Feeds

MS bitten by old .NET vulnerability

Cross-site scripting again

  • alert
  • submit to reddit

Reducing security risks from open source software

Numerous installations of Microsoft ASP.NET are vulnerable to cross-site scripting (CSS), according to a recent post by Johannes Westerink to the BugTraq mailing list.

CSS leverages JavaScript and makes it possible to place a malicious URL in an e-mail or on a Web site, which if followed will compromise the user's machine by various means, including exposing shares and/or retrieving data files such as cookies.

JavaScript can also be executed on a remote server using malicious URLs. There are numerous possible attacks; but for one common example, a 404 page may be generated with the added bonus of full path disclosure.

Examples discovered by Westerink include:

http://www.msn.com/~/&ltscript&gtalert(document.cookie)</script&gt.aspx?aspxerrorpath=null
http://my.msn.com/~/&ltscript&gtalert(document.cookie)</script&gt.aspx?aspxerrorpath=null
http://dotnet.microsoft.com/&ltscript&gtalert(document.cookie)</script&gt.aspx
http://terraserver.microsoft.net/&ltscript&gtalert(document.cookie)</script&gt.aspx
http://support.microsoft.com/~/&ltscript&gtalert(document.cookie)</script&gt.aspx?aspxerrorpath=null
http://office.microsoft.com/~/&ltscript&gtalert(document.cookie)</script&gt.aspx?aspxerrorpath=null
http://communities.microsoft.com/~/&ltscript&gtalert(document.cookie)</script&gt.aspx
http://uddi.microsoft.com/~/&ltscript&gtalert(document.cookie)</script&gt.aspx

Westerink says he contacted MS about the issue six months ago but never got a reply.

Meanwhile, Internet security and privacy consultant Richard M. Smith, who now maintains the site ComputerBytesMan.com, "checked in with Microsoft about this problem and was told that this is a known bug that was fixed in ASP.NET before the final software was shipped."

So MS got the message all right, but somehow neglected to mention it to anyone, or even thank Westerink for bringing it to their attention.

"The various Microsoft Web servers that still have the bug are running pre-release versions of ASP.NET," Smith adds. "It looks like Microsoft also has trouble keeping up with security patches and updates."

One hopes they'll have got this sorted by press time.... ®

Eight steps to building an HP BladeSystem

More from The Register

next story
BBC goes offline in MASSIVE COCKUP: Stephen Fry partly muzzled
Auntie tight-lipped as major outage rolls on
iPad? More like iFAD: We reveal why Apple fell into IBM's arms
But never fear fanbois, you're still lapping up iPhones, Macs
Amazon Reveals One Weird Trick: A Loss On Almost $20bn In Sales
Investors really hate it: Share price plunge as growth SLOWS in key AWS division
Bose says today is F*** With Dre Day: Beats sued in patent battle
Music gear giant seeks some of that sweet, sweet Apple pie
There's NOTHING on TV in Europe – American video DOMINATES
Even France's mega subsidies don't stop US content onslaught
You! Pirate! Stop pirating, or we shall admonish you politely. Repeatedly, if necessary
And we shall go about telling people you smell. No, not really
Too many IT conferences to cover? MICROSOFT to the RESCUE!
Yet more word of cuts emerges from Redmond
Chips are down at Broadcom: Thousands of workers laid off
Cellphone baseband device biz shuttered
Twitch rich as Google flicks $1bn hitch switch, claims snitch
Gameplay streaming biz and search king refuse to deny fresh gobble rumors
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.