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Insecure Library Loading
Not critical

Windows XP expose registered wireless access points

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Release Date:  2002-12-09    Views:  15,168

Secunia Advisory SA7669

Where:

From remote

Impact:

Exposure of system information

Solution Status:

Unpatched

CVE Reference(s):

No CVE references.

Description


Windows XP is flawed in the way it searches for wireless access points if a registered access point isn't are available.

Windows XP repeatedly sends packets to access points previously registered, this allows an attacker to sniff valid SSIDs, when an access points is reached with a valid SSID XP will start transmitting packets encrypted with WEP.

WEP is known to be easy to decrypt.


Solution:
While this is an inappropriate behavior in XP, part of the problem is due to the weak encryption in wireless LAN technology. The XP SSID broadcast problem can easily be solved by using a third party driver rather than the one supplied by Microsoft.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Nobuo Miwa

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Windows XP expose registered wireless access points

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