Cisco Wireless LAN Controller Software contains a vulnerability that could allow an authenticated, remote attacker to cause a denial of service condition on a targeted system. Updates are available.
A vulnerability in the Web Administrator Interface of Cisco Wireless LAN Controllers (WLC) could allow an authenticated, remote attacker to cause a denial of service (DoS) condition.
The vulnerability is due to a failure to properly validate certain parameters prior to processing them on the device. An authenticated attacker with an account that is a member of either the Full Manager, Read Only, or Lobby Ambassador managers group could exploit this vulnerability by submitting a request to the affected device that contains a missing or malformed value for specific parameters. An exploit could allow the attacker to crash the device, resulting in a DoS condition, during a system reboot.
Cisco has confirmed the vulnerability in a security notice and released software updates.
At the time this alert was first published, Cisco Wireless LAN Controller Software versions 7.5(.102.0) and prior were vulnerable. Later releases of Cisco Wireless LAN Controller Software versions may also be vulnerable.
To exploit this vulnerability, an attacker must authenticate to the targeted device. This access requirement limits 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.
Cisco has released a security notice at the following link: CVE-2013-3474
An authenticated, remote attacker could exploit this vulnerability to cause an affected device to crash during a system reboot, resulting in a DoS condition.
The vulnerability is due to improper validation of certain parameters prior to processing them by the affected software.
An authenticated, remote attacker that is a member of the Full Manager, Read Only, or Lobby Ambassador managers group could exploit this vulnerability by sending missing or malformed values for specific parameters to be processed by an affected device. If successful, the attacker could cause the device to crash during a system reboot, resulting in a DoS condition.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
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 affected systems.
Cisco customers with active contracts should contact their Cisco support team for assistance in upgrading to a software version that includes fixes for this vulnerability. Cisco customers without contracts may contact the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at firstname.lastname@example.org for assistance.
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.