Cisco Wireless LAN Controller Software contains a vulnerability that could allow an authenticated, remote attacker to gain unauthorized access to an affected device. Updates are available.
Cisco Wireless LAN Controller (WLC) Software contains a vulnerability that could allow an authenticated, remote attacker to gain unauthorized access to an affected device.
The vulnerability is due to improper access control restrictions that are imposed by the affected software. An authenticated, remote attacker could exploit this vulnerability to view or modify sensitive information such as configuration files on a device that is running the affected software. If successful, an attacker could use this information to conduct further attacks on a targeted system, which could lead to a complete system compromise.
Cisco has confirmed the vulnerability in a security advisory and released updated software.
The following Cisco WLC Software versions are vulnerable while running on the Cisco WLC family of products:
Cisco WLC Software version 220.127.116.11 and prior
Cisco WLC Software version 18.104.22.168 and prior
Cisco WLC Software version 22.214.171.124 and prior
The specific products are listed in the "Vulnerable Products" section in the PSIRT advisory.
To exploit this vulnerability, an attacker would need to authenticate to the affected device, which may require access to an internal, trusted network. This access requirement decreases the likelihood of a successful exploit.
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 this vulnerability to view or modify sensitive information such as configuration files on a targeted system. Successful exploitation could be used to launch further attacks.
The vulnerability is due to improper access restrictions that are imposed by the affected software. As a result, unauthorized access could be obtained via SNMP on a device that is running a vulnerable version of the affected software. The vulnerability could be exploited even if the management over wireless feature is disabled.
An authenticated, remote attacker could exploit this vulnerability to view or modify sensitive information such as configuration files on a device. Successful exploitation could result in a complete system compromise.
Administrators are advised to apply the appropriate updates.
Administrators are advised to implement an intrusion prevention system (IPS) or intrusion detection system (IDS) to help detect and prevent attacks that attempt to exploit this vulnerability.
Administrators are advised to allow only trusted users to have network access.
Administrators may consider using CPU-based ACLs to restrict SNMP access to devices running a vulnerable version of WLC Software.
Administrators are advised to monitor affected systems.
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.
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.