection challenges, implementing solutions that help store and protect business–critical data while cutting costs and improving efficiency and reliability.

Download now »

Sign up to receive Security Resource Alerts

Subscribe to the Security Central Newsletter

Stay informed of the latest security threats and fixes.

White paper

Log Management: How to Develop the Right Strategy for Business and Compliance

This white paper provides guidance on how to develop a strategic approach to managing and monitoring logs, a key function required for compliance with many regulatory mandates and a critical defense against security threats.

Download now! »

White paper

The Essential Series: Security Information Management

Learn about the processes and technologies that support security information management (SIM) operations, as well as the business case for SIM. The series examines different options for implementing SIM and gives you evaluation criteria for selecting the best option for your organization.

Download now! »

White paper

Aberdeen: Choosing and Consuming Managed Security Services

Learn the strategies, actions, and capabilities that Best-in-Class organizations employ and technologies they choose to obtain superior performance against various security performance metrics. This report provides guidelines for identifying which security solutions to consume as a MSS and defines best practices for choosing and managing MSSPs.

Download now! »
©1994-2009 Infoworld, Inc.