Cisco has released an updated security advisory to identify additional software versions affected by the Cisco Wireless LAN Controller privilege escalation vulnerabilities.
Cisco Wireless LAN Controller (WLC) software contains vulnerabilities that could allow an authenticated, remote attacker to gain elevated privileges.
The vulnerabilities are due to improper security controls.? An authenticated, remote attacker could exploit the vulnerabilities to gain elevated privileges on the device, possibly resulting in complete compromise.
Cisco has confirmed the vulnerabilities in a security advisory and released updated software.
Devices running the following versions of Cisco Wireless LAN Controller are vulnerable:
All 4.0 versions
All 4.1 versions
All 4.1M versions
Versions prior to 18.104.22.168
Versions prior to 22.214.171.124M
All 5.0 versions
All 5.1 versions
Versions prior to 126.96.36.199
Versions prior to 188.8.131.52
To exploit the vulnerabilities, an attacker must be able to authenticate to a targeted device.? The attacker may also require access to trusted networks to establish a connection with a device.? The access requirements greatly reduce the potential for exploitation.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
An authenticated, remote attacker could exploit the vulnerabilities to gain additional privileges on the device, possibly resulting in complete compromise.
The vulnerabilities are due to improper security controls on Cisco WLC management interfaces.? An authenticated, remote attacker with read-only access could exploit the vulnerabilities to make modifications to the device configuration.? The modifications may allow the attacker to gain elevated privileges on the device, possibly resulting in complete compromise.
Administrators are advised to apply the available software updates.
Administrators are advised to restrict access to affected systems.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to monitor critical systems.
The Cisco Applied Intelligence team has created the following companion document to guide administrators in identifying and mitigating attempts to exploit this vulnerability prior to applying updated software: cisco-amb-20100908-wlc?
Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at email@example.com.
Version 1, September 8, 2010, 12:10 PM: Cisco Wireless LAN Controller software contains vulnerabilities that could allow an authenticated, remote attacker to gain elevated privileges. Updates are available.
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.