Aussie firm finds Skype flaw

Australian security firm Security-Assessment.com has discovered a flaw with the install of the Windows-based Skype client.

Skype was notified of the potential flaw earlier this month and promptly issued a patch. General vulnerability dissemination was made on May 22, 2006 by Security-Assessment.com.

Skype has confirmed the vulnerability could allow users to "retrieve" files from other Skype users through unauthenticated connections due to a flaw present in the URI (Uniform Resource Identifiers).

The flaw is enabled through the URI handler installed during initiation of the Windows Skype client. It allows additional command line switches to be passed onto the Skype client, potentially allowing a file transfer.

For such a transfer to be initiated the attacker must authorize the victim, done easily through adding the victim to the attacker's contact list, which does not require authorization from the victim or Skype user.

Drazen Drazic, managing director of Security-Assessment.com said the bug affects all releases of Skype to Windows, up to and including the latest versions.

"We have had concerns about VoIP for a while, but there are not too many players in the space, security and otherwise, addressing VoIP security concerns," Drazic said.

"There have been a lot of products rolled out and while only there are a few large Australian implementations, risk review has been an area of research for us.

"We did not release the advisory until Skype got back to us and announced a patch which was Monday morning (22/05) last week."

Exploitation of the flaw will only occur when the potential victim opens the URI exploit in Internet Explorer, which also requires the user to visit or open a compromised HTML page. The attacker must also know the location of the specific file on the intended machine; however, a common target would be the Skype configuration file.

Join the PC World newsletter!

Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Michael Crawford

Computerworld
Show Comments

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Matthew Stivala

HP OfficeJet 250 Mobile Printer

The HP OfficeJet 250 Mobile Printer is a great device that fits perfectly into my fast paced and mobile lifestyle. My first impression of the printer itself was how incredibly compact and sleek the device was.

Armand Abogado

HP OfficeJet 250 Mobile Printer

Wireless printing from my iPhone was also a handy feature, the whole experience was quick and seamless with no setup requirements - accessed through the default iOS printing menu options.

Azadeh Williams

HP OfficeJet Pro 8730

A smarter way to print for busy small business owners, combining speedy printing with scanning and copying, making it easier to produce high quality documents and images at a touch of a button.

Andrew Grant

HP OfficeJet Pro 8730

I've had a multifunction printer in the office going on 10 years now. It was a neat bit of kit back in the day -- print, copy, scan, fax -- when printing over WiFi felt a bit like magic. It’s seen better days though and an upgrade’s well overdue. This HP OfficeJet Pro 8730 looks like it ticks all the same boxes: print, copy, scan, and fax. (Really? Does anyone fax anything any more? I guess it's good to know the facility’s there, just in case.) Printing over WiFi is more-or- less standard these days.

Ed Dawson

HP OfficeJet Pro 8730

As a freelance writer who is always on the go, I like my technology to be both efficient and effective so I can do my job well. The HP OfficeJet Pro 8730 Inkjet Printer ticks all the boxes in terms of form factor, performance and user interface.

Michael Hargreaves

Windows 10 for Business / Dell XPS 13

I’d happily recommend this touchscreen laptop and Windows 10 as a great way to get serious work done at a desk or on the road.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?