Feeds

MS DNS patch snuffs net connection for ZoneAlarm users

A cure worse than the disease

Remote control for virtualized desktops

Updated Microsoft released four patches - all rated important - as part of its regular Patch Tuesday update cycle, one of which left ZoneAlarm users locked out the internet.

The most significant of the quartet fixes a flaw in Windows' implementations of the Domain Name System protocol (MS08-037.mspx). Multiple vendors are subject to the DNS-spoofing vulnerability, which stems from a fundamental weakness involving a lack of entropy in DNS queries rather than a specific security bug. Successfully exploiting the flaw could allow hackers to spoof DNS replies, creating a means to redirect network traffic or to mount man-in-the-middle attacks.

Unfortunately Microsoft's fix creates problems in itself, leaving users of the popular ZoneAlarm firewall unable to access the internet after they apply the patch.

The experiences of Reg reader Steve seem typical. "I woke up this morning to no internet at all and on calling my ISP's tech support I was told there was an issue with the latest patches and Zone Alarm," he reports. "I have uninstalled Zone Alarm and everything now works fine. Not sure who is to blame on this one but it has been a pain."

ZoneAlarm has published a list of recommended workarounds to dealing for the glitch here.

Microsoft's three other patches cover vulnerabilities in Exchange server and SQL Server and, on the desktop, bugs in Windows Explorer. The Explorer vuln potentially creates a means for hackers to inject malware onto vulnerable systems running Windows Vista. This flaw - along with cross-site scripting vulnerabilities in Outlook for Web Access that affect MS Exchange and information disclosure bugs in SQL Server - are all rated "important" by Redmond but "critical" by security watchers at the SANS Institute's Internet Storm centre.

Redmond's summary can be found here. ISC's easier to understand "Black Tuesday" overview is here. ®

Remote control for virtualized desktops

More from The Register

next story
Webcam hacker pervs in MASS HOME INVASION
You thought you were all alone? Nope – change your password, says ICO
You really need to do some tech support for Aunty Agnes
Free anti-virus software, expires, stops updating and p0wns the world
Meet OneRNG: a fully-open entropy generator for a paranoid age
Kiwis to seek random investors for crowd-funded randomiser
USB coding anarchy: Consider all sticks licked
Thumb drive design ruled by almighty buck
Attack reveals 81 percent of Tor users but admins call for calm
Cisco Netflow a handy tool for cheapskate attackers
Privacy bods offer GOV SPY VICTIMS a FREE SPYWARE SNIFFER
Looks for gov malware that evades most antivirus
Patch NOW! Microsoft slings emergency bug fix at Windows admins
Vulnerability promotes lusers to domain overlords ... oops
prev story

Whitepapers

Choosing cloud Backup services
Demystify how you can address your data protection needs in your small- to medium-sized business and select the best online backup service to meet your needs.
Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
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.
New hybrid storage solutions
Tackling data challenges through emerging hybrid storage solutions that enable optimum database performance whilst managing costs and increasingly large data stores.