Feeds

Microsoft on the hunt for 'serious' Windows flaw

Mass hijackings at risk

Security for virtualized datacentres

Microsoft bug squashers are investigating reports of a serious security vulnerability in Windows operating systems that could allow attackers to take control of vast numbers of machines, particularly those located off US shores.

A Microsoft spokesman had only minimal details about the investigation, which was prompted by a presentation last week by researcher Beau Butler at the Kiwicon security conference in New Zealand. According to this report in the Sydney Morning Herald, the flaw affects every version of Windows including Vista and is actually the continuation of an old vulnerability that Microsoft supposedly fixed years ago.

The bug, according to Symantec's DeepSight threat notification service, resides in a feature known as Web Proxy Autodiscovery (WPAD), which helps IT administrators automate the configuration of proxy settings in Internet Explorer and other web browsers. The vulnerability can be "widely exploited" to "intercept web sessions, direct browsers to malicious proxies, and effectively gain control over unsuspecting users' web traffic," according to Symantec, which said it had yet to confirm the vulnerability.

Vulnerable browsers will traverse a company's host domain to search for a WPAD data file used to set up the proxy feature. IE running on host a.b.c.d.net, for example, first would look in b.c.d.net, then c.d.net and finally d.net. "In certain configurations, the third-level domain is not a trusted part of the network; an attacker can set up a malicious driftnet-type WPAD server situated outside of an organization's normal administrative control," Symantec warned.

"Now that we understand the issue we're researching comprehensive mitigations and workarounds to protect customers," Microsoft's general manager of product security, George Stathakopoulos, wrote in an email to the Sydney Morning Herald. Engineers in Australia and the US were scrambling to replicate and confirm the issue over the US Thanksgiving holiday, according to the paper. A Microsoft spokesman had no additional details on Monday.

Microsoft appears to have released a patch for the vulnerability in 1999. But the patch only protected domain names ending in .com, so WPAD servers using all other addresses have remained vulnerable. ®

Intelligent flash storage arrays

More from The Register

next story
Just don't blame Bono! Apple iTunes music sales PLUMMET
Cupertino revenue hit by cheapo downloads, says report
The DRUGSTORES DON'T WORK, CVS makes IT WORSE ... for Apple Pay
Goog Wallet apparently also spurned in NFC lockdown
IBM, backing away from hardware? NEVER!
Don't be so sure, so-surers
Hey - who wants 4.8 TERABYTES almost AS FAST AS MEMORY?
China's Memblaze says they've got it in PCIe. Yow
Microsoft brings the CLOUD that GOES ON FOREVER
Sky's the limit with unrestricted space in the cloud
This time it's SO REAL: Overcoming the open-source orgasm myth with TODO
If the web giants need it to work, hey, maybe it'll work
'ANYTHING BUT STABLE' Netflix suffers BIG Europe-wide outage
Friday night LIVE? Nope. The only thing streaming are tears down my face
Google roolz! Nest buys Revolv, KILLS new sales of home hub
Take my temperature, I'm feeling a little bit dizzy
Storage array giants can use Azure to evacuate their back ends
Site Recovery can help to move snapshots around
prev story

Whitepapers

Why and how to choose the right cloud vendor
The benefits of cloud-based storage in your processes. Eliminate onsite, disk-based backup and archiving in favor of cloud-based data protection.
A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Saudi Petroleum chooses Tegile storage solution
A storage solution that addresses company growth and performance for business-critical applications of caseware archive and search along with other key operational systems.
Choosing a cloud hosting partner with confidence
Download Choosing a Cloud Hosting Provider with Confidence to learn more about cloud computing - the new opportunities and new security challenges.