Windows 2000/XP Wi-Fi flaw

By Derek Sooman on January 16, 2006, 12:47 PM
Details of a previously undocumented flaw in Microsoft's handling of Wi-Fi which affects users of Windows 2000 and XP have been made public by Hackers.

The vulnerability was detailed at the Shmoocon hackers conference in Washington DC by self-confessed hacker Mark Loveless, (aka Simple Nomad), a senior security researcher for Vernier Threat Labs.
Seemingly, the issue concerns the way in which the operating systems look for wireless networks during start-up. When a Windows 2000 or XP machine with Wi-Fi starts up, it immediately starts scanning for wireless networks, and if none is found it sets up an ad hoc link using the name of the last wireless network accessed.

If a hacker was aware of the last used network ID, for example knowing the name of a corporate Wi-Fi network address, it could be used to establish a direct local link with the Windows PC offering access to all local drives.

However, the problem only arises if the target machine is not running a firewall. One of the changes in Windows XP SP2 turns the built-in firewall on by default.

Add New Comment

TechSpot Members
Login or sign up for free,
it takes about 30 seconds.
You may also...
Get complete access to the TechSpot community. Join thousands of technology enthusiasts that contribute and share knowledge in our forum. Get a private inbox, upload your own photo gallery and more.