TITLE:
Microsoft Windows XP Wireless Zero Configuration Wireless Profile
Disclosure

SECUNIA ADVISORY ID:
SA17064

VERIFY ADVISORY:
http://secunia.com/advisories/17064/

CRITICAL:
Less critical

IMPACT:
Exposure of sensitive information

WHERE:
Local system

OPERATING SYSTEM:
Microsoft Windows XP Professional
http://secunia.com/product/22/
Microsoft Windows XP Home Edition
http://secunia.com/product/16/

DESCRIPTION:
Laszlo Toth has discovered a security issue in Windows XP, which can
be exploited by malicious, local users to gain access to certain
sensitive information.

The security issue is caused due to the Wireless Zero Configuration
service allowing a non-privileged user to retrieve the configured
wireless profiles using the "WZCQueryInterface()" API. The retrieved
profile includes the configured SSIDs and WEP keys, or the PMK
(Pairwise Master Key) that is used for pre-shared key authentication
in WPA (Wi-Fi Protected Access).

The security issue has been confirmed in Windows XP SP2 with KB893357
installed.

SOLUTION:
The security issue reportedly will be fixed in Longhorn.

Grant only trusted users access to affected systems.

PROVIDED AND/OR DISCOVERED BY:
Laszlo Toth

ORIGINAL ADVISORY:
http://www.soonerorlater.hu/index.khtml?article_id=62

OTHER REFERENCES:
KB893357:
http://support.microsoft.com/kb/893357

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