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Cisco Wireless LAN Controllers Encryption Bypass Vulnerability
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Secunia Advisory:
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SA17406
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Release Date:
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2005-11-03
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Popularity:
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8,034 views
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Critical:
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Less critical
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Impact:
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Security Bypass
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Where:
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From local network
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Solution Status:
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Vendor Patch
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| OS: | Cisco 2000 Series Wireless LAN Controller
Cisco 4400 Series Wireless LAN Controller
Cisco Aironet 1130 AG Series Access Point
Cisco Aironet 1200 Series Access Point
Cisco Aironet 1240 AG Series Access Point
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Description:
A vulnerability has been reported in Cisco WLAN (Wireless LAN) Controllers, which can be exploited by malicious people to bypass certain security restrictions.
The vulnerability is caused due to the WLAN controller accepting unencrypted traffic from end hosts even when it is configured to perform encryption. This can be exploited to send malicious traffic to a secure wireless network by spoofing the MAC address of a legitimate, already authenticated end host.
Successful exploitation requires that the access points are operating in LWAPP (Lightweight Access Point Protocol) mode, and controlled by a separate WLAN Controller.
The vulnerability has been reported in Cisco 1200, 1131, and 1240 series access points controlled by Cisco 2000 and 4400 series Airespace WLAN Controllers with software version 3.1.59.24.
Solution:
Update to version 3.1.105.0 of the WLAN Controller software.
Cisco 2000 Series WLAN Controller:
http://www.cisco.com/pcgi-bin/tablebuild.pl/2000_series_Wireless_LAN_controller
Cisco 4400 Series WLAN Controller:
http://www.cisco.com/pcgi-bin/tablebuild.pl/4400_series_Wireless_LAN_controller
Original Advisory:
http://www.cisco.com/warp/public/707/cisco-sa-20051102-lwapp.shtml
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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